A pulley block device for adjusting the angle of inverted U-shaped prestressed steel strands

Abstract

A pulley block device for adjusting the threading angle of an inverted U-shaped prestressed steel bundle comprises a 70t fixed pulley, which is fixed to the outer wall of a prestressed corridor, and a 35t winch is provided on one side of the 70t fixed pulley. The 5t winch drags the traction wire rope of the 35t winch through the 70t fixed pulley, the 10t fixed pulley, the guide frame A, the steel bundle channel, and the guide frame B in sequence, and is finally connected to a traction head of the prestressed steel bundle, and the steel bundle is again pulled from a wiring tube into the steel bundle channel through the traction wire rope.

Description

Technical Field

[0001] The present technology relates to the field of pulley blocks, and in particular to a pulley block device for adjusting the threading angle of an inverted U-shaped prestressed steel bundle. Background Art

[0002] The third-generation nuclear power technology "Hualong One" independently developed and designed by my country has an inverted U-shaped prestressed steel bundle in the inner containment. The weight of a single steel bundle is nearly 10t. In addition to the friction of the channel during the traction process, a 35t fixed winch is required to smoothly introduce the steel bundle into the channel. Therefore, several requirements need to be met: 1. In order to prevent the winch from sliding, it is necessary to use high-strength bolts to fix it to the ground of the prestressed construction corridor. 2. The distance between the winch and the guide device (a device that converts the direction of travel of the prestressed steel bundle from horizontal to vertical) needs to be strictly controlled to ensure the normal winding of the winch. 3. It is necessary to ensure that the winch outlet and the guide device are in a straight line to prevent friction between the winch cable and the guide device entrance. Therefore, in the early stage of the construction of the first pile of "Hualong One", the site needs to keep moving the winch to meet the above three conditions, which brings great inconvenience to the on-site bundle threading operation, affecting the construction efficiency and the quality of the steel bundle introduction. Fixed pulleys of different specifications are customized by calculation and installed on the corridor wall between the winch and the guide device. The pulley group works together to adjust the angle of introduction of the steel bundle. The device can ensure that the winch only needs to complete the introduction of all steel bundles at two positioning points during the entire construction process, which greatly improves the efficiency and quality of the introduction of the inverted U-shaped steel bundle. Summary of the invention

[0003] The purpose of the present invention is to provide a pulley block device for adjusting the threading angle of an inverted U-shaped prestressed steel bundle, so as to realize free adjustment of the threading angle of the inverted U-shaped prestressed steel bundle, avoid frequent displacement of the winch, and improve the threading efficiency and quality.

[0004] The technical solution of the present invention is as follows: a pulley block device for adjusting the threading angle of an inverted U-shaped prestressed steel bundle, comprising a 70t fixed pulley, the 70t fixed pulley is fixed on the outer wall of a prestressed corridor, and one side of the 70t fixed pulley is a 35t winch, the 5t winch drags the traction wire rope of the 35t winch through the 70t fixed pulley, the 10t fixed pulley and then through a guide frame A, a steel bundle channel and a guide frame B, and finally is connected to a traction head of the prestressed steel bundle, and the steel bundle is again pulled from the wiring tube into the steel bundle channel through the traction wire rope.

[0005] There are multiple 10t fixed pulleys, evenly arranged on the inner wall of the prestressed corridor.

[0006] There are 20 10t fixed pulleys, evenly arranged on the inner wall of the prestressed corridor.

[0007] There are 10 10t fixed pulleys, evenly arranged on the inner wall of the prestressed corridor.

[0008] There are 15 10t fixed pulleys, evenly arranged on the inner wall of the prestressed corridor.

[0009] There are 18 10t fixed pulleys, evenly arranged on the inner wall of the prestressed corridor.

[0010] The significant effect of the present invention is that since the prestressed construction corridor is an annular space, the pulley block device is installed as a whole between the winch and the guide frame, which realizes the arbitrary adjustment of the angle of the winch traction cable and is no longer affected by the angle and distance of the guide frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of a pulley block device for adjusting the threading angle of an inverted U-shaped prestressed steel strand according to the present invention;

[0012] In the figure: outer wall 1, inner wall 2, 35t winch 3, guide frame B4, guide frame A6, steel bundle channel 7, wiring tube 8, prestressed corridor 9, 5t small winch 10, prestressed steel bundle traction head 11, 70t fixed pulley 12, 10t fixed pulley 13, traction wire rope 14, DETAILED DESCRIPTION

[0013] A pulley block device for adjusting the threading angle of an inverted U-shaped prestressed steel bundle comprises a 70t fixed pulley 12, the 70t fixed pulley 12 is fixed on the outer wall 1 of a prestressed corridor 9, and a 35t winch 3 is provided on one side of the 70t fixed pulley 12. First, a 5t winch 10 is used to drag the traction wire rope 14 of the 35t winch 3 through the 70t fixed pulley 12 and the 10t fixed pulley 13 in sequence, and then through a guide frame A6, a steel bundle channel 7, and a guide frame B4, and finally connected to a prestressed steel bundle traction head 11. After the connection is completed, the 35t winch 3 is started again, and the steel bundle is again pulled from the wiring tube 8 into the steel bundle channel 7 through the traction wire rope 14, and the threading work is formally completed.

[0014] There are 20 10t fixed pulleys 13 in total, which are evenly arranged on the inner wall 2 of the prestressed corridor 9.

[0015] The traction wire rope 14 of the 35t winch 3 can change its angle freely after passing through the 70t fixed pulley 12, which will not affect the wire-out and wire-receiving functions of the 35t winch 3 and achieve a fixed placement angle. Different numbers of 10t fixed pulleys 13 will be put into operation between the traction wire rope 14 after passing through the 70t fixed pulley 12 and the guide frame 6 according to the distance, ensuring that the wire rope 14 smoothly enters the guide frame A6 and does not rub against the inner wall 2 of the corridor 9.

[0016] The angle and direction of the traction wire rope 14 can be changed at will through the 70t fixed pulley 12 and the 10t fixed pulley 13, releasing the position placement and angle restrictions of the 35t winch 3 and the guide frame A6.

Claims

1. A pulley block device for adjusting the angle of an inverted U-shaped prestressed steel strand, characterized in that: The invention comprises a 70t fixed pulley (12), which is fixed on the outer wall (1) of the prestressed corridor (9), and a 35t winch (3) is provided on one side of the 70t fixed pulley (12). The 5t winch (10) drags the traction wire rope (14) of the 35t winch (3) through the 70t fixed pulley (12), the 10t fixed pulley (13), the guide frame A (6), the steel bundle channel (7), and the guide frame B (4), and finally connects with the prestressed steel bundle traction head (11), and pulls the steel bundle from the wiring tube (8) into the steel bundle channel (7) again through the traction wire rope (14).

2. The pulley block device for adjusting the angle of inverted U-shaped prestressed steel strand according to claim 1, characterized in that: There are a plurality of 10t fixed pulleys (13) which are evenly arranged on the inner wall (2) of the prestressed corridor (9).

3. The pulley block device for adjusting the angle of inverted U-shaped prestressed steel strand according to claim 1, characterized in that: There are 20 10t fixed pulleys (13) in total, which are evenly arranged on the inner wall (2) of the prestressed corridor (9).

4. The pulley block device for adjusting the angle of inverted U-shaped prestressed steel strand according to claim 1, characterized in that: There are 10 10t fixed pulleys (13) in total, which are evenly arranged on the inner wall (2) of the prestressed corridor (9).

5. The pulley block device for adjusting the angle of inverted U-shaped prestressed steel strand according to claim 1, characterized in that: There are 15 10t fixed pulleys (13) in total, which are evenly arranged on the inner wall (2) of the prestressed corridor (9).

6. The pulley block device for adjusting the angle of inverted U-shaped prestressed steel strand according to claim 1, characterized in that: There are 18 10t fixed pulleys (13) in total, which are evenly arranged on the inner wall (2) of the prestressed corridor (9).

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