Auxiliary tool for flange hoisting

Abstract

The utility model belongs to the technical field of hoisting tools, and particularly relates to an auxiliary tool for flange hoisting, which comprises a flange plate and an auxiliary hoisting tool main body, the auxiliary hoisting tool main body penetrates through the flange plate, and the inner side of the auxiliary hoisting tool main body is rotatably connected with a lower check block which is in contact with the lower surface of the flange plate. A clamping pin is slidably connected into the auxiliary lifting appliance body and connected with the lower check block in a clamped mode, a spring is arranged in the auxiliary lifting appliance body, and a connecting sleeve is fixedly connected to the top of the auxiliary lifting appliance body. According to the auxiliary lifting appliance disclosed by the utility model, the auxiliary lifting appliance main body is arranged, and the rotatable lower stop block is arranged in the auxiliary lifting appliance main body, so that after the auxiliary lifting appliance main body is inserted into a bolt hole of a flange plate, the lower stop block is rotated from a vertical state to a horizontal state and is fixed through the bayonet lock, and the bottom of the flange plate can be supported; and compared with a bolt fixing mode, the lifting device is more convenient to disassemble and assemble.

Description

Technical Field

[0001] This utility model relates to the field of lifting tools, specifically an auxiliary tool for flange lifting. Background Technology

[0002] During the assembly process, flanges need to be installed at the ends of the wind turbine towers to connect multiple shorter wind turbine towers. Therefore, the flanges need to be hoisted and transported.

[0003] A search revealed that utility model patent CN219078830U discloses an auxiliary tool for flange lifting. This tool includes a base plate placed on the edge of one side of the flange and attached to the flange surface. The base plate also has a lifting arm with lifting holes, and at least two connecting bolts. These connecting bolts are respectively positioned within connecting holes on the base plate surface on both sides of the lifting arm. One end of each connecting bolt passes through a tooling hole on the flange surface corresponding to the connecting hole, and the end of each connecting bolt extending out of the tooling hole is connected to a nut. This flange lifting auxiliary tool utilizes the tooling holes on the flange to fix the base plate with the lifting arm onto the flange surface using the connecting bolts. A hook or sling is then installed on the lifting holes of the lifting arm, allowing the flange to be lifted using a crane. After the flange is in place, the base plate can be quickly removed from the flange by loosening the nuts on the connecting bolts, without adding redundant structure to the flange.

[0004] However, existing flange lifting auxiliary tools are fixed to the flange with bolts, which is inconvenient to use. Furthermore, because they are fixed, the installation angles of the various auxiliary tools are relatively fixed, which is also inconvenient. Therefore, improvements are needed. Utility Model Content

[0005] The purpose of this utility model is to provide an auxiliary tool for flange lifting, which solves the problem that existing auxiliary tools for flange lifting are fixed to the flange with bolts, making them inconvenient to use. It also solves the problem that the installation angles of the various auxiliary tools are relatively fixed due to their fixed nature, which is also inconvenient.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an auxiliary tool for flange lifting, comprising a flange and an auxiliary lifting device body, wherein the auxiliary lifting device body is disposed through the flange, a lower stop block is rotatably connected to the inner side of the auxiliary lifting device body, the lower stop block contacts the lower surface of the flange, a locking pin is slidably connected inside the auxiliary lifting device body, the locking pin engages with the lower stop block, a spring is disposed inside the auxiliary lifting device body, a connecting sleeve is fixedly connected to the top of the auxiliary lifting device body, a connecting head is rotatably connected inside the connecting sleeve, and a lifting ring is fixedly connected to the top of the connecting head.

[0007] Preferably, a pivot pin is fixedly connected to the side of the lower stop block, the pivot pin passing through the auxiliary lifting device body and rotatably connected to the auxiliary lifting device body. The pivot pin provides a pivot for the rotation of the lower stop block.

[0008] Preferably, one end of the spring is fixedly connected to the locking pin, and the other end of the spring is fixedly connected to the inner surface of the auxiliary lifting device body. The spring allows the elastic force to be applied to the locking pin.

[0009] Preferably, the lower stop block has slots at its upper end and both its front and rear ends, and the positions of the slots correspond to the locking pins. The cooperation between the slots and the locking pins serves to position the lower stop block.

[0010] Preferably, the inner wall of the connecting sleeve is embedded with balls, and the circumferential surface of the connector head is provided with an annular groove, with the balls slidably connected to the annular groove. The balls and the annular groove provide axial restraint for the connector head without affecting its rotation.

[0011] Preferably, a threaded rubber plug is threadedly connected to the outer side of the auxiliary lifting device body, and the threaded rubber plug is slidably connected to the flange. The threaded rubber plug, in conjunction with the lower stop block, provides a limiting function for the flange.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model provides an auxiliary lifting device body with a rotatable lower stop block inside. When the auxiliary lifting device body is inserted into the bolt hole of the flange, the lower stop block is rotated from a vertical state to a horizontal state and fixed by a locking pin. This provides support for the bottom of the flange, making it easier to lift. Moreover, it is more convenient to assemble and disassemble than to fix it with bolts.

[0014] 2. This utility model provides a connecting sleeve at the top of the auxiliary lifting device body, with a rotatable connector inside the connecting sleeve and a lifting ring on the connector. Ball bearings and annular grooves are then provided between the connector and the connecting sleeve. In this way, the installation position of the entire device on the flange is not restricted, and it can rotate freely, which facilitates lifting. Attached Figure Description

[0015] Figure 1 The overall three-dimensional structure of this utility model Figure 1 ;

[0016] Figure 2 The overall three-dimensional structure of this utility model Figure 2 ;

[0017] Figure 3 For the present utility model Figure 1 A front sectional view of the main body of the auxiliary lifting device;

[0018] Figure 4 For the present utility model Figure 1 Schematic diagram of local structure Figure 1 ;

[0019] Figure 5 For the present utility model Figure 1 Schematic diagram of local structure Figure 2 .

[0020] In the diagram: 1. Flange; 2. Main body of auxiliary lifting device; 3. Lower stop block; 4. Turning pin; 5. Locking pin; 6. Spring; 7. Threaded rubber plug; 8. Connecting sleeve; 9. Connecting head; 10. Lifting eye; 11. Ball bearing; 12. Ring groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-5 An auxiliary tool for flange lifting includes a flange 1 and an auxiliary lifting body 2. The auxiliary lifting body 2 passes through the flange 1. A lower stop 3 is rotatably connected to the inner side of the auxiliary lifting body 2, and the lower stop 3 contacts the lower surface of the flange 1. A pivot pin 4 is fixedly connected to the side of the lower stop 3, and the pivot pin 4 passes through the auxiliary lifting body 2 and is rotatably connected to it. The pivot pin 4 provides a pivot for the rotation of the lower stop 3.

[0023] Please see Figure 1-5The auxiliary lifting device body 2 has a sliding connection of a locking pin 5 inside, which engages with the lower stop block 3. A spring 6 is also installed inside the auxiliary lifting device body 2; one end of the spring 6 is fixedly connected to the locking pin 5, and the other end is fixedly connected to the inner surface of the auxiliary lifting device body 2. The spring 6 allows elastic force to be applied to the locking pin 5. The lower stop block 3 has slots at its upper end and both its front and rear ends, and the positions of these slots correspond to those of the locking pin 5. The engagement of the slots with the locking pin 5 provides positioning for the lower stop block 3.

[0024] Please see Figure 1-5 The auxiliary lifting device body 2 has a connecting sleeve 8 fixedly connected to its top. A connecting head 9 is rotatably connected inside the connecting sleeve 8, and a lifting ring 10 is fixedly connected to the top of the connecting head 9. Ball bearings 11 are embedded in the inner wall of the connecting sleeve 8, and an annular groove 12 is formed on the circumferential surface of the connecting head 9. The ball bearings 11 and the annular groove 12 provide axial restraint for the connecting head 9 without affecting its rotation. A threaded rubber plug 7 is threadedly connected to the outer side of the auxiliary lifting device body 2, and the threaded rubber plug 7 is slidably connected to the flange 1. The threaded rubber plug 7, in conjunction with the lower stop block 3, provides restraint for the flange 1.

[0025] The specific implementation process of this utility model is as follows: In normal use, the lower stop block 3 is in a vertical position within the auxiliary lifting device body 2. At the same time, the locking pin 5 is engaged in the slot at the arc end of the lower stop block 3 under the action of the spring 6. Then, the auxiliary lifting device body 2 is inserted into any bolt hole of the flange 1. Then, the lower stop block 3 is rotated. The lower stop block 3 rotates through the pivot pin 4 and then rotates from a vertical position to a horizontal position. The locking pin 5 is engaged in the slot on the plane of the lower stop block 3. Then, the threaded rubber plug 7 is screwed in so that the threaded rubber plug 7 is inserted into the bolt hole of the flange 1. At this time, the lower stop block 3 abuts against the lower surface of the flange 1. Then, the other auxiliary lifting device bodies 2 are installed on the flange 1 in the same way. This is more convenient than using bolts. Then, the lifting rope is hung on the lifting ring 10 to complete the lifting of the flange 1. Moreover, the lifting ring 10 can rotate freely and is not restricted by the installation position.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An auxiliary tool for flange lifting, comprising a flange (1) and an auxiliary lifting body (2), characterized in that: The auxiliary lifting device body (2) is installed through the flange (1). A lower stop (3) is rotatably connected to the inner side of the auxiliary lifting device body (2). The lower stop (3) contacts the lower surface of the flange (1). A locking pin (5) is slidably connected inside the auxiliary lifting device body (2). The locking pin (5) engages with the lower stop (3). A spring (6) is installed inside the auxiliary lifting device body (2). A connecting sleeve (8) is fixedly connected to the top of the auxiliary lifting device body (2). A connecting head (9) is rotatably connected inside the connecting sleeve (8). A lifting ring (10) is fixedly connected to the top of the connecting head (9).

2. The auxiliary tool for flange lifting according to claim 1, characterized in that: The lower stop (3) is fixedly connected to a pivot pin (4) on its side. The pivot pin (4) passes through the auxiliary lifting device body (2) and is rotatably connected to the auxiliary lifting device body (2).

3. The auxiliary tool for flange lifting according to claim 1, characterized in that: One end of the spring (6) is fixedly connected to the locking pin (5), and the other end of the spring (6) is fixedly connected to the inner surface of the auxiliary lifting device body (2).

4. The auxiliary tool for flange lifting according to claim 1, characterized in that: The lower stop block (3) has slots at its upper end and both front and rear ends, and the positions of the slots correspond to the locking pins (5).

5. The auxiliary tool for flange lifting according to claim 1, characterized in that: The inner wall of the connecting sleeve (8) is embedded with a ball (11), and the circumferential surface of the connector (9) is provided with an annular groove (12), and the ball (11) is slidably connected to the annular groove (12).

6. The auxiliary tool for flange lifting according to claim 1, characterized in that: The auxiliary lifting device body (2) has a threaded rubber plug (7) connected to its outer side by a thread, and the threaded rubber plug (7) is slidably connected to the flange (1).

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