Flexible lifting device and lifting method for lifting steel bar parts

Abstract

The present invention relates to the technical field of bridge construction, and specifically refers to a flexible hoist and hoisting method for steel bar components. The suspension beam is fixedly connected to the tower movable pulley block; the upper ends of the four groups of hydraulic adjustment structures are respectively fixed to the four corners of the suspension beam; the slewing support beam is connected to the lower ends of the four groups of hydraulic adjustment structures; the slewing structure is installed on the slewing support beam; the middle of the slewing cross beam is connected to the slewing structure; the support bracket is fixedly connected to the lower end surface of the slewing cross beam, and a plurality of adjustable lifting points are arranged on the support bracket; the sling structure corresponds to the lifting point one by one, the upper end of the sling structure is connected to the lifting point, and the lower end of the sling structure is used to connect the steel bar components; the hydraulic balance structure is arranged on the sling structure. The hoisting precision of the hoist of the present invention is extremely high, and it avoids the situation that the forces on each lifting point are uneven due to the large number of lifting points, which leads to the situation that some lifting points of the steel bar components are subjected to large forces and local deformation, and reduces the installation and adjustment time.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, and in particular to a flexible hoisting device and a hoisting method for hoisting steel bar components. Background Art

[0002] The general construction sequence for the construction of reinforced concrete towers of modern suspension bridges and cable-stayed bridges is to install the steel bars first, then set up the formwork with a special hydraulic climbing formwork device, pour the concrete and vibrate it before curing. The installation of the steel cage has evolved from bulk to the steel cage being assembled as a whole in the main structure of the steel production workshop and then transported to the construction site. It is then hoisted onto the tower with an attached tower crane and special hoisting equipment for overall docking and installation. This process can greatly improve work efficiency and save a certain amount of labor consumption.

[0003] The overall hoisting of steel bar parts has the following characteristics and requirements:

[0004] 1. The size of each steel bar component decreases as the tower column height increases, and the position of the component's hanging point also changes;

[0005] 2. Due to the diversity of high cable tower structures, the structure of steel bar components is variable. At the same time, due to the existence of installation errors and the asymmetry of the mass distribution inside the structure, the center of gravity of the components often does not coincide with the center of the hanging point;

[0006] 3. When installing steel bar parts, their spatial posture has a great influence on the docking installation. If the posture is too tilted or twisted, a lot of manpower is needed to constantly correct the position, and it is often very difficult to adjust the posture in the air;

[0007] 4. The overall rigidity of the steel bar components is relatively small, and the entire structure is supported by a rigid skeleton. In order to prevent excessive local force and large deformation during lifting, the lifting structure needs to be equipped with many lifting points to ensure that the lifting force surface is evenly loaded. However, too many lifting points will also cause installation and dimensional errors, making it impossible to evenly load each lifting point.

[0008] In view of the above-mentioned characteristics and requirements of steel bar component hoisting construction, a new type of hoisting mechanism is urgently needed to meet the needs of component hoisting, improve installation quality and work efficiency, and reduce installation time. Summary of the invention

[0009] The purpose of the present invention is to solve the deficiencies of the above-mentioned background technology and to provide a flexible hoisting device and a hoisting method for hoisting steel bar components.

[0010] The technical solution of the present invention is: a flexible hanger for lifting steel bar parts, comprising a suspension beam, wherein the suspension beam is fixedly connected to a tower motor pulley block;

[0011] Four sets of hydraulic adjustment structures, the upper ends of which are respectively fixed to the four corners of the suspension beam, for adjusting the inclination angles of the steel bar parts in the X and Y directions and adjusting the height in the Z direction;

[0012] A slewing support beam, wherein the slewing support beam is connected to the lower ends of the four sets of hydraulic adjustment structures;

[0013] A slewing structure, which is installed on the slewing support beam and is used to drive the steel bar component to rotate around the Z axis;

[0014] A revolving cross beam, the middle of which is connected to the revolving structure;

[0015] A support bracket, wherein the support bracket is fixedly connected to the lower end surface of the rotating cross beam, and a plurality of position-adjustable suspension points are arranged on the support bracket;

[0016] A plurality of sling structures, wherein the sling structures correspond to the sling points one by one, the upper ends of the sling structures are connected to the sling points, and the lower ends of the sling structures are used to connect the steel bar components;

[0017] A hydraulic balancing structure is provided on the sling structure and is used for vertically adjusting the sling structure to balance the pressure at all sling points.

[0018] According to a flexible hanger for lifting steel bar parts provided by the present invention, the hydraulic balance structure comprises:

[0019] A bracket, wherein the upper ear plate and the lower ear plate of the bracket are respectively fixedly connected to the sling structure;

[0020] A telescopic oil cylinder, the shell of which is fixed on the bracket, and the piston end of which can be telescoped vertically;

[0021] A screw rod, the upper end of which is fixed to the piston end of the telescopic oil cylinder, and the lower end of which passes through the lower end ear plate of the bracket and is connected to the sling structure;

[0022] All telescopic cylinders on the support bracket are connected in series and controlled by the same hydraulic system; the screw rod is fixed to the lower end ear plate through a locking nut after the telescopic cylinder and the steel bar component are balanced in weight.

[0023] According to a flexible sling for slinging steel bar parts provided by the present invention, the sling structure comprises:

[0024] An upper basket bolt, the upper end of which is connected to a hanging point on the support bracket, and the lower end of which is vertically adjustable and connected to an upper ear plate of the bracket;

[0025] A sling, the upper end of which is connected to a Y-shaped joint at the lower end of the screw rod through a latch;

[0026] A lower turnbuckle bolt, the upper end of which is connected to the lower end of the sling, and the lower end is used to be connected to the steel bar component.

[0027] According to a flexible hanger for lifting steel bar parts provided by the present invention, the support bracket comprises:

[0028] A lower bracket, wherein the lower bracket is a frame structure fixed to the lower end of the rotating cross beam;

[0029] An upper hanger, the upper hanger comprising a plurality of I-beams and threaded steel bars passing through the I-beams;

[0030] The threaded steel bars are fixed on the lower hanging bracket, and locking nuts are passed through the threaded steel bars; the I-beams are position-adjustable and passed through the threaded steel bars and are fixed to the threaded steel bars by locking nuts after the position adjustment is completed, and a number of hanging points are arranged on each I-beam.

[0031] According to a flexible hanger for lifting steel bar components provided by the present invention, the lower hanger includes a plurality of support beams, and the plurality of support beams are crisscrossed and arranged to form a crisscross frame structure corresponding to the steel bar components.

[0032] According to a flexible hanger for hanging steel bar parts provided by the present invention, a plurality of vertically intersecting I-beams are arranged on the support beam; and hanging points are arranged at both ends of the I-beams beyond the corresponding support beams.

[0033] According to a flexible hanger for lifting steel bar parts provided by the present invention, the hydraulic positioning structure comprises:

[0034] A hydraulic jack, the upper end of which is connected to the suspension beam via a pin;

[0035] A lifting steel strand, wherein the upper end of the lifting steel strand is fixedly connected to the lower end of the hydraulic jack;

[0036] The steel strand anchor head is fixedly connected to the lower end of the lifting steel strand, and the steel strand anchor head is fixedly connected to the slewing support crossbeam through a pin shaft.

[0037] According to a flexible hanger for lifting steel bar parts provided by the present invention, the rotary structure comprises:

[0038] A slewing bearing, wherein the inner ring of the slewing bearing is fixed to the lower end surface of the slewing support beam, and the outer ring of the slewing bearing is fixed to the main beam;

[0039] A plurality of rotary motors are installed on the rotary support beam, and the rotary motors are transmission-connected to the outer ring of the rotary bearing through a rotary gear.

[0040] The present invention also provides a method for hoisting steel bar components, using the above-mentioned flexible hoisting device for hoisting steel bar components, comprising the following steps:

[0041] S1. Adjust the position of the hanging point on the support bracket according to the hanging point size of the steel bar component;

[0042] S2. Operate the tower crane to move the spreader to the top of the steel bar component, and adjust the spreader to a horizontal state and a suitable angle through four sets of hydraulic adjustment structures and a rotary structure;

[0043] S3. Lower the slings through four sets of hydraulic adjustment structures to connect the sling structure with the lifting points of the steel bar components;

[0044] S4. Adjust all the sling structures through the hydraulic balance structure to balance the lifting weight of the steel bar components by all the sling structures, and then fix the sling structures;

[0045] S5. Operate the tower crane to lift the steel bar component as a whole to the installation position, adjust the aerial posture of the steel bar component through four sets of hydraulic adjustment structures and rotating structures, lower the steel bar component as a whole to the installation position, and realize the in-place installation.

[0046] According to a method for lifting steel bar components provided by the present invention, in step S4, the method for adjusting all the sling structures by means of a hydraulic balance structure comprises: starting the telescopic cylinders in all the hydraulic balance structures, gradually contracting the telescopic cylinders until the lifting weight of the steel bar components is balanced, fixing the screws in all the hydraulic balance structures on the lower end ear plates of the bracket by means of locking nuts, and unloading all the telescopic cylinders.

[0047] The advantages of the present invention are as follows: 1. The present invention can adjust the aerial posture of the steel bar component through four sets of hydraulic adjustment structures and a rotary structure, which is convenient for the alignment installation of the steel bar component, the installation of the steel bar component is more accurate, and the construction efficiency is higher;

[0048] The present invention constructs a multi-hanging-point hanger structure, so that the hanger can meet the working condition requirements of multiple hanging points and constantly changing hanging point positions caused by insufficient rigidity of steel bar parts, thereby meeting the hoisting requirements;

[0049] By installing a hydraulic balance structure on the sling structure, the hydraulic balance structure is used to balance the lifting weight of the steel bar parts, avoiding the situation where the forces on each lifting point are uneven due to multiple lifting points, which may cause local deformation of some lifting points of the steel bar parts. The hydraulic balance group control system is simple and convenient to operate, reducing the installation and adjustment time and risks.

[0050] 2. The hydraulic balance structure of the present invention connects all telescopic cylinders in series and is uniformly controlled by the hydraulic system, which can easily ensure the balance of the lifting weight of the steel bar parts, so that the force of each lifting point is balanced, and there will be no local deformation problem due to uneven force on the lifting points, thereby improving the safety and stability of the lifting of steel bar parts;

[0051] 3. The sling structure of the present invention is simple. The support bracket and the steel bar component are respectively connected by two sets of basket bolts. The basket bolts themselves can be adjusted vertically, which is convenient for connecting and installing the steel bar component and is extremely simple to operate.

[0052] 4. The support bracket of the present invention includes a lower bracket and an upper bracket, and the upper bracket includes an I-beam and a threaded steel bar. The I-beam can be adjusted and moved on the threaded steel bar to achieve adjustable hanging point positions on the I-beam, thereby adapting to hanging points of steel bar components of different specifications and sizes, and the adjustment is simple and the connection is extremely convenient;

[0053] 5. The lower rack structure of the present invention is a tic-tac-toe frame structure formed by staggered arrangement of multiple support beams. The middle of the tic-tac-toe frame is connected to a revolving cross beam. The upper rack is arranged on the four extension structures of the tic-tac-toe frame. The structure is simple, the stability is good, the materials are easy to obtain, and the cost is low.

[0054] 6. The present invention arranges multiple I-beams on the support beam, and the suspension points are installed on the parts of the two ends of the I-beams that exceed the support beam. This installation mode has good structural stability, is not prone to the risk of lateral deviation, and is easy to adjust;

[0055] 7. The hydraulic adjustment structure of the present invention is extremely simple. The hydraulic jack cooperates with the steel strand to adjust the hanger and the steel bar parts. The hydraulic jack has a simple control method, high control accuracy, and convenient layout. The adjustment structure of the four hanging points can well adjust the aerial posture of the steel bar parts, which provides great convenience for the installation of the steel bar parts and further reduces manual operation and working time.

[0056] 8. The rotary structure of the present invention is simple, easy to operate, and has extremely high control and adjustment accuracy. When used in conjunction with the four-hanging point hydraulic adjustment structure, it can well adjust the posture of the steel bar parts during the lifting process, greatly improving safety, and the lifting efficiency is extremely high, reducing manual operations;

[0057] 9. The method for hoisting steel bar components of the present invention is simple and easy to operate. It can ensure that each lifting point between the steel bar component and the hoist is balanced, and there will be no imbalance problem between them due to multiple lifting points. The steel bar component will not be deformed during the hoisting process, and safety and stability can be guaranteed.

[0058] 10. The present invention has an extremely simple method for adjusting the balance of the lifting weight at the lifting point. The telescopic force is unified by connecting the telescopic cylinders in series. After the weight is balanced, the weight balance between the lifting device and the steel bar component can be achieved by fixing the screw with a locking nut.

[0059] The steel bar component hanger of the present invention is a multi-hanging point hanger with extremely high hoisting accuracy, and avoids the uneven force on each hanging point caused by multiple hanging points, which leads to large force on some hanging points of the steel bar component and produces local deformation. The hydraulic balance group control system is simple and convenient to operate, reducing installation and adjustment time and risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 : Schematic diagram of the structure of the lifting device for lifting steel bars of the present invention;

[0061] Figure 2 : Schematic diagram of the hydraulic balance structure of the present invention;

[0062] Figure 3 : A side view of the support bracket of the present invention;

[0063] Figure 4 : A top view of the support bracket of the present invention;

[0064] Figure 5 : Schematic diagram of the rotary structure of the present invention;

[0065] Among them: 1-suspension beam; 101-hydraulic jack; 102-lifting steel strand; 103-steel strand anchor head; 2-slewing support beam; 201-slewing bearing; 202-slewing motor; 203-slewing gear; 3-slewing cross beam; 4-support bracket; 401-I-beam; 402-threaded steel bar; 403-support beam; 5-bracket; 501-upper end ear plate; 502-lower end ear plate; 6-telescopic cylinder; 7-screw; 8-upper basket bolt; 9-sling; 10-lower basket bolt; 11-Y-type joint; 12-movable pulley block. DETAILED DESCRIPTION

[0066] The embodiments of the present invention are described in detail below, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0067] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0068] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0069] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0070] The present application relates to a flexible sling for lifting steel bar parts. The sling of the present application is a sling structure with multiple lifting points. It is connected to the steel bar parts through multiple lifting points, so that the sling can meet the working conditions of multiple lifting points and constantly changing lifting point positions caused by insufficient rigidity of the steel bar parts, thus meeting the lifting requirements. In addition, considering that there may be problems such as uneven forces between the multiple lifting points, which may cause deformation of the steel bar parts, the present application also provides a hydraulic balance structure on the sling, and uses the hydraulic balance structure to adjust all the lifting points of the sling so that the forces on all the lifting points of the sling are completely equal, ensuring that the steel bar parts will not be deformed during the lifting process, reducing the installation adjustment time and risks.

[0071] Specifically, the flexible sling of the present application includes a suspension beam 1, four groups of hydraulic positioning structures, a slewing support beam 2, a slewing structure, a slewing cross beam 3, a support bracket 4, multiple sling structures and a hydraulic balance structure. In fact, the sling of the present application includes two parts. One is the aerial attitude adjustment part, including the suspension beam 1, four groups of hydraulic positioning structures, a slewing support beam 2, a slewing structure and a slewing cross beam 3; the other is the suspension point connection structure, including the support bracket 4, multiple sling structures and a hydraulic balance structure.

[0072] The suspension beam 1 is a beam structure fixedly connected to the tower motor pulley block 12. Figure 1As shown, the suspension beam 1 is an I-shaped box-type structure, which is welded into a whole by a number of high-strength alloy steel plates. The upper part of the suspension beam 1 is connected to the two movable pulley groups 12 of the tower crane through two pin shafts. Four groups of hydraulic positioning structures are arranged below the suspension beam 1. The upper ends of the four groups of hydraulic positioning structures are respectively fixed to the four corners of the suspension beam 1, which are used to adjust the inclination angles in the X and Y directions and the height in the Z direction of the steel bar parts. During the adjustment process, one or more groups of hydraulic positioning structures corresponding to the four groups of hydraulic positioning structures are adjusted, that is, the inclination angle in the X or Y direction can be adjusted, and the height in the Z direction can be adjusted by synchronously driving the four groups of hydraulic positioning structures.

[0073] The slewing support beam 2 is a tic-tac-toe structure, and the main force-bearing structures on both sides are box beam structures, connected in the middle by an I-beam. The slewing support beam 2 is equipped with a slewing structure, which is used to drive the steel bar component to rotate around the Z axis. The middle position of the slewing cross beam 3 is connected to the slewing structure. In fact, it is the slewing structure that drives the slewing cross beam 3 to rotate around the Z axis, so as to adjust the rotation angle of the steel bar component.

[0074] like Figures 1 to 4 As shown, the support bracket 4 is fixedly connected to the lower end surface of the rotating cross beam 3. A plurality of adjustable suspension points are arranged on the support bracket 4. The sling structure corresponds to the suspension point one by one. The upper end of the sling structure is connected to the suspension point, and the lower end of the sling structure is used to connect the steel bar parts. The hydraulic balance structure is arranged on the sling structure, which is used to vertically adjust the sling structure to balance the pressure of all suspension points.

[0075] In actual use, follow the steps below:

[0076] S1. Adjust the position of the hanging point on the support bracket 4 according to the hanging point size of the steel bar component;

[0077] S2. Operate the tower crane to move the spreader to the top of the steel bar component, and adjust the spreader to a horizontal state and a suitable angle through four sets of hydraulic adjustment structures and a rotary structure;

[0078] S3. Lower the slings through four sets of hydraulic adjustment structures to connect the sling structure with the lifting points of the steel bar components;

[0079] S4. Adjust all the sling structures through the hydraulic balance structure to balance the lifting weight of the steel bar components by all the sling structures, and then fix the sling structures;

[0080] S5. Operate the tower crane to lift the steel bar component as a whole to the installation position, adjust the aerial posture of the steel bar component through four sets of hydraulic adjustment structures and rotating structures, lower the steel bar component as a whole to the installation position, and realize the in-place installation.

[0081] In some embodiments of the present application, the present application optimizes the above-mentioned hydraulic balance structure, specifically as follows: Figures 1-2 As shown, the hydraulic balancing structure includes a bracket 5, a telescopic cylinder 6 and a screw 7. The bracket 5 is a supporting structure for installing the telescopic cylinder 6. The upper ear plate 501 and the lower ear plate 502 of the bracket 5 are respectively fixed to the sling structure. The shell of the telescopic cylinder 6 is fixed on the bracket 5, and the piston end of the telescopic cylinder 6 can be telescoped vertically. The upper end of the screw 7 is fixed to the piston end of the telescopic cylinder 6, and the lower end passes through the lower ear plate 502 of the bracket 5 to connect with the sling structure. In this embodiment, all the telescopic cylinders 6 on the support bracket 4 are connected in series and controlled by the same hydraulic system. The screw 7 is fixed to the lower ear plate 502 through a locking nut after the telescopic cylinder 6 and the steel bar component are balanced.

[0082] When in use, after the sling structure is connected to the lifting point of the steel bar component and tightened, the hydraulic system drives all the telescopic cylinders 6 to retract, so that the screw rod 7 is lifted upward to apply vertical force to the steel bar component until the steel bar component and the weight of all the telescopic cylinders 6 are balanced, and then the screw rod 7 and the bracket 5 are fixed. At this time, the sling structure is a connection structure that cannot be extended or contracted, and the steel bar component and the weight of all the telescopic cylinders 6 are maintained in a balanced state, ensuring that the steel bar component will not be deformed during the lifting process.

[0083] In a further embodiment of the present application, the present embodiment optimizes the above-mentioned sling structure, specifically as follows Figure 1 and 2 As shown, the sling structure includes an upper turnbuckle bolt 8, a sling 9 and a lower turnbuckle bolt 10. The upper end of the upper turnbuckle bolt 8 is connected to the sling point on the support bracket 4, and the lower end is vertically adjustable and connected to the upper end ear plate 501 of the bracket 5. The upper end of the sling 9 is connected to the Y-shaped joint 11 at the lower end of the screw rod 7 through a latch. The upper end of the lower turnbuckle bolt 10 is connected to the lower end of the sling 9, and the lower end is used to connect with the steel bar component.

[0084] The upper turnbuckle bolt 8 and the lower turnbuckle bolt 10 can be adjusted in the vertical direction, which is convenient for connecting the sling structure with the sling point of the steel bar component. The connection method is simple and convenient for construction workers to operate.

[0085] In some embodiments of the present application, the structure of the support bracket 4 is further optimized, specifically as follows: Figures 3-4 As shown, the support bracket 4 of this embodiment includes a lower bracket and an upper bracket, the lower bracket is a frame structure fixed to the lower end of the rotating cross beam, and the rotation angle is adjusted by the rotating structure on the rotating cross beam 3. The upper bracket includes a plurality of I-beams 401 and threaded steel bars 402 passing through the I-beams 401, the threaded steel bars 402 are fixed to the lower bracket, and locking nuts are passed through the threaded steel bars 402. The I-beams 401 are positionally adjustable and passed through the threaded steel bars 402 and fixed to the threaded steel bars 402 by locking nuts after the position adjustment is completed, and a plurality of suspension points are arranged on each I-beam 401.

[0086] The support bracket 4 of the present embodiment is a bracket structure with multiple hanging points. In order to adapt to the hanging point sizes of steel bar components of different specifications, the position of the I-beam 401 of the present embodiment can be adjusted accordingly, and the position can be adjusted according to the hanging point sizes of the steel bar components. After the adjustment is completed, the I-beam 401 is fixed to the threaded steel bar 402 by a locking nut to prevent the I-beam 401 from shaking on the support bracket 4, thereby improving the stability of use.

[0087] In some other embodiments of the present application, the present embodiment further optimizes the above-mentioned lower rack structure, specifically as follows: Figures 3-4 As shown, the lower bracket includes a plurality of support beams 403, and the plurality of support beams 403 are arranged in a crisscross pattern to form a tic-tac-toe frame structure corresponding to the steel bar component. The lower bracket of this embodiment includes four support beams 403, which are divided into two groups, each group includes two support beams 403 arranged in parallel with each other, and the two groups intersect vertically to form a tic-tac-toe structure, the middle position of the tic-tac-toe structure is connected to the rotating cross beam 3, and the surrounding extension parts of the tic-tac-toe structure are used to arrange the I-beam 401.

[0088] In the preferred embodiment of the present application, the present embodiment further optimizes the structure of the support beam 403, specifically as follows: Figures 3-4 As shown, a plurality of vertically intersecting I-beams 401 are arranged on the support beam 403, and hanging points are arranged at both ends of the I-beams 401 beyond the corresponding support beams 403. In this embodiment, eight I-beams 401 are arranged on each group of support beams 403, and the eight I-beams 401 are divided into two groups, and the two groups are placed on both sides of the rotating cross beam 3.

[0089] In some embodiments of the present application, the present embodiment optimizes the above-mentioned hydraulic adjustment structure, specifically, Figure 1 As shown, the hydraulic positioning structure of this embodiment includes a hydraulic jack 101, a lifting steel strand 102 and a steel strand anchor 103. The hydraulic jack 101 is a continuous lifting jack that can be vertically extended and retracted. The upper end of the hydraulic jack 101 is connected to the suspension beam 1 through a pin. The upper end of the lifting steel strand 102 is fixedly connected to the lower end of the hydraulic jack 101. The steel strand anchor 103 is fixedly connected to the lower end of the lifting steel strand 102, and the steel strand anchor 103 is fixedly connected to the slewing support beam 2 through a pin.

[0090] Four groups of hydraulic jacks 101 are placed at the four corners of the suspension beam 1 to form a four-hanging point structure. Synchronously adjusting the two groups of hydraulic jacks 101 on the same side of the suspension beam 1 can adjust the inclination angle in that direction. For example, synchronously adjusting the two groups of hydraulic jacks 101 on the X side can adjust the inclination angle of the suspended object in the X direction.

[0091] In some other embodiments of the present application, the present embodiment optimizes the above-mentioned rotary structure, specifically as follows Figure 5 As shown, the rotary structure includes a rotary bearing 201 and a rotary motor 202. The inner ring of the rotary bearing 201 is fixed to the lower end surface of the rotary support beam 2, and the outer ring of the rotary bearing 201 is fixed to the rotary cross beam 3. The rotary cross beam 3 can generate a relative displacement with the rotary support beam 2 around the axis (Z axis) of the rotary bearing 201 through the rotary bearing 201. Screw holes are reserved on the rotary support beam 2 and the rotary cross beam 3, and the rotary bearing 201 can be fixed to the rotary support beam 2 and the main beam 3 through the bolt structure. In this embodiment, a plurality of rotary motors 202 are provided, and the rotary motors 202 are installed on the rotary support beam 2. The rotary motors 202 are connected to the outer ring of the rotary bearing 201 through the rotary gear 203.

[0092] The rotating structure is used to adjust the Z-axis rotation angle of the steel bar component. When the Z-axis rotation angle of the heavy object needs to be adjusted, the outer ring of the rotating bearing 201 is driven to rotate by the rotating motor 202, and the rotating cross beam 3 rotates with the outer ring of the rotating bearing 201, so that the Z-axis rotation angle of the steel bar component can be adjusted.

[0093] When the sling of this application is used in a specific application, the following steps are followed:

[0094] A1. Adjust the position of the hanging point on the support bracket 4 according to the size of the hanging point of the steel bar component;

[0095] Specifically, according to the size of the hanging point on the steel bar component, the position of the I-beam 401 is adjusted so that the hanging point position on the I-beam 401 corresponds to the hanging point position on the steel bar component. After the adjustment is completed, the I-beam 401 is fixed to the threaded steel bar 402 by a locking nut;

[0096] A2. Operate the tower crane to move the lifting device to the top of the steel bar component, and adjust the lifting device to a horizontal state and a suitable angle through four sets of hydraulic adjustment structures and a rotary structure;

[0097] Specifically, a sensor may be installed on the support bracket 4 or the slewing cross beam 3, and the sensor may be used to monitor the horizontality and angular position of the support bracket 4. According to the horizontality and angular position obtained by monitoring, the horizontality of the support bracket 4 may be adjusted by four sets of hydraulic jacks 101, and the angular position of the support bracket 4 may be adjusted by driving the slewing bearing 201 through the slewing motor 202 to ensure that the support bracket 4 is horizontal and at a suitable angular position.

[0098] A3. Lower the slings through four sets of hydraulic adjustment structures to connect the sling structure with the lifting points of the steel bar parts;

[0099] Specifically, four groups of hydraulic jacks 101 are synchronously lowered to 40 cm, the structural sling structure is connected to the steel bar part, the telescopic length of the upper turnbuckle bolt 8 and the lower turnbuckle bolt 9 is adjusted, and the lower turnbuckle bolt 9 is connected to the lifting point on the steel bar part;

[0100] A4. Adjust all the sling structures through the hydraulic balance structure to balance the weight of the steel bar components, and then fix the sling structures;

[0101] Specifically, four groups of hydraulic jacks 101 are synchronously driven to lift the sling, so that the sling structure and the steel bar component are in a taut state, the hydraulic system is started, and all telescopic cylinders 6 are gradually contracted according to the increasing pressure until the weight of all telescopic cylinders 6 and the steel bar component is balanced, the action of the telescopic cylinders 6 is stopped, and then the screws 7 in the sling structure are manually fixed one by one on the corresponding lower end ear plate 502 (locking nuts can be locked);

[0102] A5. Operate the tower crane to hoist the steel bar component as a whole to the installation position. According to the aerial posture of the steel bar component, adjust the control posture of the steel bar component through four groups of hydraulic jacks 101 and rotary motors 202. After meeting the installation requirements, lower the lifting device so that there is a 20 cm interval between the steel bar component on the lifting device and the installed steel bar component. Stop lowering further, and synchronously lower the steel bar component through four groups of hydraulic jacks 101. Gradually put the main reinforcement of the steel bar component into the guide bell mouth on the installed steel bar component to achieve precise alignment and installation.

[0103] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A flexible lifting device for lifting steel bar parts, characterized by: include, A suspension beam (1), wherein the suspension beam (1) is fixedly connected to a tower motor pulley block; Four sets of hydraulic adjustment structures, the upper ends of which are respectively fixed to the four corners of the suspension beam (1) for adjusting the inclination angles of the steel bar components in the X and Y directions and adjusting the height in the Z direction; A slewing support beam (2), wherein the slewing support beam (2) is connected to the lower ends of the four groups of hydraulic positioning structures; A slewing structure, the slewing structure is installed on the slewing support beam (2) and is used to drive the steel bar component to rotate around the Z axis; A revolving cross beam (3), the middle of which is connected to the revolving structure; A support bracket (4), wherein the support bracket (4) is fixedly connected to the lower end surface of the rotating cross beam (3), and a plurality of position-adjustable suspension points are arranged on the support bracket (4); A plurality of sling structures, wherein the sling structures correspond to the sling points one by one, the upper ends of the sling structures are connected to the sling points, and the lower ends of the sling structures are used to connect the steel bar components; A hydraulic balancing structure is provided on the sling structure and is used for vertically adjusting the sling structure to balance the pressure at all sling points.

2. A flexible lifting device for lifting steel bar parts according to claim 1, characterized in that: The hydraulic balance structure comprises: A bracket (5), wherein an upper end ear plate (501) and a lower end ear plate (502) of the bracket (5) are respectively fixedly connected to the sling structure; A telescopic oil cylinder (6), wherein the shell of the telescopic oil cylinder (6) is fixed on the bracket (5), and the piston end of the telescopic oil cylinder (6) can be telescoped in the vertical direction; A screw rod (7), the upper end of which is fixed to the piston end of the telescopic oil cylinder (6), and the lower end of which passes through the lower end ear plate (502) of the bracket (5) and is connected to the sling structure; All telescopic cylinders (6) on the support bracket (4) are connected in series and controlled by the same hydraulic system; the screw rod (7) is fixed to the lower end ear plate (502) through a locking nut after the telescopic cylinder (6) and the steel bar component are balanced in weight.

3. A flexible lifting device for lifting steel bar parts as claimed in claim 2, characterized in that: The sling structure comprises: An upper basket bolt (8), the upper end of which is connected to a hanging point on the support bracket (4), and the lower end of which is vertically adjustable and connected to an upper ear plate (501) of the bracket (5); A sling (9), the upper end of which is connected to a Y-shaped joint (11) at the lower end of the screw rod (7) via a latch; A lower turnbuckle bolt (10), the upper end of which is connected to the lower end of the sling (9), and the lower end of which is used to be connected to a steel bar component.

4. A flexible lifting device for lifting steel bar parts according to claim 1, characterized in that: The support bracket (4) comprises: A lower hanging frame, wherein the lower hanging frame is a frame structure fixed to the lower end of the rotating cross beam (3); An upper hanging frame, the upper hanging frame comprising a plurality of I-beams (401) and threaded steel bars (402) passing through the I-beams (401); The threaded steel bar (402) is fixed on the lower hanging frame, and a locking nut is passed through the threaded steel bar (402); the I-beam (401) is passed through the threaded steel bar (402) in an adjustable manner and is fixed to the threaded steel bar (402) through the locking nut after the position adjustment is completed, and each I-beam (401) is arranged with a plurality of hanging points.

5. A flexible lifting device for lifting steel bar parts as claimed in claim 4, characterized in that: The lower hanging frame comprises a plurality of supporting beams (403), and the plurality of supporting beams (403) are arranged in a crisscross manner to form a crisscross-shaped frame structure corresponding to the steel bar components.

6. A flexible lifting device for lifting steel bar parts as claimed in claim 5, characterized in that: The support beam (403) is provided with a plurality of I-beams (401) intersecting vertically; and hanging points are arranged at both ends of the I-beams (401) beyond the corresponding support beams (403).

7. A flexible lifting device for lifting steel bar parts according to claim 1, characterized in that: The hydraulic positioning structure comprises: A hydraulic jack (101), the upper end of the hydraulic jack (101) being connected to the suspension beam (1) via a pin; A lifting steel strand (102), wherein the upper end of the lifting steel strand (102) is fixedly connected to the lower end of the hydraulic jack (101); The steel strand anchor head (103) is fixedly connected to the lower end of the lifting steel strand (102), and the steel strand anchor head (103) is fixedly connected to the slewing support cross beam (2) via a pin shaft.

8. A flexible lifting device for lifting steel bar parts as claimed in claim 6, characterized in that: The rotary structure comprises: A slewing bearing (201), wherein the inner ring of the slewing bearing (201) is fixed to the lower end surface of the slewing support beam (2), and the outer ring of the slewing bearing (201) is fixed to the main beam (3); A plurality of rotary motors (202) are installed on a rotary support beam (2). The rotary motors (202) are transmission-connected to the outer ring of a rotary bearing (201) via a rotary gear (203).

9. A method for hoisting steel bar components, characterized in that: The flexible lifting device for lifting steel bar parts as claimed in any one of claims 2 to 8 is used, comprising the following steps: S1. Adjust the position of the hanging point on the support bracket according to the hanging point size of the steel bar component; S2. Operate the tower crane to move the lifting device to the top of the steel bar component, and adjust the lifting device to a horizontal state and a suitable angle through four sets of hydraulic adjustment structures and a rotary structure; S3. Lower the slings through four sets of hydraulic adjustment structures to connect the sling structure with the lifting points of the steel bar components; S4. Adjust all the sling structures through the hydraulic balance structure to balance the lifting weight of the steel bar components by all the sling structures, and then fix the sling structures; S5. Operate the tower crane to lift the steel bar component as a whole to the installation position, adjust the aerial posture of the steel bar component through four sets of hydraulic adjustment structures and rotating structures, lower the steel bar component as a whole to the installation position, and realize the in-place installation.

10. A method for hoisting steel bar components according to claim 9, characterized in that: In step S4, the method for adjusting all the sling structures through the hydraulic balancing structure includes: starting the telescopic cylinders in all the hydraulic balancing structures, gradually shrinking the telescopic cylinders until the lifting weight of the steel bar parts is balanced, fixing the screws in all the hydraulic balancing structures on the lower end ear plates of the bracket by locking nuts, and unloading all the telescopic cylinders.

Images