A jacking sleeve device and method for increasing or decreasing the center of rotation of a standard knot and a tower crane

Abstract

The present application relates to the technical field of tower cranes, and discloses a jacking sleeve device for increasing or decreasing the rotary center standard section, a method and a tower crane. The sleeve device comprises a jacking sleeve and a jacking frame, the jacking sleeve and the jacking frame are sleeved outside the standard section, the jacking sleeve is located above the jacking frame, an oil cylinder is arranged between the jacking sleeve and the jacking frame and is connected to drive axial movement, jacking pins are arranged on the top cross beams of the jacking sleeve and the jacking frame, an embedded hole is arranged on a standard section column, the jacking pins are connected to the embedded hole in a pin joint manner, can bear vertical force and unbalanced moment, does not need to additionally install a pin shaft, the embedded hole is not protruded outside the standard section frame, and the jacking operation is convenient, the connection is reliable, and the structure is compact.

Description

Technical Field

[0001] This application relates to the field of tower crane technology, and in particular to a lifting frame device, method, and tower crane for adding or removing standard sections at the slewing center. Background Technology

[0002] Tower cranes are essential lifting equipment in construction, widely used for material hoisting operations in high-rise buildings, bridges, power plants, and other projects. As building height increases, tower cranes need to use jacking devices to increase their own height to meet the operational needs of different construction stages.

[0003] CN201325833Y discloses a lifting anti-detachment device for a self-erecting tower crane. This design involves setting pin holes between the lifting beam fixing block and the standard section support block, forming a pin connection through an anti-detachment pin. However, the arc groove fit between the lifting pin and the standard section support block in this design still presents a safety hazard as the pin can easily roll off the arc groove. Furthermore, the support block structure protrudes beyond the standard section frame, interfering with the normal movement and installation of the standard section.

[0004] CN102583170B discloses a self-erecting tower crane and its jacking mechanism. This design includes a jacking beam, pins, and standard section steps connected to a standard section of the tower. The pins are sequentially inserted into pin holes on the first and second connecting parts on the side of the jacking beam, with the outer end of the pins engaging with the standard section steps. However, this design requires additional installation and fixing of the pins during the jacking process, making the operation cumbersome and labor-intensive. Furthermore, the standard section steps protrude beyond the standard section frame, affecting the overall structural compactness of the standard section. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a jacking frame device, method, and tower crane for adding or removing standard sections at the slewing center. This solves the problems of existing technologies where additional fixing pins are required during the jacking process, resulting in cumbersome operation, high labor intensity, and the need to improve the connection stability of the jacking device.

[0006] This invention is achieved through the following scheme: A lifting sleeve device for adding or removing standard sections at a slewing center includes a lifting sleeve and a lifting frame. Both the lifting sleeve and the lifting frame are fitted onto the outside of the standard section, with the lifting sleeve positioned above the lifting frame. A hydraulic cylinder connects the lifting sleeve and the lifting frame. The hydraulic cylinder extends and retracts, driving the lifting sleeve to move axially relative to the lifting frame along the standard section. A lifting pin is provided on the top crossbeam of the lifting sleeve; a lifting pin is also provided on the top crossbeam of the lifting frame; an embedded hole is provided on the column of the standard section; the lifting pins of the lifting sleeve and the lifting frame are pinned to the embedded holes of the standard section. The device also includes a slewing platform with four legs at its bottom, which are connected to a sleeve connector at the top of the lifting sleeve. Pull-out locking mechanisms are provided on the sides of the legs. Preferably, the embedded holes are respectively located at the top, middle, and bottom of the side of the standard section column; Preferably, the recessed hole at the top of the column is located at the lower part of the top connector of the standard section, and the recessed hole at the midpoint of the column height is located at the support convergence point of the frame truss.

[0007] Preferably, the embedded hole at the midpoint is formed by a reinforcing plate, which is set in the groove of the standard section column. The reinforcing plate is welded and fixed in the groove of the standard section frame, and the outer surface of the reinforcing plate does not exceed the outer surface of the standard section column.

[0008] Preferably, the top crossbeam of the lifting frame is provided with four lifting pins along the four positive directions; the top crossbeam of the lifting frame is provided with four lifting pins along the four positive directions.

[0009] Preferably, the lifting frame is surrounded by a working platform, and the working platform has a square passage in the middle for the standard section to pass through.

[0010] Preferably, the locking element is connected to the bottom of the rotating platform through the locking channel. The locking element can slide or be fixed within the locking channel. The locking element is pinned to the connector at the top of the standard section through the locking channel.

[0011] Preferably, both the lifting sleeve and the inner side of the lifting frame are equipped with rollers to assist in moving up and down along the standard section.

[0012] A jacking method for adding or removing standard sections at the center of rotation, employing a jacking frame device for adding or removing standard sections at the center of rotation, includes the following steps: Insert the lifting pin of the lifting sleeve into the corresponding embedded hole of the standard section to put the lifting sleeve into a state of being lifted under force. Pull out the locking fasteners of the slewing platform to clear the central passage of the slewing platform; hoist the standard section to be installed and install it in place by passing it through the central passage of the slewing platform; The retracting cylinder lifts the lifting frame to a position close to the installation position of the lifting sleeve, and inserts the lifting pin of the lifting frame into the corresponding embedded hole of the standard section, so that the lifting frame is in a state of being lifted under force. Start the hydraulic cylinder to extend and pull out the lifting pin of the lifting sleeve. The hydraulic cylinder continues to lift to the corresponding inner hole position of the upper standard section. Then, insert the lifting pin of the lifting sleeve into the inner hole so that the lifting sleeve is back in the force-lifting state. Pull out the lifting pin of the lifting frame, retract the hydraulic cylinder to lift the lifting frame to the next lifting pin installation position, insert the lifting pin of the lifting frame into the corresponding inner hole, so that the lifting frame is back in the state of being lifted by force. When lifting multiple sections, repeat the above steps; After the lifting is completed, push in and fix the locking parts of the slewing platform, and pin the end to the top connector of the standard section.

[0013] A tower crane employs a jacking frame device that adds or removes standard sections at the center of rotation. It also includes a tower body composed of several standard sections connected sequentially; a slewing platform installed above the jacking frame, with four legs at the bottom, the legs being pinned to the frame connectors at the top of the jacking frame; pull-out locking devices on the sides of the legs, the locking devices being pinned to the connectors at the top of the standard sections; a square passageway in the middle of the slewing platform for the standard sections to pass through; a boom connected to the slewing platform; and a counterweight boom connected to the slewing platform and positioned opposite the boom.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: By setting lifting pins on the top crossbeams of the lifting sleeve and lifting frame, forming a pin-fit with the embedded holes on the standard section column, this pin-fit structure can bear the upward or downward vertical force and a certain unbalanced torque. During the lifting process, there is no need to install additional fixing pins, which solves the problem of cumbersome operation and high labor intensity caused by the need to install additional pins in the existing technology, and significantly improves the efficiency of lifting operations.

[0015] By setting embedded holes in the steel channel of the column, the connection does not protrude outward from the standard section frame, thus avoiding the problem of the connection structure protruding outward and interfering with the normal movement and installation of the standard section in the existing technology.

[0016] By alternating force between the lifting sleeve and the lifting frame, and with the cyclic lifting of the hydraulic cylinder, continuous lifting operation of the lifting device is achieved. The entire lifting process is simple in structure, convenient in operation, safe and reliable, and is suitable for lifting and adding sections of various tower cranes. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the lifting device of the present invention.

[0018] Figure 2 This is a schematic diagram of the lifting frame and working platform of the present invention.

[0019] Figure 3 This is a schematic diagram of the lifting frame structure of the present invention.

[0020] Figure 4 for Figure 1 A magnified schematic diagram of the lifting pin at point C, where the left side shows the state under stress and the right side shows the state without stress.

[0021] Figure 5 for Figure 2 Enlarged schematic diagram of the connection between the mounting bracket at point B and the operating platform.

[0022] Figure 6 This is a schematic diagram showing the connection between the rotating platform and the standard section of the present invention.

[0023] Figure 7 This is a schematic diagram of the assembly of the rotary platform, lifting frame, and standard section of the present invention.

[0024] Figure 8 This is a side view of the lifting sleeve and standard section of the present invention in the assembled and locked state.

[0025] Figure 9 This is a schematic diagram of the minimum stroke state of the jacking frame and standard section assembly in a preferred embodiment of the present invention.

[0026] Figure 10 This is a schematic diagram of the maximum stroke state of the jacking sleeve and standard section assembly in a preferred embodiment of the present invention.

[0027] Figure 11 This is a partially enlarged schematic diagram of the locking mechanism, where the left side shows the locking mechanism in the pushed-in state and the right side shows the locking mechanism in the pulled-out, lifted state.

[0028] Figure 12 This is a schematic diagram of the overall structure of a luffing jib tower crane.

[0029] Figure label: 1-Lifting frame; 131-Reinforcing crossbeam; 132-Supporting crossbar; 133-Diagonal brace; 134-Short crossbar; 2-Lifting frame; 3-Hydraulic cylinder; 4-Lifting pin; 41-First lifting pin; 42-Second lifting pin; 43-Locking element; 44-Locking hole; 5-Inset hole; 5a-Top embedded hole; 5b-Middle embedded hole; 6-Frame connector; 7-Locking fastener; 71-Locking channel; 8-Slewing platform; 81-Outriggers; 9 - Standard section; 91 - Top connector; 9A - Upper standard section; 9B - Middle standard section; 9C - Lower standard section; 10-Working platform; 11-Square passageway; 12-Roller; 13-Reinforced structure; 14-Boom; 15-Balance boom; 16-A-support; 17-Hanging seat. Detailed Implementation

[0030] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0031] Any feature disclosed in this specification (including any appended claims and abstract) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0032] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0033] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0034] This application provides a lifting frame device, method, and tower crane for adding or removing standard sections at the center of rotation. By setting lifting pins on the top crossbeams of the lifting frame and lifting frame, forming a pin-fit with the embedded holes on the standard section columns, it solves the technical problems of interference from protruding connection structures, easy detachment of pins, and cumbersome operation in the prior art. The application will be further described in detail below with reference to the accompanying drawings.

[0035] like Figures 1-8 As shown, a lifting sleeve device for adding or removing standard sections at a slewing center is provided, including a lifting sleeve 1, a lifting frame 2, a hydraulic cylinder 3, and a standard section 9. The lifting sleeve 1 and the lifting frame 2 are sleeved on the outside of the standard section 9 and connected by the hydraulic cylinder 3. The hydraulic cylinder 3 extends and retracts to drive the lifting sleeve 1 to move axially relative to the lifting frame 2 along the standard section 9, with the lifting sleeve 1 located above the lifting frame 2.

[0036] The lifting frame 1 consists of four square-section columns, with multiple horizontal beams and diagonal braces forming a spatial frame structure. Each of the four corner columns has a frame connector 6 at its top for connection to the support legs 81 of the rotating platform 8. The frame connector 6 is a double-eared plate with upward-protruding tabs and horizontal through holes for fixing to the support legs 81 with pins. On the sides of the frame connector 6, each of the four top horizontal beams has a first lifting pin 41, located near the four corners of the lifting frame 1, corresponding to the positions of the columns in the standard section 9. The side frame connecting the lifting frame 1 to the hydraulic cylinder 3 extends outwards to form a side frame reinforcement structure 13. Figure 3 As shown, the reinforcing structure 13 includes an outwardly protruding reinforcing beam 131, a supporting crossbar 132 in the middle of the side frame, and diagonal braces 133 connecting the supporting crossbar 132 and the two side columns. The reinforcing beam 131 is fixed to the outside of the short crossbar 134. The short crossbar 134 has a gap in the middle to allow the hydraulic cylinder to pass through, so that the hydraulic cylinder 3 can be vertically hinged to the main frame. The reinforcing beam 131 moves outward to make room while restricting the movement space of the hydraulic cylinder, ensuring that the hydraulic cylinder 3 is vertically stable. The top of the hydraulic cylinder is connected to the bottom of the supporting crossbar 132 as the upper support point, and the bottom extends downward to connect with the lifting frame. Hanging seats are provided on the four columns for engaging or fixing the externally connected work platform 10.

[0037] like Figure 2 As shown, the frame structure of the lifting frame 2 is a spatial truss structure composed of four square-section columns, beams and diagonal braces. Similarly, a second lifting pin 42 is provided on each of the four top beams, which corresponds to the first lifting pin 41 in position and direction. The bottom end of the hydraulic cylinder 3 is hinged to the support point of the top beam of the lifting frame 2.

[0038] like Figures 1-5 As shown, each lifting pin 4 is composed of a double-ear bracket and a pin shaft. The lifting direction of each lifting pin 4 is towards the inside of the frame. The axial direction of each pin shaft is perpendicular to the frame mounting surface and faces one of the four positive directions. The outer end of the pin shaft is fitted with a locking piece 43, and the inner end is a stepped shaft. The large diameter section of the stepped shaft is provided with a locking hole 44. The four columns of the lifting sleeve 1 and the lifting frame 2 are all provided with equally positioned hanging seats 17 for engaging or fixing the externally connected work platform 10. like Figures 6-8As shown, the standard section 9 frame structure is a spatial truss structure composed of four H-shaped cross-section columns, beams, and diagonal braces. The columns are made of H-shaped steel, and the slot openings on one side of the four H-shaped columns face the four positive directions respectively, matching the position and extension direction of the lifting pins of the lifting sleeve 1 and the lifting frame 2. The top of the H-shaped column is equipped with a top connector 91 that connects to the previous standard section. The top connector 91 has a protruding lug and a pin on the upper part, and is fixed to the top of the H-shaped column at the lower part. The bottom of the H-shaped column is equipped with a pin hole for insertion with the pin of the top connector 91 of the next standard section. The H-shaped column has an embedded hole 5. In a preferred embodiment, the embedded hole 5 can be formed by a reinforcing plate. Since the H-shaped column has a groove, the reinforcing plate is a perforated steel plate fixed in the groove by welding. The outer surface of the reinforcing plate is flush with or does not exceed the outer surface of the column to avoid interference with the normal movement and installation of the standard section. The through hole on the reinforcing plate is the embedded hole 5, and the diameter of the embedded hole 5 matches the diameter of the lifting pin. The standard section frame is also provided with multiple wheel grooves, which correspond to the path of the rollers when the lifting sleeve or the inner wall of the lifting frame moves.

[0039] like Figures 8-10 As shown, in a preferred embodiment, the embedded holes 5 are respectively located at the top, middle, and bottom of the groove surface of the standard section 9 column. Specifically, the first location is at the top connector 91 of the column, where the lower part of the top connector 91 is fixed to the top of the column and has a top embedded hole 5a. The second location is at the middle point of the column height, where the middle embedded hole 5b is located behind the frame support point. The horizontal and diagonal bars form a support convergence point in the middle of the column, which has high structural strength. The embedded hole 5b is located on the back side of this location to ensure reliability. It should be noted that the embedded hole 5 at the bottom of the standard section 9 column is also the embedded hole 5a at the top of the lower standard section 9C, since the lower standard section 9C is connected to the bottom pin hole of the middle standard section 9B through the top connector 91 when the upper and lower standard sections are installed and connected.

[0040] The lifting pin 4 is inserted into the inner hole 5, and the lifting pin 4 and the inner hole 5 of the standard section 9 form a pin connection. The lifting pin 4 is in a state of being lifted under force. When the lifting pin 4 is pulled out from the inner hole 5, the lifting sleeve 1 or the lifting frame 2 is disconnected from the standard section 9, and the lifting pin 4 is in a state of being lifted without force.

[0041] In a preferred embodiment, when the first lifting pin 41 of the lifting sleeve 1 is inserted into the inner hole 5a of the middle standard section 9B, the lifting frame 2 retracts to the bottom of the lifting sleeve 1, and the position of its second lifting pin 42 corresponds to the inner hole 5a of the lower standard section 9C, forming a pin-fit. This is the minimum stroke of the hydraulic cylinder. When the hydraulic cylinder is lifted to its maximum stroke, the position of the first lifting pin 41 corresponds to the inner hole 5b of the upper standard section 9A. This ensures that the top connector 91 of the upper standard section 9A is above the level of the square channel 11, allowing for normal installation and section addition. Since the lifting pin 4 and the inner hole 5 can both form a pin-fit fixation, no additional fixing pin is required during the lifting process, simplifying the operation.

[0042] This embodiment, based on the above embodiment, further illustrates the connection structure between the rotating platform 8 and the standard section 9, such as... Figures 6-8 As shown, the bottom of the rotary platform 8 is provided with four support legs 81. On the bottom of the rotary platform 8 and on one side of each support leg 81, there are locking channels 71. The locking channels 71 are set inward from four positive directions. The inner end of each locking channel 71 corresponds to the fixing position of a standard section 9 column. The locking component 7 is pinned to the top connector 91 of the standard section 9 through the locking channel 71 at the fixing position to realize the stable fixing of the rotary platform 8 and the standard section 9.

[0043] like Figure 11 As shown, the locking element 7 is a pull-out plate with a latch at the front end, which slides or is fixed horizontally within the locking channel 71. The side wall of the locking channel 71 has an opening, and the locking element 7 body also has a corresponding hole. When the locking element 7 is pushed into the working position, its front end engages with the protruding lug of the top connector 91, and a pin is inserted to secure the locking element 7 to the top connector 91. The opening on the side wall of the locking channel 71 aligns with the locking hole on the locking element 7 body, and the pin is inserted to lock the locking element 7 in the pushed-in state, preventing it from accidentally sliding out during use.

[0044] In the lifting state, remove the pin, pull out the locking part 7, and the end of the locking part 7 disengages from the top connector 91 of the standard section 9, making way for the square channel 11 in the middle of the rotary platform 8. At this time, the standard section 9 can pass through the square channel 11 in the middle of the rotary platform 8, which facilitates the hoisting of new standard sections 9 for section addition operations.

[0045] The support legs 81 of the rotary platform 8 are fixedly connected to the frame connector 6 at the top of the lifting frame 1 by a pin. The bottom of the support legs 81 is provided with a connecting hole, and the frame connector 6 is provided with a corresponding pin hole. The support legs 81 and the frame connector 6 are fixedly connected by inserting a pin. This connection method allows the weight of the rotary platform 8 to be transferred to the lifting frame 1 through the support legs, and then from the lifting frame 1 to the standard section 9 through the lifting pin 4.

[0046] In addition, a working platform 10 is also stacked on the rotary platform 8. The working platform 10 is connected to the rotary platform by a fixing kit, and a square channel 11 is left in the middle of the fixing kit.

[0047] This embodiment provides a method for lifting a tower crane, using the lifting device described in the above embodiment to lift the tower crane section by section. Figures 1 to 11 As shown, the rotary platform 8 is connected to the lifting frame 1 via the support legs 81 to maintain stability, and the locking fastener 7 is pushed into the working position. Before lifting, the lifting pin 4 of the lifting frame 1 is inserted into the corresponding inner hole 5a of the standard section 9, and the lifting frame 1 is in a state of being lifted under force. At this time, the lifting frame 1 supports the weight of the rotary platform 8 and the upper structure. The retracting cylinder 3 is moved to the installation position of the lifting frame 2, and the lifting frame 2 rises to the position of the corresponding inner hole 5a of the standard section 9 below the lifting frame 1 to insert the lifting pin 4. At this time, the lifting frame 2 and the standard section 9 form a reliable connection.

[0048] During the jacking and adding of sections, the boom 14 is used to hoist the standard section 9 to be installed and position it above the square channel in the middle of the slewing platform 8. The standard section 9 to be installed is lowered until it aligns with the top connector 91 of the standard section 9 already installed below and is then connected and secured. Then, the locking fastener 7 of the slewing platform 8 is pulled outward to clear the square channel in the slewing platform 8. After the locking fastener 7 is pulled out, the pin connection between the slewing platform 8 and the top connector 91 of the standard section 9 is disengaged, but the slewing platform 8 remains stable by being connected to the jacking frame 1 through the outriggers 81.

[0049] Pull out the lifting pin 4 of the lifting sleeve 1, allowing the standard section 9 to move relative to the lifting sleeve 1. Start the hydraulic cylinder 3 to extend, pushing the lifting sleeve 1 upwards, causing the rotary platform 8 and the upper working platform 10 to rise together, and the lifting frame 2 to be under load. After the hydraulic cylinder 3 extends one stroke height, the lifting sleeve 1 reaches the corresponding inner hole 5 of the upper-level standard section 9 and inserts the lifting pin 4. The lifting sleeve 1 is then back in a loaded lifting state, and at this time, the lifting sleeve 1 is reliably connected to the standard section 9 again. In a preferred embodiment, this stroke height is 1.5m, the height of one standard section.

[0050] Pull out the lifting pin 4 of the lifting frame 2, disengaging the lifting frame 2 from the standard section 9; retract the hydraulic cylinder 3, and the lifting frame 2 rises with the hydraulic cylinder 3 to the next lifting pin installation position, inserting the lifting pin 4 into the corresponding height's recessed hole 5, and the lifting frame 2 is once again in a force-driven lifting state. This completes one lifting cycle, and the standard section 9 and the rotating platform 8 rise one stroke height.

[0051] When multiple standard sections 9 need to be lifted, repeat the above-described cycle of lifting standard sections, retracting and resetting the hydraulic cylinders, and extending the hydraulic cylinders to lift. Each cycle increases the height of the tower crane by one standard section 9, and multiple cycles can achieve continuous heightening of the tower crane.

[0052] After the lifting is completed, the locking fastener 7 of the rotary platform 8 is pushed inward, and the end of the locking fastener 7 is pinned to the top connecting piece 91 of the standard section 9. The rotary platform 8 returns to its working state and forms a stable connection with the standard section 9, which can withstand normal working loads. The lifting method in this embodiment achieves cyclic lifting by the hydraulic cylinder 3 through the alternating force cooperation of the lifting sleeve 1 and the lifting frame 2.

[0053] Throughout the lifting process, the pin connection between the lifting pin 4 and the embedded hole 5 eliminates the need for additional pins, simplifying operation. Since the embedded hole 5 does not protrude beyond the standard section 9 frame, it does not interfere with the normal movement and installation of the standard section 9. The hydraulic cylinder 3, connected to the side frame reinforcement structure 13 of the lifting sleeve 1, ensures the stability of the vertical force on the upper and lower supports. The pull-out design of the locking fastener 7 makes the connection and separation of the rotating platform 8 and the standard section 9 flexible and convenient.

[0054] This embodiment provides a luffing jib tower crane, which employs the jacking frame device described in the above embodiment, such as... Figure 12 As shown.

[0055] The luffing jib tower crane includes a tower body, a jacking device, a slewing platform 8, a luffing jib 14, and a counterweight jib 15. The tower body is composed of several standard sections 9 connected sequentially, with embedded holes 5 on the columns of each standard section 9. The jacking device is fitted around the tower body and includes a jacking sleeve 1, a jacking frame 2, and a hydraulic cylinder 3. The jacking sleeve 1 and the jacking frame 2 are connected by the hydraulic cylinder 3, which drives the jacking sleeve 1 to move axially relative to the jacking frame 2 along the standard section 9. The slewing platform 8 is installed above the jacking sleeve 1. The bottom of the slewing platform 8 has four legs 81, which are fixed to the sleeve connector 6 at the top of the jacking sleeve 1 with pins. The legs 81 have pull-out locking channels for locking fasteners 7. The openings on the side walls of the locking channels correspond to the locking holes on the body of the locking fasteners 7. When pushed into the working position, a pin is inserted to lock the locking fasteners 7. The slewing platform 8 has a square channel 11 in the middle for the standard sections 9 to pass through. The boom 14 is connected to the slewing platform 8, and the counterweight boom 15 is connected to the slewing platform 8 and is set opposite to the boom 14 via support A 16.

[0056] This luffing jib tower crane, by adopting the aforementioned frame device, has the advantages of convenient jacking operation, reliable connection, and compact structure, and is suitable for adding or removing standard sections at the center of rotation.

[0057] In this application, the four positive directions refer to the four mutually perpendicular orthogonal orientations established relative to the central axis of the standard section frame. These four orientations correspond to the four sides of the spatial frame structure, namely the front, rear, left, and right sides.

[0058] It is understandable that the number of lifting pins 4 is not limited to four, but can also be six or eight, and is not limited to only the top crossbeam, as long as it can achieve the docking position with the embedded hole 5 of the standard section, so as to ensure a reliable connection between the lifting sleeve 1 or the lifting frame 2 and the standard section 9.

[0059] It is understandable that the location of the embedded hole 5 is not limited to the top, middle, and bottom of the column; embedded holes 5 can also be added at other heights of the column as needed. The number and arrangement of the rollers 12 can be adjusted according to actual needs to achieve the best guiding and supporting effect. Obviously, the cylinder 3 is not limited to a hydraulic cylinder; it can also be a pneumatic cylinder or an electric push rod, or other types of drive devices.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A jacking frame device for adding or removing standard sections at a slewing center, characterized in that, The system includes a lifting frame (1) and a lifting frame (2), both of which are fitted onto the outside of the standard section (9). The lifting frame (1) is connected to the bottom of the rotating platform (8), and the standard section (9) passes through the middle of the rotating platform (8). The bottom of the rotating platform (8) is provided with four legs, which are connected to the frame connector (6) at the top of the lifting frame (1). The legs are provided with pull-out locking fasteners (7). The lifting sleeve (1) is located above the lifting frame (2), and a hydraulic cylinder is provided between the lifting sleeve (1) and the lifting frame (2); the hydraulic cylinder (3) drives the lifting sleeve (1) to move relative to the lifting frame (2) along the axial direction of the standard section (9); the lifting sleeve (1) has a lifting pin (4) on its crossbeam; the lifting frame (2) has a lifting pin (4) on its crossbeam; the standard section (9) has an embedded hole (5) on its column; the lifting pin (4) of the lifting sleeve (1) is pinned to the embedded hole (5) of the standard section (9), and the lifting pin (4) of the lifting frame (2) is pinned to the embedded hole (5) of the standard section (9).

2. The jacking frame device for adding or removing standard sections at the center of rotation according to claim 1, characterized in that, The embedded holes (5) are respectively located at the top, middle and bottom of the side of the standard section (9) column.

3. The jacking frame device for adding or removing standard sections at the center of rotation according to claim 1, characterized in that, The recessed hole (5) at the top of the column is located at the lower part of the top connector (91) of the standard section, and the recessed hole (5) at the midpoint of the column height is located at the support convergence point of the frame truss.

4. The jacking frame device for adding or removing standard sections at the center of rotation according to claim 2, characterized in that, The embedded hole (5) at the midpoint is formed by a reinforcing plate, which is set in the groove of the standard section (9) column. The reinforcing plate is welded and fixed in the groove of the standard section (9) frame. The outer surface of the reinforcing plate does not exceed the outer surface of the standard section (9) column.

5. The jacking frame device for adding or removing standard sections at the center of rotation according to claim 1, characterized in that, The top beam of the lifting frame (1) is provided with four first lifting pins (41) along the four positive directions; the top beam of the lifting frame (2) is provided with four second lifting pins (42) along the four positive directions; the corresponding positions and directions of the first lifting pins (41) and the second lifting pins (42) are consistent.

6. The jacking frame device for adding or removing standard sections at the center of rotation according to claim 1, characterized in that, The lifting frame (2) is surrounded by a working platform (10), and the working platform (10) has a square channel (11) in the middle for the standard section (9) to pass through.

7. The jacking frame device for adding or removing standard sections at the center of rotation according to claim 1, characterized in that, The locking member (7) is connected to the bottom of the rotating platform (8) through the locking channel. The locking member (7) can slide or be fixed in the locking channel. The locking member (7) is pinned to the connector at the top of the standard section (9) through the locking channel.

8. A jacking frame device for adding or removing standard sections at the center of rotation according to claim 1, characterized in that, Both the lifting frame (1) and the lifting frame (2) are provided with rollers (12) on their inner sides to assist in moving up and down along the standard section (9).

9. A method for lifting standard sections for adding or removing slewing centers, employing the lifting frame device for adding or removing standard sections for slewing centers as described in any one of claims 1-8, characterized in that, Includes the following steps: Insert the lifting pin (4) of the lifting sleeve (1) into the corresponding inner hole (5) of the standard section (9) so that the lifting sleeve (1) is in a state of being lifted under force; Pull out the locking fastener (7) of the slewing platform (8) to make room for the middle channel of the slewing platform (8); hoist the standard section (9) to be installed and install it through the middle channel of the slewing platform (8); The retracting cylinder (3) lifts the lifting frame (2) to the installation position close to the lifting sleeve (1), and inserts the lifting pin (4) of the lifting frame (2) into the corresponding inner hole (5) of the standard section (9), so that the lifting frame (2) is in a state of being lifted under force. Start the hydraulic cylinder (3) to extend and pull out the lifting pin (4) of the lifting sleeve (1). The hydraulic cylinder (3) continues to lift to the corresponding inner hole (5) of the upper standard section (9). Then, insert the lifting pin (4) of the lifting sleeve (1) into the inner hole (5) so that the lifting sleeve (1) is in the state of being lifted by force again. Pull out the lifting pin (4) of the lifting frame (2), retract the oil cylinder (3) to lift the lifting frame (2) to the next lifting pin installation position, insert the lifting pin (4) of the lifting frame (2) into the corresponding inner hole (5), so that the lifting frame (2) is in the state of being lifted by force again; When lifting multiple sections, repeat the above steps; After the lifting is completed, push in and fix the locking parts (7) of the slewing platform (8), and pin the end to the top connector of the standard section (9).

10. A tower crane, employing the jacking frame device for adding or removing standard sections at the slewing center as described in any one of claims 1-8, characterized in that, It also includes a tower body, which is composed of several standard sections (9) connected in sequence; a slewing platform (8), which is installed above the lifting frame (1) and has four legs at the bottom. The legs are fixed with the frame connector (6) at the top of the lifting frame (1) by pins. The legs are provided with pull-out locking fasteners (7), which are pinned to the connectors at the top of the standard sections (9). The slewing platform (8) has a square channel (11) in the middle for the standard sections (9) to pass through; a lifting boom, which is connected to the slewing platform (8); and a counterweight boom (15), which is connected to the slewing platform (8) and is set opposite to the lifting boom.

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