CN215866502U

CN215866502U - A calibration device for VVER horizontal steam generator eddy current inspection

Info

Publication number: CN215866502U
Application number: CN202121619416.3U
Authority: CN
Inventors: 刘欣; 刘飞越; 包磊; 王家建; 畅雷; 王梦璐
Original assignee: China Nuclear Power Operation Technology Corp Ltd
Current assignee: China Nuclear Power Operation Technology Corp Ltd
Priority date: 2021-07-16
Filing date: 2021-07-16
Publication date: 2022-02-18
Anticipated expiration: 2031-07-16

Abstract

The utility model discloses a calibration device for VVER horizontal steam generator eddy current inspection, which comprises a fixing module, a supporting rod and a supporting module, wherein one end of the supporting rod is connected with the fixing module, and the other end of the supporting rod is connected with the supporting module. The utility model has the beneficial effects that: in VVER horizontal steam generator eddy current testing, the design of calibration pipe support device has been used and has reached following effect: 1) the start calibration and the end calibration can be carried out at any time, so that the working flexibility is improved; 2) the device is not interfered by external environment, the problem that the calibration work cannot be carried out due to the influence of the ray inspection and other reasons is avoided, and the working efficiency is improved; 3) the workload of the members of the team is reduced, and the cost is reduced and the efficiency is improved.

Description

A calibration device for VVER horizontal steam generator eddy current inspection

Technical Field

The utility model belongs to a nondestructive testing device for a horizontal steam generator of a nuclear power station, and particularly relates to a calibration device for eddy current inspection of a VVER horizontal steam generator.

Background

In a nuclear power plant, steam generator heat transfer tubes are an important component of the primary circuit pressure boundary, and the pressure boundary area accounts for 70% or more of the primary circuit boundary. A large number of regularly distributed pipe holes on the connecting belt form rigid connection through expansion joint and work in the high-temperature, high-pressure and high-radiation environment, the heat transfer pipe and the connecting belt are main components of the steam generator in accidents, and particularly the root of the heat transfer pipe is close to the connecting belt. The heat transfer tubes of the steam generator are periodically subjected to pre-service inspection and in-service inspection in domestic and foreign nuclear power countries.

The eddy current inspection of the heat transfer tube of the horizontal steam generator is completed, before the acquisition is started and when the acquisition is finished, workers are required to enter a work site for calibration, the work efficiency of the eddy current inspection is reduced, the workload and the work cost are increased, and in the radiographic inspection process, the workers cannot enter the site for calibration, so that the inspection period of a project group is prolonged.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a calibration device for VVER horizontal steam generator eddy current inspection, which can effectively reduce the workload and improve the working efficiency.

The technical scheme of the utility model is as follows: the utility model provides a calibration device for be used for horizontal steam generator eddy current inspection of VVER, includes fixed module, bracing piece and support module, one end and the fixed module of bracing piece be connected, the other end and the support module of bracing piece be connected.

The fixing module comprises a T-shaped block base, a positioning block, a first screw and a second screw, and the top end of the T-shaped block base is fixedly connected with the positioning block of the plate-shaped structure through the first screw and the second screw.

The cross section of the T-shaped block base is T-shaped.

The T-shaped block base is made of metal with high strength.

One end of the supporting rod is fixed on the positioning block through welding, and the other end of the supporting rod is connected with a supporting plate with 4 threaded holes through welding.

The supporting plate is a stainless steel plate.

The supporting rod is made of metal materials with higher strength.

The support module comprises a shielding V-shaped block and four countersunk bolts.

The shielding V-shaped block is made of a non-conductive material.

The four countersunk head bolts comprise a first countersunk head bolt, a second countersunk head bolt, a third countersunk head bolt and a fourth countersunk head bolt, and the first countersunk head bolt, the second countersunk head bolt, the third countersunk head bolt and the fourth countersunk head bolt are fixed with the supporting plate and the supporting module which are connected together with the supporting rod.

The utility model has the beneficial effects that: in VVER horizontal steam generator eddy current testing, the design of calibration pipe support device has been used and has reached following effect:

1) the start calibration and the end calibration can be carried out at any time, so that the working flexibility is improved;

2) the device is not interfered by external environment, the problem that the calibration work cannot be carried out due to the influence of the ray inspection and other reasons is avoided, and the working efficiency is improved;

3) the workload of the members of the team is reduced, and the cost is reduced and the efficiency is improved.

Drawings

FIG. 1 is a schematic view of a calibration device for vortex inspection of a VVER horizontal steam generator according to the present invention;

fig. 2 is a schematic view of a support module.

In the figure, a T-shaped block base is 1, a positioning block is 2, a first screw is 3, a second screw is 4, a supporting rod is 5, a shielding V-shaped block is 6, a fixing module is A, a supporting module is B, a first countersunk head bolt is 7, a second countersunk head bolt is 8, a third countersunk head bolt is 9, and a fourth countersunk head bolt is 10.

Detailed Description

The utility model is described in further detail below with reference to the figures and the embodiments.

According to the calibration device for the vortex inspection of the VVER horizontal type steam generator, after the hoisting and wiring of the vortex inspection equipment are completed, the calibration device is installed in the upright rail, and the calibration pipe required by the vortex inspection is fixed, so that a worker does not need to perform manual calibration in the whole data acquisition process, and the working efficiency is improved.

As shown in FIG. 1, a calibration device for VVER horizontal steam generator eddy current inspection comprises a fixing module A, a support rod 5 and a support module B, wherein one end of the support rod 5 is connected with the fixing module A, and the other end of the support rod 5 is connected with the support module B.

The fixing module A comprises a T-shaped block base 1, a positioning block 2, a first screw 3 and a second screw 4, the module is made of metal with high strength (stainless steel in the embodiment of the utility model), and the stability of the fixing module A is guaranteed. The cross section of the T-shaped block base 1 is T-shaped, and the top end of the T-shaped block base 1 is fixedly connected with the positioning block 2 of the plate-shaped structure through a first screw 3 and a second screw 4.

The T-shaped block base 1 is arranged into the upright rail through the top of the upright, and when the T-shaped block base reaches the proper position of the rail, the first screw 3 and the second screw 4 on the positioning block 2 are fastened to complete the installation of the fixing module. The module can freely adjust the height as required, and the thread bottoms of the first screw 3 and the second screw 4 are damaged by spot welding, so that the problem that the screws fall off to the manifold hole due to misoperation is avoided, and foreign matter prevention measures are strengthened.

One end of a support rod 5 is fixed on the positioning block 2 through welding, the connecting position of the support rod 5 and the support module B is determined by the position of a probe door of the eddy current inspection equipment, the other end of the support rod 5 is connected with a support plate with 4 threaded holes through welding, and the support plate is a stainless steel plate (connected with the support module B). The support rod 5 is made of a metal material having a high strength (stainless steel in the embodiment of the present invention) to ensure the stability of the support rod.

As shown in fig. 2, the support module B includes a shielding V-block 6 and four countersunk bolts. The shielding V-shaped block 6 is made of a non-conductive material (in the embodiment of the utility model, a high polymer material such as nylon) and is used for shielding external interference signals and ensuring the accuracy of the calibration pipe signals. First countersunk head bolt 7, second countersunk head bolt 8, third countersunk head bolt 9, fourth countersunk head bolt 10 will be fixed with backup pad and support module B that bracing piece 5 links together, and the use of countersunk head bolt has effectively avoided the fixed problem that is blocked or places not in place when the calibration pipe.

When the device is used, a needed calibration pipe is fixed in the shielding V-shaped block 6, and an acquisition person successfully realizes automatic acquisition of calibration pipe data by controlling the position of the probe door through a computer.

Claims

1. A calibration device for VVER horizontal steam generator eddy current inspection which characterized in that: the supporting device comprises a fixing module, a supporting rod and a supporting module, wherein one end of the supporting rod is connected with the fixing module, and the other end of the supporting rod is connected with the supporting module.

2. The calibrating apparatus for VVER horizontal steam generator eddy current inspection as claimed in claim 1, wherein: the fixing module comprises a T-shaped block base, a positioning block, a first screw and a second screw, and the top end of the T-shaped block base is fixedly connected with the positioning block of the plate-shaped structure through the first screw and the second screw.

3. The calibrating apparatus for VVER horizontal steam generator eddy current inspection as claimed in claim 2, wherein: the cross section of the T-shaped block base is T-shaped.

4. The calibrating apparatus for VVER horizontal steam generator eddy current inspection as claimed in claim 2, wherein: the T-shaped block base is made of metal with high strength.

5. The calibrating apparatus for VVER horizontal steam generator eddy current inspection as claimed in claim 1, wherein: one end of the supporting rod is fixed on the positioning block through welding, and the other end of the supporting rod is connected with a supporting plate with 4 threaded holes through welding.

6. The calibration device for VVER horizontal steam generator eddy current inspection as claimed in claim 5, wherein: the supporting plate is a stainless steel plate.

7. The calibrating apparatus for VVER horizontal steam generator eddy current inspection as claimed in claim 1, wherein: the supporting rod is made of metal materials with higher strength.

8. The calibrating apparatus for VVER horizontal steam generator eddy current inspection as claimed in claim 1, wherein: the support module comprises a shielding V-shaped block and four countersunk bolts.

9. The calibration device for VVER horizontal steam generator eddy current inspection as claimed in claim 8, wherein: the shielding V-shaped block is made of a non-conductive material.

10. The calibration device for VVER horizontal steam generator eddy current inspection as claimed in claim 8, wherein: the four countersunk head bolts comprise a first countersunk head bolt, a second countersunk head bolt, a third countersunk head bolt and a fourth countersunk head bolt, and the first countersunk head bolt, the second countersunk head bolt, the third countersunk head bolt and the fourth countersunk head bolt are fixed with the supporting plate and the supporting module which are connected together with the supporting rod.