CN219156264U

CN219156264U - Improved loading and unloading telescopic sleeve installation and maintenance special device

Info

Publication number: CN219156264U
Application number: CN202222456327.2U
Authority: CN
Inventors: 郭红飞; 雷鸣; 孙明波
Original assignee: XI'AN NUCLEAR EQUIPMENT CO Ltd
Current assignee: XI'AN NUCLEAR EQUIPMENT CO Ltd
Priority date: 2022-09-16
Filing date: 2022-09-16
Publication date: 2023-06-09
Anticipated expiration: 2032-09-16

Abstract

The utility model belongs to overhaul device, concretely relates to improved generation loading and unloading telescopic tube installs and overhauls isolated plant. The utility model provides an improved generation loading and unloading telescopic tube installs and overhauls isolated plant, wherein, includes the hoist plate, sets up rings subassembly at the lower surface of hoist plate, sets up the electronic scale subassembly at hoist plate upper surface. The novel remarkable effect is: the telescopic sleeve special device has the advantages of simple and unique structural design, reasonable compactness and easy installation, and the special device for the telescopic sleeve has the functionality meeting the requirements through verification on products of the square home mountain system performance optimization project.

Description

Improved loading and unloading telescopic sleeve installation and maintenance special device

Technical Field

The utility model belongs to overhaul device, concretely relates to improved generation loading and unloading telescopic tube installs and overhauls isolated plant.

Background

The loading and unloading machine is one of key equipment of a fuel operation and storage system, spans over a pile cavity and a material changing water tank, runs on a track with the elevation of +20.22 along two sides of the water tank, is used for lifting fuel assemblies in a reactor plant, and is the main equipment for operating the fuel assemblies in the reactor plant. The mechanical part of the loading and unloading machine is divided into five parts, including an upper tower-shaped member, a cart, a trolley, a telescopic sleeve fixing sleeve and a rotating mechanism.

The telescopic sleeve belongs to one of the key parts of the loader. There are stringent requirements for lifting during installation and repair phases. Due to the composition and the installation sequence of the reconstructed telescopic sleeve part: suspension head, cylinder and pipe joint, gripper travel switch and trigger plate, upper rod assembly, connecting cylinder, inner cylinder, lower rod assembly, outer cylinder, gripper; the manual emergency tripping operation rod system with the staggered branches is arranged on the inner layer, and meanwhile, the manual rod for processing the faults of the cylinder operation rod is also arranged on the upper part, and the complexity of the new structure brings difficulty to the installation and repair of the telescopic sleeve. The structure is as follows: the total length of the telescopic sleeve is 7551mm, the upper suspension head tightly and effectively assembles the action cylinder into an integral drivable device through the movable pulley, the upper rod and each support plate at the upper part, the upper rod is particularly provided with an inner layer and an outer layer, the outer rod system is formed by connecting a 2-2-4 rod system branch mode from top to bottom through a middle circular plate to form a micro-controllable rod system, and the micro-controllable rod system longitudinally penetrates through the outer side of the whole inner cylinder body and the inner side of the outer cylinder body, has the integral length of about 7275mm and is mainly used for solving the problem of spring clamping stagnation of the gripping tool when the gripping tool performs unlocking action; the inner layer rod system adopts a 1-2-2 rod system branch mode, the rod system starts to suspend the head top plate, passes through the upper support plate double holes and then is fixed on the control connecting cylinder of the cylinder driving rod end, the total length of the rod system is shorter (about 800 mm), the rod system acts on the emergency tripping action of the gripping apparatus in emergency, the operable effective stroke is about 57mm, the top end of the telescopic sleeve body is connected with the suspending head, the bottom end of the telescopic sleeve body is directly connected with the gripping apparatus, and the positioning and centering precision of the loading and unloading machine in the process of gripping a fuel assembly can be directly influenced by the assembly precision of the whole mechanism and the installation of single components.

Once an underwater fault occurs during the operation of a nuclear power plant of the loading and unloading machine, the loading and unloading material before improvement needs to be emptied of boric acid water in a fuel water tank, and personnel go to the bottom for maintenance. This not only risks significant nuclear radiation to maintenance personnel, but also requires a significant amount of time for drainage and radiation protection. Great losses are caused to personnel safety and economy. The improved loading and unloading machine can independently hoist the telescopic sleeve out of the water for maintenance, so that the time for draining water is saved, and the radiation value is controlled in a lower range.

The two rails of the telescopic sleeve run in 12 sets of guide wheels on the fixed sleeve. In order to enable safe and error-free loading of the fuel assembly into the reactor core. Firstly, the plumb degree of the sleeve in two directions must be ensured to be within +/-1. And the plumb degree of the telescopic sleeve at the upper part of the water pool of 17 meters in the bottom datum is within +/-1. The telescopic sleeve is accurate in running smooth position of the guide wheel. The rim gap between the telescopic sleeve guide rail and the guide wheel is 0.2 to 0.5. By combining the technical characteristics, the telescopic sleeve must ensure the lifting plumb degree when lifting.

The above-mentioned characteristics of the telescopic sleeve make it very difficult to overhaul, so that an improved device special for installing and overhauling the telescopic sleeve for loading and unloading materials is needed.

Disclosure of Invention

The utility model provides a special device is overhauld to prior art's defect to improved generation loading and unloading telescopic tube installation.

The novel implementation is as follows: the utility model provides an improved generation loading and unloading telescopic tube installs and overhauls isolated plant, wherein, includes the hoist plate, sets up rings subassembly at the lower surface of hoist plate, sets up the electronic scale subassembly at hoist plate upper surface.

The improved loading and unloading telescopic sleeve installation and maintenance special device comprises an M30 lifting ring screw and an electronic scale arranged above the M30 lifting ring screw.

The improved loading and unloading telescopic sleeve installation and maintenance special device comprises the lifting ring assembly, the lifting ring assembly comprises the balance beam fixedly connected with the lifting plate and the M20 lifting ring screw, and a steel wire rope is arranged between the M20 lifting ring screw and the balance beam.

The improved special device for installing and overhauling the loading and unloading telescopic sleeve is characterized in that a steel wire rope clamp is arranged below the balance beam, and the steel wire rope is connected with the balance beam through the steel wire rope clamp.

The improved loading and unloading telescopic sleeve installation and overhaul special device comprises the shackle component, wherein the shackle component is arranged on the lower surface of the hanging plate.

The improved loading and unloading telescopic sleeve installation and overhaul special device comprises an M20 shackle and an M16 shackle, wherein the M20 shackle is connected with a lifting plate, and the M16 shackle is arranged below the M20 shackle.

The improved loading and unloading telescopic sleeve installation and maintenance special device comprises two M20 lifting ring screws, two steel wire rope clamps below the balance beam, two steel wire ropes, one end of each steel wire rope is connected with the corresponding M20 lifting ring screw, and the other end of each steel wire rope is connected with the corresponding steel wire rope clamp.

The novel remarkable effect is: the telescopic sleeve special device has the advantages of simple and unique structural design, reasonable compactness and easy installation, and the special device for the telescopic sleeve has the functionality meeting the requirements through verification on products of the square home mountain system performance optimization project.

Drawings

Fig. 1 is an assembly diagram of a special device for installing and overhauling an improved loading and unloading telescopic sleeve.

Fig. 2 is a schematic structural view of the usage state.

In the figure: 1. the hoisting device comprises a hoisting plate, a steel wire rope, a 3.M30 hoisting screw, a 4.M20 hoisting screw, a 5-balance beam, a 6.M20 shackle, a 7.M16 shackle, a 8-steel wire rope clamp and an 9-electronic scale.

Detailed Description

An electronic scale 9 is hung by a crane, a 3M 3t hanging belt is hung below the electronic scale, and an M30 lifting screw 3 is connected below the hanging belt and between a lifting plate of a special device for installing and overhauling the telescopic sleeve by an M20 shackle 6. The operation device slowly descends the telescopic sleeve by using a bearing rod from the shaft bottom between the two pulleys of the suspension head and is preset at the corresponding projection outline of the flange of the fixed sleeve until the telescopic sleeve is safely supported on the bearing rod and the external steel wire rope is loosened, the original steel wire rope is removed, and then the two steel wire ropes 2 connected by the special device are respectively and simultaneously penetrated out from the two pulleys. One end is connected with the lifting screw 4 on one side of the lifting plate of the device through a rope clamp 8, one end is connected with two M16 shackles 7 through the rope clamp 8, and the two shackles 7 are arranged on holes on two sides of the balance beam 5. The middle hole of the balance beam 5 is connected with the lifting screw 4 on the other side of the lifting plate M20 of the device through the shackle 7. Then the crane hook is lifted at a low speed, and the numerical change of the electronic scale is observed, namely friction force when the telescopic sleeve is lifted. The balance beam 5 plays roles of compensating the length of the steel wire rope 2 and adjusting the overlarge stress on the side of the telescopic sleeve in the process, the electronic scale has obvious numerical change in the lifting process, the situation that the balance beam 5 is low indicates which side is stressed, the position of the crane is correspondingly changed, and the balance beam 5 and the electronic scale 9 are observed, controlled within a reasonable friction range and then lifted again until the telescopic sleeve is lifted, so that the electronic scale is a concrete implementation mode of maintenance working conditions. The assembly process mainly comprises the steps of firstly assembling a suspension head, then hoisting the suspension head by using a hoisting tool, connecting the suspension head with a telescopic sleeve body, hoisting the telescopic sleeve body to a vertical position, vertically erecting the telescopic sleeve on a pool wall tool, then dismantling the suspension head to complete the assembly of the inner parts of the telescopic sleeve, and installing the suspension head back. The telescopic elastic tube is safely and reliably placed in the fixed sleeve after being integrally lifted to the corresponding position.

Claims

1. An improved loading and unloading telescopic sleeve installs and overhauls isolated plant, its characterized in that: the lifting device comprises a lifting plate (1), wherein a lifting ring assembly is arranged on the lower surface of the lifting plate (1), and an electronic scale assembly is arranged on the upper surface of the lifting plate (1);

the electronic scale assembly comprises an M30 lifting screw (3) and an electronic scale (9) arranged above the M30 lifting screw (3);

the lifting ring assembly comprises a balance beam (5) and an M20 lifting ring screw (4) which are fixedly connected with the lifting plate (1), and a steel wire rope (2) is arranged between the M20 lifting ring screw (4) and the balance beam (5).

2. An improved loading and unloading telescopic sleeve installation and maintenance special device as claimed in claim 1, wherein: a steel wire rope clamp (8) is arranged below the balance beam (5), and the steel wire rope (2) is connected with the balance beam (5) through the steel wire rope clamp (8).

3. An improved loading and unloading telescopic sleeve installation and maintenance special device as claimed in claim 2, wherein: the device also comprises a shackle component which is arranged on the lower surface of the lifting plate (1).

4. An improved loading and unloading telescopic sleeve installation and maintenance special device as claimed in claim 3, wherein: the shackle component comprises an M20 shackle (6) and an M16 shackle (7), wherein the M20 shackle (6) is connected with the lifting plate (1), and the M16 shackle (7) is arranged below the M20 shackle (6).

5. An improved loading and unloading telescopic sleeve installation and maintenance special device as defined in claim 4, wherein: the number of the M20 eye screws (4) is two, the number of the steel wire rope clamps (8) below the balance beam (5) is also two, the number of the steel wire ropes (2) is two, one end of each steel wire rope (2) is connected with the corresponding M20 eye screw (4), and the other end of each steel wire rope is connected with the corresponding steel wire rope clamp (8).