Special hoisting tool for nuclear power steam generator

Abstract

The utility model discloses a special hoisting tool for a nuclear power steam generator, and relates to the technical field of hoisting. Comprising a hoisting assembly detachably connected with the steam generator, the hoisting assembly comprises a beam body, a plurality of supporting legs are arranged on the beam body, hoisting rigging is arranged at the ends, facing the steam generator, of the supporting legs, a hoisting seat is arranged at the ends, away from the supporting legs, of the hoisting rigging, and the hoisting seat is detachably connected with the steam generator. A traction rigging is arranged on the top face of the end, facing the center of the steam generator, of the lifting base, and a balance weight is fixedly connected to the end, away from the lifting base, of the traction rigging and arranged below the beam body. After the hoisting rigging disclosed by the utility model does not apply pulling force to the hanging seat, the hanging seat can be overturned in the steam generator through the matching of the counterweight and the traction rigging, so that the hanging seat can be automatically separated from a positioning flange hole of the steam generator, the potential safety hazard caused by high-altitude operation of personnel is effectively avoided, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hoisting, in particular to a hoisting tool dedicated to a nuclear power steam generator. Background Technique

[0002] The nuclear power steam generator is a variable-section cylindrical sealed container with a diameter of more than 4 meters and an overall height of more than 20 meters. It is formed by welding multiple layers of cylinders. The positioning flange is located in the upper cylinder of the steam generator and is used to support and fix the rotating vane type steam-water separator in the steam generator. The hoisting tool for the positioning flange or the positioning flange and the cylinder assembly cannot be disengaged from the positioning flange hole automatically, and manual removal by construction workers is required. Especially when assembling the cylinders of each layer of the steam generator, the construction workers need to be located at a height of 20 meters inside the cylinder for removal work, which poses certain safety hazards.

[0003] Therefore, there is an urgent need for a hoisting tool dedicated to a nuclear power steam generator, which can enable the lifting seat to completely disengage from the positioning flange hole automatically without manual removal by construction workers, effectively avoiding the safety hazards caused by high-altitude operation of personnel and improving work efficiency. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a hoisting tool dedicated to a nuclear power steam generator to solve the problems existing in the above-mentioned prior art.

[0005] To achieve the above purpose, the utility model provides the following scheme: The utility model provides a hoisting tool dedicated to a nuclear power steam generator, including a hoisting assembly detachably connected to the steam generator. The hoisting assembly includes a beam body, and a plurality of legs are arranged on the beam body. A hoisting tackle is arranged at one end of each leg facing the steam generator, and a lifting seat is arranged at one end of the hoisting tackle away from the leg. The lifting seat is detachably connected to the steam generator. A towing tackle is arranged on the top surface of one end of the lifting seat facing the center of the steam generator, and a counterweight is fixedly connected to one end of the towing tackle away from the lifting seat. The counterweight is arranged below the beam body.

[0006] Preferably, the plurality of legs are arranged at equal intervals.

[0007] Preferably, two sides of one end of the lifting seat in contact with the steam generator are respectively fixedly connected with backing plates, and the backing plates are detachably connected to the steam generator.

[0008] Preferably, a turnbuckle is arranged on the hoisting tackle, and the turnbuckle is arranged between the beam body and the lifting seat.

[0009] Preferably, the towing tackle is wound around a fixed pulley.

[0010] Preferably, the fixed pulley is arranged below the beam body.

[0011] Preferably, the distance between the counterweight and the center of the beam body is less than the distance between the hoisting tackle and the center of the beam body.

[0012] Preferably, a lifting ring is fixedly connected to the center of the top surface of the beam body.

[0013] The present utility model discloses the following technical effects:

[0014] After the hoisting tackle of the present utility model does not apply a pulling force to the hanging seat, through the cooperation of the counterweight and the towing tackle, the hanging seat can be turned over in the steam generator, so that the hanging seat can be disengaged from the positioning flange hole of the steam generator by itself, effectively avoiding the safety hazards caused by high-altitude operation of personnel and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0016] Figure 1 is a schematic top view structure diagram of the present utility model;

[0017] Figure 2 is the present utility model Figure 1 is a schematic sectional view taken along line A-A in the present utility model;

[0018] Figure 3 is a schematic structure diagram when the hanging seat of the present utility model is disassembled;

[0019] Figure 4 is a schematic side view structure diagram of the hanging seat of the present utility model;

[0020] Figure 5 is a schematic top view structure diagram of the hanging seat of the present utility model;

[0021] Among them, 1. Beam body; 2. Hoisting tackle; 3. Hanging seat; 4. Fixed pulley; 5. Counterweight; 6. Towing tackle; 7. Base plate; 8. Leg; 9. Steam generator. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] Referring to Figures 1 - 5 , the present invention discloses a lifting tool dedicated to a nuclear power steam generator, including a lifting assembly detachably connected to the steam generator 9. The lifting assembly includes a beam body 1, and a plurality of legs 8 are arranged on the beam body 1. One end of the leg 8 facing the steam generator 9 is provided with a hoisting rigging 2. One end of the hoisting rigging 2 away from the leg 8 is provided with a hanging seat 3. The hanging seat 3 is detachably connected to the steam generator 9. On the top surface of one end of the hanging seat 3 facing the center of the steam generator 9, a towing rigging 6 is provided. One end of the towing rigging 6 away from the hanging seat 3 is fixedly connected to a counterweight 5, and the counterweight 5 is arranged below the beam body 1.

[0025] The hoisting rigging 2 is rotatably connected to the hanging seat 3, so that the hanging seat 3 can rotate; the towing rigging 6 is rotatably connected to the hanging seat 3, so that the towing rigging 6 can drive the hanging seat 3 to tilt and rotate.

[0026] After the hoisting rigging 2 of the present invention does not apply a pulling force to the hanging seat 3, through the cooperation of the counterweight 5 and the towing rigging 6, the hanging seat 3 can be flipped inside the steam generator 9, so that the hanging seat 3 can be disengaged from the positioning flange hole of the steam generator 9 by itself, effectively avoiding the safety hazards caused by high-altitude operations of personnel and improving work efficiency.

[0027] In a further optimized solution, a plurality of legs 8 are arranged at equal intervals. The plurality of legs 8 are evenly distributed along the center of the beam body 1, so that the plurality of legs 8 can be arranged at equal intervals along the center of the beam body 1, and the force on each leg 8 is uniform; the number of legs 8 is adjusted according to the weight and size of the positioning flange of the steam generator 9 and the cylinder body of the steam generator; thereby adjusting the force application points of the positioning flange of the steam generator 9 to ensure that the positioning flange will not undergo plastic deformation due to excessive local force.

[0028] In a further optimized solution, on both sides of one end of the hanging seat 3 in contact with the steam generator 9, backing plates 7 are respectively fixedly connected, and the backing plates 7 are detachably connected to the steam generator 9.

[0029] The suspension seat 3 is strip-shaped. The width of the suspension seat 3 is smaller than the diameter of the positioning flange hole of the steam generator 9, and the length of the suspension seat 3 is larger than the diameter of the positioning flange hole of the steam generator 9. This enables the suspension seat 3 to pass through the positioning flange hole of the steam generator 9 and lift the positioning flange from below. A backing plate 7 made of a material with a lower hardness and a stepped limit are provided at the part where the suspension seat 3 contacts the positioning flange hole. The backing plate 7 can protect the positioning flange hole from damage. The distance between the outer walls of the two stepped limits is adapted to the diameter of the positioning flange hole, and the two stepped limits are adapted to the inner wall of the positioning flange hole. The stepped limit can effectively ensure that the suspension seat 3 will not slip in the positioning flange hole during the hoisting process, thus preventing hoisting accidents.

[0030] In a further optimized solution, a turnbuckle is provided on the hoisting rigging 2, and the turnbuckle is arranged between the beam body 1 and the suspension seat 3. The turnbuckle can finely adjust the overall length of the hoisting rigging 2, ensure uniform force on the stress points of the positioning flange of the steam generator 9, and can adjust the levelness of the positioning flange to meet the requirements for horizontal hoisting of the positioning flange during the hoisting process.

[0031] In a further optimized solution, a fixed pulley 4 is wound around the towing rigging 6.

[0032] In a further optimized solution, the fixed pulley 4 is arranged below the beam body 1.

[0033] The number and installation position of the fixed pulley 4 can be adjusted according to actual needs. By means of the fixed pulley 4, the running direction position of the towing rigging 6 can be changed, avoiding interference between the counterweight 5 and other structures.

[0034] In this embodiment, two fixed pulleys 4 are used. One fixed pulley 4 is installed at one end of the support leg 8 close to the hoisting rigging 2, and the other fixed pulley 4 is installed on the bottom surface of the beam body 1.

[0035] In a further optimized solution, the distance between the center of the counterweight 5 and the center of the beam body 1 is smaller than the distance between the hoisting rigging 2 and the center of the beam body 1.

[0036] The counterweight 5 is composed of multiple circular counterweight blocks with different thicknesses. After the hoisting is completed, as the lifting appliance descends, the counterweight 5 relies on its own gravity to tilt the suspension seat 3 through the towing rigging 6 until the suspension seat 3 completely disengages from the positioning flange hole. In actual application, the weight of the counterweight 5 can be changed by adjusting the combination of the counterweight blocks, enabling it to meet the requirements of different tilting angles of the suspension seat 3. That is, by using counterweights 5 with different weights, the tilting angle of the suspension seat 3 can be controlled.

[0037] In a further optimized solution, a lifting ring is fixedly connected to the center of the top surface of the beam body 1.

[0038] Working process: The hoisting equipment displaces the hoisting tool directly above the positioning flange and the cylinder body of the steam generator 9. The hoisting tool descends, enabling the lifting seat 3 to pass through the positioning flange hole. Manually assist in adjusting the lifting seat 3 to be horizontal. After lifting the hoisting tool, the lifting seat 3 fits with the positioning flange hole, that is, the backing plate 7 abuts against the positioning flange hole, and then the positioning flange and the cylinder body can be hoisted. Continuously lift the hoisting tool. After hoisting the positioning flange and the cylinder body of the steam generator 9 to the designated position, lower the hoisting tool. The lifting seat 3 automatically tilts under the traction of the counterweight 5 until the lifting seat 3 is completely disengaged from the positioning flange hole. Then, lift the hoisting tool to disengage the lifting seat 3 from the positioning flange hole.

[0039] The utility model effectively overcomes the current situation that after the traditional hoisting tool for the positioning flange and the cylinder body of the steam generator completes the hoisting operation, the lifting seat 3 needs to be manually removed. The counterweight 5 of the utility model drives the traction cable 6 by its own gravity to lift one end of the lifting seat 3, causing the lifting seat 3 to tilt at a certain angle, realizing the complete disengagement of the lifting seat 3 from the positioning flange hole. While effectively avoiding potential safety hazards caused by high-altitude operations of personnel, it improves work efficiency and has great application prospects in the manufacture of nuclear power steam generators.

[0040] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present utility model.

[0041] The embodiments described above are only used to describe the preferred mode of the present utility model, and do not limit the scope of the present utility model. Without departing from the design spirit of the present utility model, various deformations and improvements made by those of ordinary skill in the art to the technical solution of the present utility model shall fall within the protection scope determined by the claims of the present utility model.

Claims

1. A hoisting tool dedicated to a nuclear power steam generator, characterized in that: It includes a hoisting assembly detachably connected to a steam generator (9). The hoisting assembly includes a beam body (1). A number of legs (8) are provided on the beam body (1). A lifting tackle (2) is provided at one end of the leg (8) facing the steam generator (9). A suspension seat (3) is provided at one end of the lifting tackle (2) away from the leg (8). The suspension seat (3) is detachably connected to the steam generator (9). A towing tackle (6) is provided on the top surface of one end of the suspension seat (3) facing the center of the steam generator (9). A counterweight (5) is fixedly connected to one end of the towing tackle (6) away from the suspension seat (3). The counterweight (5) is arranged below the beam body (1).

2. The lifting tool dedicated to a nuclear power steam generator according to claim 1, characterized in that: The number of the legs (8) are arranged at equal intervals.

3. The lifting tool dedicated to nuclear power steam generators according to claim 1, wherein: Both sides of one end of the suspension seat (3) in contact with the steam generator (9) are respectively fixedly connected with backing plates (7). The backing plates (7) are detachably connected to the steam generator (9).

4. The lifting tool dedicated to nuclear power steam generators according to claim 1, characterized in that: A turnbuckle is provided on the lifting tackle (2). The turnbuckle is arranged between the beam body (1) and the suspension seat (3).

5. The hoisting tool dedicated to a nuclear power steam generator according to claim 1, wherein: The towing tackle (6) is wound with a fixed pulley (4).

6. The hoisting tool dedicated to a nuclear power steam generator according to claim 5, characterized in that: The fixed pulley (4) is arranged below the beam body (1).

7. The lifting tool dedicated to nuclear power steam generators according to claim 1, characterized in that: The distance between the counterweight (5) and the center of the beam body (1) is less than the distance between the lifting tackle (2) and the center of the beam body (1).

8. The lifting tool dedicated to nuclear power steam generators according to claim 1, characterized in that: A lifting ring is fixedly connected to the center of the top surface of the beam body (1).

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