Special lifting device for pipe penetrating mandrel

Abstract

A kind of special lifting appliance for pipe penetrating mandrel, including steel chain, steel chain is symmetrical structure at both ends, two end portions of steel chain connect two lifting rings: top end lifting ring and root end lifting ring, specifically: the end portion of steel chain is two strands of split steel chain: first split steel chain, second split steel chain, first split steel chain and second split steel chain are fixed at the symmetrical position of top end lifting ring or root end lifting ring;Steel chain is equipped with two connecting points, and the two end portions of hoisting rope are connected by two connecting points;One of top end lifting ring and root end lifting ring is articulated control lever.The utility model provides a kind of mandrel lifting appliance, utilizes the two sets of top end, root end of lifting appliance, utilizes control lever to control circumferential direction, it is more convenient.

Description

Technical Field

[0001] This utility model belongs to the field of mandrel technology for processing steel pipes, and specifically relates to a special lifting tool for mandrels for pipe insertion. Background Technology

[0002] During the processing of steel pipes, the initial form is a solid steel billet. The process of turning the billet into a steel pipe requires the use of a mandrel (also called a core rod). The mandrel is a solid cylindrical structure with a pointed tip. The pointed tip of the mandrel is used to pass through the billet to form the steel pipe. After use, the mandrels need to be stacked and stored in a storage area. The current method for stacking and storing mandrels is to use a crane to lift the mandrel from its middle position and place it in the storage area.

[0003] like Figure 1 The core rod 90 is cylindrical in shape, with one end being the tip 92 and the other end being the root 91. During the lifting and moving of the core rod, due to its weight, it is very inconvenient to use ropes to tie it around the entire cylinder.

[0004] Therefore, the technical problem to be solved by this utility model is: how to conveniently fix and lift. Utility Model Content

[0005] To address the issue of how to conveniently fix and lift mandrels, this utility model provides a mandrel lifting device.

[0006] The specific plan is as follows: A special lifting device for mandrel insertion includes a steel chain with a symmetrical structure at both ends. Two lifting rings are connected to the two ends of the steel chain: a top-end lifting ring and a root-end lifting ring. Specifically, the end of the steel chain is divided into two sub-chains: a first sub-chain and a second sub-chain. The first sub-chain and the second sub-chain are fixed symmetrically at either the top-end lifting ring or the root-end lifting ring. The steel chain has two connection points, through which the two ends of a lifting rope are connected. A control rod is hinged to one of the lifting rings at the top end and the root end.

[0007] Two earrings are symmetrically provided at the base end of the hanging ring, with one earring connected to each of the first and second steel chains.

[0008] The beneficial effects of this utility model are as follows: This utility model provides a mandrel lifting device, which uses two sleeves on the top and bottom ends of the lifting device and a control rod to control the circumferential direction, which is relatively convenient. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of existing technology.

[0010] Figure 2 This is a schematic diagram of the present invention.

[0011] Figure 3 This is an enlarged schematic diagram of the first ring.

[0012] Figure 4 This is a schematic diagram of the utility model in use. Detailed Implementation

[0013] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the implementation of this utility model, not all of it. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0014] like Figure 2-3 As shown, a special lifting tool for mandrel insertion includes a steel chain 10, which has a symmetrical structure at both ends. Two lifting rings are connected to the two ends of the steel chain 10: a top end lifting ring 22 and a root end lifting ring 21. Specifically: The end of the steel chain 10 is divided into two sub-steel chains: the first sub-steel chain 11 and the second sub-steel chain 12. The first sub-steel chain 11 and the second sub-steel chain 12 are fixed at symmetrical positions on the top end ring 22 or the root end ring 21.

[0015] The steel chain 10 has two connection points 13, through which the two ends of the lifting rope 14 are connected.

[0016] A control rod 23 is hinged to one of the top end ring 22 and the root end ring 21.

[0017] For convenience, two earrings 24 are symmetrically provided on the root end ring 21, and the first branch steel chain 11 and the second branch steel chain 12 are respectively connected to one earring 24.

[0018] The strength of steel chain 10 and lifting rope 14 must meet the design requirements.

[0019] Its working principle is as follows: During hoisting: like Figure 2-4 Keeping all the earrings 24 horizontal, place the base end ring 21 onto the base end of the mandrel 90 (the base end is thinner than the body, so it can be done without lifting the mandrel 90), and place the tip end ring 22 onto the tip end of the mandrel 90. Use the crane hook to hook onto the middle of the lifting rope 14. The hook gradually rises, gradually tightening the lifting rope 14 and the steel chain 10, making them zigzag lines. At this time, both rings (tip end ring 22 and base end ring 21) are subjected to an inward component force, causing them to tend to move towards the center and not fall off the mandrel 90.

[0020] In addition, the steel chain 10 has a symmetrical structure at both ends, which makes the entire lifting device and the core rod 90 nearly balanced, and there will be no seesaw situation where one end is light and the other end is heavy, so it is relatively stable.

[0021] As the crane hook continues to rise, the lifting device hoists the mandrel 90. At this time, the mandrel 90 can be rotated in the horizontal plane by the control rod 23 to control its circumferential position. With the crane hook controlling its vertical position, it can reach the designated position.

[0022] When putting it down: As the crane hook descends, the mandrel 90 is placed in the designated position. The crane hook continues to descend, at which point the steel chain 10 is no longer taut, and the two lifting rings (top end lifting ring 22 and root end lifting ring 21) are removed from the top and root ends of the mandrel 90, completing the lowering action.

[0023] For other details, please refer to existing technologies.

[0024] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A special lifting tool for inserting mandrels, comprising a steel chain (10), characterized in that: The steel chain (10) has a symmetrical structure at both ends, with two lifting rings connected to the two ends of the steel chain (10): the top lifting ring (22) and the root lifting ring (21), specifically: The end of the steel chain (10) is divided into two sub-steel chains: the first sub-steel chain (11) and the second sub-steel chain (12). The first sub-steel chain (11) and the second sub-steel chain (12) are fixed at symmetrical positions on the top end ring (22) or the root end ring (21). The steel chain (10) has two connection points (13), and the steel chain (10) is connected to the two ends of the lifting rope (14) through the two connection points (13); The top end ring (22) and the root end ring (21) are hinged to the control rod (23).

2. The special lifting tool for mandrel insertion as described in claim 1, characterized in that: The root end ring (21) is symmetrically provided with two earrings (24), and the first branch steel chain (11) and the second branch steel chain (12) are respectively connected to one earring (24).

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