Adjustable joint of hoisting sling

Abstract

By arranging the main suspender, the mechanical lock ingot, the frame type main beam, the hydraulic nut, the auxiliary beam and the lifting bolt, the problems that when large pieces are hoisted and leveled by adjusting the length of a suspender, adjusting the number of threads of a suspender screw rod and adjusting the length of a turn buckle, a bridge crane needs to drop the large pieces, and adjustment can be carried out after the load of the suspender is unloaded are solved, the operation is complex, and the work efficiency is high are solved. And monitoring is difficult to implement in the adjusting process. The device is reasonable in design, the horizontal adjusting process is more time-saving and labor-saving through the stress conversion principle, and the whole large piece hoisting process is convenient to operate, high in reliability and higher in safety.

Description

Technical Field

[0001] The utility model relates to the technical field of hoisting tools, and particularly relates to an adjustable joint of a hoisting sling. Background Art

[0002] During the overhaul process of a hydro-generator set, a large amount of heavy object hoisting work is involved. During the hoisting operation of large components, it is necessary to level the large components to ensure the accuracy and safety of the hoisting process. At present, methods such as adjusting the length of the sling, adjusting the number of screw threads of the hoist screw, and adjusting the length of the turnbuckle are used to level the large components during hoisting. The process requires the bridge crane to lower the large component so that the hoisting tool can unload the load before adjustment can be carried out. Moreover, the adjustment operation is relatively complex, it is difficult to monitor the adjustment effect during the process, the large component needs to be lifted and lowered frequently many times, the manual consumption is large, the reliability of hoisting is poor, and there are certain safety risks. Content of the Utility Model

[0003] The utility model solves the problem that when leveling large components by adjusting the length of the sling, adjusting the number of screw threads of the hoist screw, and adjusting the length of the turnbuckle, it is necessary for the bridge crane to lower the large component, and the problem that adjustment can only be carried out after the hoisting tool unloads the load, the operation is complex, and it is difficult to monitor the adjustment process.

[0004] To solve the above problems, the present application is realized through the following technical solutions:

[0005] An adjustable joint of a hoisting sling includes a main boom. A lifting ring is provided at the upper end of the main boom, and a trapezoidal thread is provided on the outer wall of the lower end of the main boom. The trapezoidal thread is connected to a trapezoidal threaded hole of a frame-type main beam, and the frame-type main beam and the main boom are fixedly connected by mechanical locking;

[0006] A first through hole is provided at the lower end of the frame-type main beam. A secondary beam is installed inside the frame-type main beam. The upper load-bearing disc of the secondary beam is hung above a hydraulic nut, and a triangular threaded hole on the inner wall of the lower load-bearing disc of the secondary beam is threadedly connected to a lifting ring screw.

[0007] The main boom is spirally and fixedly connected to the inner wall of the mechanical locking, and the bottom end of the outer wall of the mechanical locking is fixedly connected to the frame-type main beam.

[0008] The frame-type main beam is provided with a trapezoidal threaded hole at the upper end.

[0009] A plurality of vertical ribs are installed inside the secondary beam. A reinforcing rib is welded at the transition angle between each vertical rib and the upper load-bearing disc and the lower load-bearing disc, and reinforcing ribs are welded on both sides of each vertical rib.

[0010] The hydraulic nut is also equipped with a piston.

[0011] On the upper and lower sides of the secondary beam, an upper load-bearing disc and a lower load-bearing disc are respectively installed. Multiple vertical ribs are welded to the upper load-bearing disc and the lower load-bearing disc. The upper end of each vertical rib is welded to the upper load-bearing disc through a reinforcing rib, and the lower end of each vertical rib is welded to the lower load-bearing disc through a reinforcing rib.

[0012] A second through-hole is provided at the center of the upper load-bearing disc of the secondary beam, and a triangular threaded hole is provided at the center of the lower load-bearing disc of the secondary beam.

[0013] The main suspension rod is sleeved in the second through-hole on the inner wall of the upper load-bearing disc of the secondary beam.

[0014] The lower end face of the upper load-bearing disc is attached and connected to the upper end face of the hydraulic nut.

[0015] Preferably, there are four vertical ribs.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] 1. The new device realizes load adjustment during the load-bearing process of the sling. The lifting tool does not need to unload the load and can also be adjusted.

[0018] 2. When the trapezoidal thread of the secondary beam and the main suspension rod is stressed, oil is filled into the hydraulic nut through a pump-driven device such as an ultra-high pressure hand pump, so that the piston of the hydraulic nut moves upward. The upper load-bearing disc of the secondary beam that fits with the hydraulic nut is gradually lifted under the drive of the piston of the hydraulic nut, and the lower load-bearing disc of the secondary beam is disengaged from the lower end of the box-type main beam. The load of the lifted workpiece is transmitted to the hydraulic nut through hydraulic pressure. At this time, the lifting tool is stressed through the main suspension rod, the upper load-bearing disc of the secondary beam, the hydraulic nut, and the lifting ring screw, and the box-type main beam is unloaded and in a rotatable free state. The device is reasonably designed, and the horizontal adjustment process is more time-saving and labor-saving through the principle of force conversion. The entire large-piece hoisting process is relatively convenient to operate, has strong reliability and higher safety.

[0019] 3. It can be applied to the construction of hoisting operations in the hydropower and related industries, and has good versatility and significant industry promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic cross-sectional structure diagram of the adjustable joint of the new load-adjustable lifting tool;

[0021] Figure 2 (a) is the front view of the main suspension rod 1,

[0022] Figure 2 (b) is the bottom view of the main suspension rod 1;

[0023] Figure 3 (a) is the front view of the box-type main beam 3,

[0024] Figure 3(b) is the left view of the box-shaped main beam 3,

[0025] Figure 3 (c) is the top view of the box-shaped main beam 3;

[0026] Figure 4 (a) is the front view of the auxiliary beam 5,

[0027] Figure 4 (b) is the left view of the auxiliary beam 5,

[0028] Figure 4 (c) is the top view of the auxiliary beam 5.

[0029] Reference numerals: main suspension rod 1, trapezoidal thread 101, lifting ring 102, mechanical locking 2, box-shaped main beam 3, trapezoidal threaded hole 301, first through hole 302, hydraulic nut 4, piston 401, auxiliary beam 5, second through hole 501, triangular threaded hole 502, upper load-bearing disc 503, lower load-bearing disc 504, vertical rib 505, reinforcing rib 506, lifting ring screw 6. Detailed implementation manners

[0030] It should be understood that the orientation or positional relationship indicated by terms such as "above", "upper end", "lower end", "bottom", "inside", "end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. The hydraulic nut 4 can also use a hollow jack or a super nut as an alternative. The parts not specifically described in this application are prior art, such as the mechanical locking 2 and the hydraulic nut 4 can be directly purchased from the market to obtain the matching models.

[0031] In addition, the descriptions in the present invention only relate to the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

[0032] Embodiment 1

[0033] This embodiment relates to the assembly and connection relationship of the load-adjustable lifting tool adjustable joint in the present invention,

[0034] Please refer to Figures 1 to 4, A lifting sling adjustable joint, including a main boom 1. A lifting ring 102 is provided at the upper end of the main boom 1. A trapezoidal thread 101 is provided on the outer wall of the lower end of the main boom 1. The trapezoidal thread 101 is connected to the trapezoidal thread hole 301 of the box-shaped main beam 3. The box-shaped main beam 3 and the main boom 1 are fixedly connected by a mechanical locking device 2. A first through hole 302 is provided at the lower end of the box-shaped main beam 3. A secondary beam 5 is installed inside the box-shaped main beam 3. The upper load-bearing disc 503 of the secondary beam 5 is hung above the hydraulic nut 4. The triangular thread hole 502 on the inner wall of the lower load-bearing disc 504 of the secondary beam 5 is threadedly connected to the eye bolt 6. The main boom 1 is spirally and fixedly connected to the inner wall of the mechanical locking device 2. The bottom end of the outer wall of the mechanical locking device 2 is fixedly connected to the box-shaped main beam 3. A trapezoidal thread hole 301 is provided at the upper end of the box-shaped main beam 3. Multiple vertical ribs 505 are installed inside the secondary beam 5. A reinforcing rib 506 is welded at the transition angle between each vertical rib 505 and the upper load-bearing disc 503 and the lower load-bearing disc 504. Reinforcing ribs 506 are welded on both sides of each vertical rib 505.

[0035] The upper and lower sides of the secondary beam 5 are respectively equipped with an upper load-bearing disc 503 and a lower load-bearing disc 504. Multiple vertical ribs 505 are welded to the upper load-bearing disc 503 and the lower load-bearing disc 504. The upper end of each vertical rib 505 is welded to the upper load-bearing disc 503 through a reinforcing rib 506, and the lower end of each vertical rib 505 is welded to the lower load-bearing disc 504 through a reinforcing rib 506. Preferably, 4 vertical ribs 505 are installed in the secondary beam 5. A second through hole 501 is provided at the center of the upper load-bearing disc of the secondary beam 5. A triangular thread hole 502 is provided at the center of the lower load-bearing disc 504 of the secondary beam 5. The second through hole 501 on the inner wall of the upper load-bearing disc 503 of the secondary beam 5 sleeves the main boom 1.

[0036] The lower end face of the upper load-bearing disc 503 is fitted and connected to the upper end face of the hydraulic nut 4. The hydraulic nut 4 is also equipped with a piston 401.

[0037] Embodiment 2

[0038] This embodiment describes the functions of each component during the assembly of the load-adjustable sling adjustable joint and the operating state after assembly. Please refer to Figures 1 to 4 , A load-adjustable sling adjustable joint, which consists of a main boom 1, a mechanical locking device 2, a box-shaped main beam 3, a hydraulic nut 4, a secondary beam 5, and an eye bolt 6;

[0039] The box-shaped main beam 3 is responsible for bearing the heavy load during the hoisting operation. It is connected to the main boom 1 through the trapezoidal thread hole 301. During the hoisting process, by rotating the box-shaped main beam 3, the box-shaped main beam 3 can move axially along the main boom 1 by means of the transmission of the trapezoidal thread 101, so as to compensate for the dimensional deviation of the sling and the overweight of the lifted workpiece, and further adjust the horizontal position of the lifted workpiece. The lower end of the box-shaped main beam 3 is provided with a first through hole 302, and the eye bolt 6 can pass through the first through hole 302 at the lower end;

[0040] The upper end of the main suspension rod 1 is of a lifting ring 102 structure, and the lower end is of a trapezoidal thread 101. The trapezoidal threaded hole 301 at the upper end of the box girder 3 is connected to the main suspension rod 1 through the trapezoidal thread 101. The upper end of the auxiliary beam 5 is provided with a second through hole 501, and both the auxiliary beam 5 and the hydraulic nut 4 are sleeved on the main suspension rod 1;

[0041] The auxiliary beam 5 is welded by an upper load-bearing disc 503, a lower load-bearing disc 504, and four vertical ribs 505. Reinforcing ribs 506 are welded at the transition angles of the vertical ribs 505 with the upper load-bearing disc 503 and the lower load-bearing disc 504. The center of the upper load-bearing disc 503 is provided with a second through hole 501, and the center of the lower load-bearing disc 504 is provided with a triangular threaded hole 502. During assembly, the auxiliary beam 5 is installed inside the box girder 3. At the same time, the upper load-bearing disc 503 is hung above the hydraulic nut 4, and the lower end face of the heavy disc 503 is in fit connection with the upper end face of the hydraulic nut 4. The main suspension rod 1 passes through the second through hole 501 of the upper load-bearing disc 503 of the auxiliary beam 5. The trapezoidal thread 101 sleeved on the main suspension rod 1, and the triangular threaded hole 502 of the lower load-bearing disc 504 is in threaded connection with the lifting ring screw 6;

[0042] The hydraulic nuts 4 are all of general models and can be reasonably selected according to the specifications of the trapezoidal thread 101 of the main suspension rod 1.

[0043] Furthermore, the box girder 3 and the main suspension rod 1 are provided with a mechanical locking 2 of a self-locking nut type to prevent relative sliding during hoisting operations. Furthermore, when selecting the hydraulic nut 4, the corresponding pumping equipment is selected.

[0044] During use, after the adjustable joint is assembled, the main hook of the bridge crane is connected to the main suspension rod 1 of the adjustable joint through a sling or an existing lifting tool. During the hoisting operation, a trial hoist can be carried out. At this time, under the action of gravity, the lifting ring screw 6 transmits the axial force to the auxiliary beam 5, so that the lower load-bearing disc 504 of the auxiliary beam 5 fits with the lower end of the box girder 3. The axial force is transmitted to the box girder 3 through the lower load-bearing disc 504, and then transmitted to the trapezoidal thread 101 of the main suspension rod 1 through the connection of the trapezoidal threaded hole 301 of the box girder 3. At this time, the upper end of the box girder 3 does not fit with the upper load-bearing disc 503 of the auxiliary beam 5, and the hydraulic nut 4 does not fit with the upper load-bearing disc 503 of the auxiliary beam 5.

[0045] During the trial lifting process, use a spirit level to check the levelness of the lifted workpiece. If it is found that the lifted workpiece is not level, further rotate the hydraulic nut 4 upward so that the upper end face of the hydraulic nut 4 is in contact with the upper load-bearing disc 503 of the auxiliary beam 5, causing the trapezoidal thread 101 of the auxiliary beam 5 and the main suspension rod 1 to be stressed. Fill the hydraulic nut 4 with oil through a pump device such as an ultra-high pressure hand pump, causing the piston 401 of the hydraulic nut 4 to move upward. The upper load-bearing disc 503 of the auxiliary beam 5 in contact with the hydraulic nut 4 is gradually lifted under the drive of the piston 401 of the hydraulic nut 4, and the lower load-bearing disc 504 of the auxiliary beam 5 is disengaged from the lower end of the box-shaped main beam 3. The load of the lifted workpiece is transferred to the hydraulic nut 4 through hydraulic pressure. At this time, the lifting tool is stressed through the main suspension rod 1, the upper load-bearing disc 503 of the auxiliary beam 5, the hydraulic nut 4, and the eye bolt 6, and the box-shaped main beam 3 is unloaded and in a rotatable free state. After rotating and adjusting the box-shaped main beam 3 to the appropriate number of turns according to the spirit level reading, the hydraulic nut 4 is slowly depressurized, and the piston 401 drains oil under the action of gravity and returns to its original position, causing the box-shaped main beam 3 to be stressed again, and the force transfer of the lifted workpiece load is completed again, making the horizontal adjustment process more time-saving and labor-saving. The entire large-piece lifting process is relatively convenient to operate, highly reliable, and safer.

Claims

1. An adjustable joint for a lifting sling, comprising a main boom (1), characterized in that, The upper end of the main suspension rod (1) is provided with a lifting ring (102), and the outer wall of the lower end of the main suspension rod (1) is provided with trapezoidal threads (101), and the trapezoidal threads (101) are connected to the trapezoidal threaded holes (301) of the frame-shaped main beam (3). The frame-shaped main beam (3) and the main suspension rod (1) are fixedly connected by a mechanical locking device (2); The lower end of the frame-shaped main beam (3) is provided with a first through hole (302). The frame-shaped main beam (3) is internally provided with a secondary beam (5). The upper bearing disc (503) of the secondary beam (5) is hung above the hydraulic nut (4), and the triangular threaded hole (502) on the inner wall of the lower bearing disc (504) of the secondary beam (5) is threadedly connected to the eye bolt (6).

2. The adjustable joint of a hoisting sling according to claim 1, characterized in that, The main suspension rod (1) is helically and fixedly connected to the inner wall of the mechanical locking device (2), and the bottom end of the outer wall of the mechanical locking device (2) is fixedly connected to the frame-shaped main beam (3).

3. An adjustable joint of a hoisting sling according to claim 1, characterized in that, The upper end of the frame-shaped main beam (3) is provided with a trapezoidal threaded hole (301).

4. The adjustable joint of a hoisting sling according to claim 1, characterized in that The secondary beam (5) is internally provided with a plurality of vertical ribs (505). A reinforcing rib (506) is welded at the transition angle of each vertical rib (505) with the upper bearing disc (503) and the lower bearing disc (504), and reinforcing ribs (506) are welded on both sides of each vertical rib (505).

5. The adjustable joint of a lifting sling according to claim 1, characterized in that, The hydraulic nut (4) is further provided with a piston (401).

6. The adjustable joint of a lifting sling according to claim 1, characterized in that, The upper and lower sides of the secondary beam (5) are respectively provided with an upper bearing disc (503) and a lower bearing disc (504). A plurality of vertical ribs (505) are welded to the upper bearing disc (503) and the lower bearing disc (504). The upper end of each vertical rib (505) is welded to the upper bearing disc (503) through a reinforcing rib (506), and the lower end of each vertical rib (505) is welded to the lower bearing disc (504) through a reinforcing rib (506).

7. An adjustable joint of a lifting sling according to claim 1, characterized in that, The center of the upper bearing disc of the secondary beam (5) is provided with a second through hole (501), and the center of the lower bearing disc (504) of the secondary beam (5) is provided with a triangular threaded hole (502).

8. The adjustable joint of a hoisting sling according to claim 1, characterized in that, The second through hole (501) on the inner wall of the upper bearing disc (503) of the secondary beam (5) is sleeved on the main suspension rod (1).

9. The adjustable joint of a hoisting sling according to claim 1, characterized in that The lower end surface of the upper bearing disc (503) is in fitting connection with the upper end surface of the hydraulic nut (4).

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