Pre-tightening elevator hoisting operation method

Abstract

The invention relates to the technical field of hoisting, in particular to a pre-tightening elevator hoisting operation method which comprises the following steps: arranging a locking piece at one end of a mounting pipe, and fixedly arranging a lifting lug plate at the other end of the mounting pipe; one end of a pull rope penetrates through a mounting hole in the lifting lug plate and is fastened and fixed; the pre-tightening elevator is used for clamping an object to be hoisted, a rotating handle of the pre-tightening elevator is rotated to a locking position, the mounting pipe is arranged on the rotating handle in a sleeving manner, and the mounting pipe is locked by the locking piece; hoisting equipment is connected with the pre-tightening elevator through a shackle, and the hoisting equipment is lifted to completely hoist the object; the hoisting equipment hoists the object to a mounting position for positioning; the pull rope is pulled, so that the rotating handle rotates from the locking position to the unlocking position; and the lifting equipment drives the pre-tightening elevator to be separated from the object. Waste of manpower and time can be reduced, and the safety risk of high-altitude operation is eliminated.

Description

Technical Field

[0001] This invention relates to the field of hoisting technology, and in particular to a method for hoisting operations using pre-tensioned hoisting clamps. Background Technology

[0002] In ship sectioning and steel structure manufacturing, many wall panels, support plates, and steel structural components need to be vertically lifted. Most of these structures are relatively lightweight, and installing lifting clamps would incur significant labor and time costs for installation, dismantling, and re-grinding. Removing shackles connected to the lifting clamps at heights also requires scaffolding or high ladders, resulting in wasted scaffolding and increased safety during construction. Therefore, using pre-tensioning lifting clamps capable of vertical lifting is the best choice. Pre-tensioning lifting clamps are available in rated lifting capacities of 1 ton, 2 tons, 3 tons, 5 tons, and 10 tons. The appropriate pre-tensioning lifting clamp should be selected based on the weight of the object being lifted for turning and lifting operations. The pre-tensioning lifting clamp has a rotating handle with locked and unlocked positions relative to the clamp body. Adjusting the angle of the rotating handle switches between these positions. After lifting, simply switch the rotating handle to the unlocked position to remove the pre-tensioning lifting clamp and complete the lifting operation. Although the cost of welding and dismantling the hanging brackets is eliminated, the removal of the pre-tightening hanging brackets still requires personnel to use scaffolding or ladders to dismantle them, which also wastes manpower and time, and poses safety risks of working at height.

[0003] Therefore, a pre-tightening clamp lifting operation method is needed to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a pre-tightening clamp hoisting operation method that can reduce the waste of manpower and time and eliminate the safety risks of high-altitude operations.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] The pre-tensioned clamp lifting operation method includes the following steps:

[0007] S1. A locking element is provided at one end of the mounting tube, and a lifting lug is fixedly provided at the other end of the mounting tube;

[0008] S2. Pass one end of the pull rope through the mounting hole on the lifting lug plate and fasten it securely;

[0009] S3. The object to be hoisted is clamped by a pre-tightening clamp. The rotating handle of the pre-tightening clamp is rotated to the locking position. The installation tube is sleeved on the rotating handle and locked by the locking component.

[0010] S4. The lifting equipment is connected to the pre-tightening clamp via a shackle, and the lifting equipment lifts the object completely.

[0011] S5. The lifting equipment lifts the object to the installation position for positioning until the object is installed.

[0012] S6. Pull the pull rope to rotate the rotary handle from the locked position to the unlocked position;

[0013] S7. The lifting equipment drives the pre-tightening clamp to separate from the object, completing the lifting.

[0014] In some embodiments, in step S1, a connecting hole is made on the mounting tube, a nut is welded at the connecting hole, the locking element is a bolt, and the bolt is screwed to the nut.

[0015] In some embodiments, in step S1, the mounting holes of the lug plate are ground and rounded.

[0016] In some embodiments, a safety chain is provided on the mounting tube, and the other end of the safety chain is attached to the shackle.

[0017] In some embodiments, in step S4, the wire rope of the lifting device is pulled to a stressed state, and the connection between the pre-tightening clamp and the object is checked to see if it is stable. After confirming that it is stable, the lifting device is used again to lift until the object is completely lifted off the ground.

[0018] In some embodiments, in step S5, the rope is kept slack during the hoisting of the object.

[0019] In some embodiments, in step S6, when the lifting equipment descends to the point where the wire rope of the lifting equipment is no longer under stress, the object is checked to see if it is securely installed. After confirming that it is securely installed, the operation of switching the rotating handle to the unlock position is then performed.

[0020] In some embodiments, in step S6, the pre-tensioning clamp is observed from below to see if it is fully open. If it is not fully open, the pull rope is pulled until the pre-tensioning clamp is in the fully open unlocked state.

[0021] In some embodiments, in step S7, the lifting device drives the pre-tightening clamp to rise at a first speed, and if any jamming is detected during the rising process, it stops immediately.

[0022] In some embodiments, in step S7, after the pre-tensioned clamp rises to a set distance from the object, the lifting device drives the pre-tensioned clamp to rise to a set height at a second speed, wherein the first speed is less than the second speed.

[0023] The beneficial effects of this invention are:

[0024] This invention provides a pre-tensioning clamp lifting operation method. A locking component is installed at one end of the installation pipe, and a lifting lug is fixedly installed at the other end. One end of a pull rope passes through the installation hole on the lifting lug and is secured. The object to be lifted is clamped using the pre-tensioning clamp. The rotating handle of the pre-tensioning clamp is rotated to the locked position, and the installation pipe is fitted onto the rotating handle and locked using the locking component. The lifting equipment then lifts the object to the installation position for positioning until the object is installed. Pulling the pull rope causes the rotating handle to rotate from the locked position to the unlocked position, separating the pre-tensioning clamp from the object, thus completing the lifting operation. This method eliminates the need for ladders or other tools, and avoids requiring workers to climb to heights. Simply pulling the pull rope from the ground switches the rotating handle from the locked to the unlocked position, separating the pre-tensioning clamp from the object. This reduces manpower and time waste and eliminates the safety risks of working at heights. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0026] Fig. 1 This is a flowchart of a pre-tightening clamp hoisting operation method according to the present invention;

[0027] Fig. 2 This is a schematic diagram of the installation pipe and lifting lug plate in a pre-tightening lifting clamp lifting operation method of the present invention;

[0028] Fig. 3 This is a schematic diagram of the installation pipe and safety chain in a pre-tightening hoisting operation method of the present invention.

[0029] In the picture:

[0030] 1. Mounting tube; 2. Lifting lug plate; 21. Mounting hole; 3. Locking component; 4. Safety chain; 41. Fixing ring. Detailed Implementation

[0031] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0032] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0033] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0034] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0035] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0036] In the process of lifting objects using hoisting equipment and pre-tensioned clamps, in order to reduce the waste of manpower and time and eliminate the safety risks of working at height, such as... Figs. 1-3 As shown, the present invention provides a method for lifting with pre-tensioned lifting clamps. The method for lifting with pre-tensioned lifting clamps includes the following steps:

[0037] S1. A locking element 3 is installed at one end of the mounting pipe 1, and a lifting lug 2 is fixedly installed at the other end of the mounting pipe 1;

[0038] S2. Pass one end of the pull rope through the mounting hole 21 on the lifting lug plate 2 and fasten it securely;

[0039] S3. Use the pre-tightening clamp to hold the object to be hoisted, rotate the rotating handle of the pre-tightening clamp to the locking position, put the installation tube 1 on the rotating handle, and lock it with the locking part 3.

[0040] S4. The lifting equipment is connected to the pre-tightening clamp via a shackle, and the lifting equipment lifts the object completely.

[0041] S5. The lifting equipment lifts the object to the installation position for positioning until the object is installed;

[0042] S6. Pull the cord to rotate the handle from the locked position to the unlocked position;

[0043] S7. The lifting equipment separates the pre-tightened clamp from the object, completing the lifting process.

[0044] Using the above method, there is no need to use ladders or other tools, nor do workers need to climb to operate. Simply pull the rope on the ground to switch the rotating handle from the locked position to the unlocked position, thereby separating the pre-tightened hanging clamp from the object. This reduces the waste of manpower and time and eliminates the safety risks of working at height.

[0045] In some embodiments, in step S1, a connecting hole is made in the mounting tube 1, and a nut is welded to the connecting hole. The locking element 3 is a bolt, and the bolt and nut are screwed together. By using the bolt and nut to cooperate, after the mounting tube 1 is fitted into the rotating handle, the bolt is tightened so that the bolt abuts against the rotating handle, ensuring a stable connection between the mounting tube 1 and the rotating handle. During the hoisting operation, the mounting tube 1 will not fall off the rotating handle. To facilitate tightening the bolt, a rotating part is welded to the head of the bolt. The rotating part increases the tightening torque, thereby facilitating the worker to quickly rotate the bolt.

[0046] In some embodiments, in step S1, the mounting hole 21 of the lifting lug 2 is ground and rounded. Since the pull rope is installed in the mounting hole 21, there will be relative friction between the pull rope and the edge of the mounting hole 21 during subsequent pulling. By grinding and rounding the mounting hole 21, the wear of the pull rope can be reduced.

[0047] In some embodiments, a safety chain 4 is provided on the mounting pipe 1, with the other end of the safety chain 4 attached to a shackle. Specifically, both ends of the safety chain 4 are provided with mounting rings and fixing rings 41, with the mounting rings welded to the mounting pipe 1. During the lifting of the object, the fixing rings 41 are fitted onto the shackles. By providing the safety chain 4, a safety function is achieved, eliminating the risk of the mounting pipe 1 falling due to excessive tension when the pre-tightening clamp is opened by rotating the handle.

[0048] In some embodiments, in step S4, the wire rope of the lifting equipment is pulled to a stressed state, and the connection between the pre-tensioned clamp and the object is checked to ensure stability. After confirming stability, the lifting equipment is used again to lift the object until it is completely lifted off the ground. This method ensures safety during the lifting process.

[0049] In some embodiments, during step S5, the pull rope is kept slack during the lifting of the object. This prevents the pull rope from getting caught on other parts or objects, facilitating subsequent operation of the pull rope.

[0050] In some embodiments, in step S6, when the lifting equipment descends to the point where the wire rope of the lifting equipment is no longer under tension, the object is checked to ensure it is securely installed. After confirming that it is securely installed, the handle is rotated to the unlocked position. This method ensures that the object is in a stable and fixed state when the pre-tensioning clamp is opened, preventing accidents.

[0051] In some embodiments, in step S6, the pre-tensioning clamp is observed from below to see if it is fully open. If it is not fully open, the pull rope is continued to be pulled until the pre-tensioning clamp is in the fully open unlocked state. This method ensures that the pre-tensioning clamp is fully open, facilitating subsequent separation of the pre-tensioning clamp from the object.

[0052] In some embodiments, in step S7, the lifting equipment raises the pre-tensioned clamp at a first speed; if any jamming is detected during the raising process, it stops immediately. This method further ensures safety during the separation of the pre-tensioned clamp from the object.

[0053] In some embodiments, in step S7, after the pre-tensioned shackle rises to a set distance from the object, the lifting equipment drives the pre-tensioned shackle to rise to a set height at a second speed, wherein the first speed is less than the second speed. In this embodiment, the set distance is 200mm. This method accelerates the separation of the pre-tensioned shackle from the object, improving efficiency. After the shackle is raised to a safe height, the lifting equipment is directed to move to begin lifting the next object, or to end the lifting operation.

[0054] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A method for lifting operations using pre-tightened lifting clamps, characterized in that, Includes the following steps: S1. A locking element (3) is provided at one end of the mounting tube (1), and a lifting lug (2) is fixedly provided at the other end of the mounting tube (1); S2. Pass one end of the pull rope through the mounting hole (21) on the lifting lug plate (2) and fasten it securely; S3. The object to be hoisted is clamped by the pre-tightening clamp, the rotating handle of the pre-tightening clamp is rotated to the locking position, the installation tube (1) is sleeved on the rotating handle, and the locking part (3) is used to lock it. S4. The lifting equipment is connected to the pre-tightening clamp via a shackle, and the lifting equipment lifts the object completely. S5. The lifting equipment lifts the object to the installation position for positioning until the object is installed. S6. Pull the pull rope to rotate the rotary handle from the locked position to the unlocked position; S7. The lifting equipment drives the pre-tightening clamp to separate from the object, completing the lifting.

2. The pre-tightening clamp hoisting operation method according to claim 1, characterized in that, In step S1, a connection hole is opened on the mounting tube (1), and a nut is welded at the connection hole. The locking member (3) is a bolt, and the bolt is screwed to the nut.

3. The pre-tightening clamp hoisting operation method according to claim 1, characterized in that, In step S1, the mounting holes (21) of the lug plate (2) are polished and rounded.

4. The pre-tightening clamp hoisting operation method according to claim 1, characterized in that, A safety chain (4) is provided on the installation tube (1), and the other end of the safety chain (4) is hung on the shackle.

5. The pre-tightening clamp hoisting operation method according to claim 1, characterized in that, In step S4, the wire rope of the lifting equipment is pulled to a stressed state, and the connection between the pre-tightening clamp and the object is checked to ensure stability. After confirming stability, the lifting equipment is used again to lift the object until it is completely lifted off the ground.

6. The pre-tightening clamp hoisting operation method according to claim 1, characterized in that, In step S5, the rope is kept slack during the hoisting of the object.

7. The pre-tightening clamp hoisting operation method according to claim 1, characterized in that, In step S6, when the lifting equipment descends to the point where the wire rope of the lifting equipment is no longer under stress, check whether the object is securely installed. After confirming that it is securely installed, then switch the rotating handle to the unlock position.

8. The pre-tightening clamp hoisting operation method according to claim 1, characterized in that, In step S6, observe whether the pre-tensioning clamp is fully open from below. If it is not fully open, continue pulling the rope until the pre-tensioning clamp is in the fully open unlocked state.

9. The pre-tightening clamp hoisting operation method according to claim 1, characterized in that, In step S7, the lifting equipment drives the pre-tightening clamp to rise at a first speed. If any jamming is detected during the rising process, it is stopped immediately.

10. The pre-tightening clamp hoisting operation method according to claim 9, characterized in that, In step S7, after the pre-tensioned clamp rises to a set distance from the object, the lifting equipment drives the pre-tensioned clamp to rise to a set height at a second speed, wherein the first speed is less than the second speed.

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