Special lifting appliance for impeller of pressurizing machine

Abstract

The utility model discloses a special lifting appliance for an impeller of a pressurizing machine, which belongs to the technical field of lifting appliances and comprises a movable locking device and a U-shaped hook hinged with the movable locking device, and a sling is tied above the movable locking device. When the device is used, two special lifting appliances are generally needed to be matched for use, the two lifting appliances are clamped on the two sides of the edge of the impeller at an angle difference of 180 degrees, and the self weight of the impeller can drive the movable locking devices of the lifting appliances to automatically lock the edge of the impeller. The lifting appliance is simple in structure, novel in design, low in cost and capable of safely and conveniently lifting the impeller.

Description

Technical Field

[0001] This utility model belongs to the field of lifting tool technology, and in particular to a special lifting tool for a compressor impeller. Background Technology

[0002] When overhauling and replacing the bearings of a cantilever centrifugal gas compressor, the rotor needs to be removed, cleaned, and dynamically balanced after being hoisted out. This process requires multiple hoistings of the rotor, and the impeller must be laid flat during cleaning.

[0003] The structure of the impeller is as follows Figure 1 As shown, the impeller is disc-shaped, including a disc 4-1 and a cover 4-2, as well as several blades spirally arranged between the disc 4-1 and the cover 4-2. During the cleaning process, the impeller needs to be horizontally hoisted. There is no suitable tool in the existing technology. Therefore, there is an urgent need for a special impeller hoisting tool that can hoist the impeller conveniently, quickly and safely. Utility Model Content

[0004] The purpose of this utility model is to provide a special lifting tool for compressor impellers, which can safely and conveniently lift the impellers.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A special lifting tool for a compressor impeller includes a movable locking device and a U-shaped hook hinged to the movable locking device, with a sling attached above the movable locking device.

[0007] A further improvement of this utility model is that the movable locking device is a horizontally placed wedge plate, and the U-shaped hook is hinged to the bottom edge of the wedge plate of the movable locking device by bolts.

[0008] A further improvement of this utility model is that the sling is attached to the upper end of the wedge plate of the movable locking device.

[0009] A further improvement of this utility model is that the end of a vertical rod of the U-shaped hook is hinged to the bottom edge of the wedge plate of the movable locking device by bolts.

[0010] A further improvement of this utility model is that the distance from the bolt to the far end of the bottom edge of the wedge plate is less than the distance between the two vertical rods of the U-shaped hook.

[0011] A further improvement of this utility model is that the thickness of the vertical rod of the U-shaped hook is less than the outermost ring gap between the impeller disc and the wheel cover.

[0012] The technological advancements achieved by this utility model due to the adoption of the above technical solution are as follows:

[0013] This lifting tool features a simple structure, novel design, and low cost. It can be manufactured using scrap materials from the workshop. During use, it hooks onto the impeller, while a movable locking device holds it against the top of the impeller cover to prevent it from falling off during lifting and causing danger. This allows for safe and convenient impeller lifting. This special lifting tool for compressor impellers can also be used for lifting expander impellers, i.e., lifting equipment with a similar impeller shape. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the impeller of this utility model;

[0015] Figure 2 This is a schematic diagram of the special lifting tool for this utility model;

[0016] Figure 3 This is a schematic diagram of using this utility model to hoist the impeller;

[0017] Among them, 1. movable locking device, 2. U-shaped hook, 3. sling, 4. impeller, 4-1. wheel disc, 4-2. wheel cover. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to embodiments:

[0019] like Figure 1 As shown, a special lifting tool for a compressor impeller includes a movable locking device 1 and a U-shaped hook 2 hinged to the movable locking device 1. A sling 3 is attached above the movable locking device 1. The movable locking device 1 is a horizontally placed wedge-shaped plate, and the U-shaped hook 2 is hinged to the bottom edge of the wedge-shaped plate of the movable locking device 1 by bolts 5. The sling 3 is attached to the upper end of the wedge-shaped plate of the movable locking device 1.

[0020] In one embodiment, the movable locking device 1 is a right-angled triangle with a longer base. A hole is opened at the uppermost corner of the movable locking device 1, and the sling 3 is attached to the hole. The sling 3 is generally made of steel wire rope, but other types of rope are also acceptable.

[0021] One end of the vertical rod of the U-hook 2 is hinged to the bottom edge of the wedge plate of the movable locking device 1 by a bolt 5. The distance from the bolt 5 to the far end of the bottom edge of the wedge plate is less than the distance between the two vertical rods of the U-hook 2. When the impeller-specific lifting tool is in use, the lifting tool is lifted, and the U-hook 2 rotates around the bolt 5 under its own weight. The other vertical rod of the U-hook 2 can then be used to hook the gap between the impeller disc 4-1 and the impeller cover 4-2 of the impeller 4.

[0022] The thickness of the vertical rod of the U-shaped hook 2 is less than the outermost gap between the impeller disc 4-1 and the cover 4-2 of the impeller 4. The shape of the vertical and horizontal rods of the U-shaped hook 2 is not limited. They can be made of round rods, square rods, or irregular shapes, as long as one end of the U-shaped hook 2 can be inserted into the gap between the impeller disc 4-1 and the cover 4-2.

[0023] Working principle or usage method:

[0024] When using this device, two special lifting tools are usually required. The two lifting tools are clamped at an angle difference of 180 degrees on both sides of the edge of the impeller 4. After the sling 3 is hung on the movable locking device, it is lifted. The weight of the impeller will drive the movable locking device of the lifting tool to automatically lock the edge of the impeller. That is, one end of the U-shaped hook 2 is clamped inside the edge of the impeller 4, and the movable locking device 1 is clamped on the wheel cover of the impeller 4, so as to achieve the purpose of safe, stable and quick lifting and moving of the impeller.

Claims

1. A special lifting tool for a compressor impeller, characterized in that: Includes a movable locking device (1) and a U-shaped hook (2) hinged to the movable locking device (1), with a sling (3) attached above the movable locking device (1); The movable locking device (1) is a horizontally placed wedge plate, and the U-shaped hook (2) is hinged to the bottom edge of the wedge plate of the movable locking device (1) by bolts (5); The sling (3) is attached to the upper end of the wedge plate of the movable locking device (1); The end of one vertical rod of the U-shaped hook (2) is hinged to the bottom edge of the wedge plate of the movable locking device (1) by a bolt (5).

2. The special lifting tool for a compressor impeller according to claim 1, characterized in that: The distance from the bolt (5) to the far end of the bottom edge of the wedge plate is less than the distance between the two vertical rods of the U-hook (2).

3. A special lifting tool for a compressor impeller according to any one of claims 1-2, characterized in that: The thickness of the vertical rod of the U-shaped hook (2) is less than the outermost ring gap between the impeller (4) disc (4-1) and the wheel cover (4-2).

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