CN212123081U

CN212123081U - Fuel cladding tube tamponade roller guide sleeve

Info

Publication number: CN212123081U
Application number: CN201922205025.6U
Authority: CN
Inventors: 王云波; 陈旭; 于宏生; 王连之; 刘春梅; 任慧
Original assignee: Cnnc Baotou Nuclear Fuel Co ltd; China North Nuclear Fuel Co Ltd
Current assignee: Cnnc Baotou Nuclear Fuel Co ltd; China North Nuclear Fuel Co Ltd
Priority date: 2019-12-11
Filing date: 2019-12-11
Publication date: 2020-12-11
Anticipated expiration: 2029-12-11

Abstract

The utility model belongs to a sleeve, concretely relates to fuel cladding pipe tamponade gyro wheel guide sleeve. A fuel cladding tube corking roller guide sleeve comprises a base, wherein an end plug storage rack is arranged on the base, and a roller assembly is arranged on the end plug storage rack and used for guiding a fuel cladding tube. This neotype effect that is showing is: 1) the roller type guide sleeve and the original equipment are installed on the basis to ensure that the neutral deviation meets the requirement of 0.01-0.08 mm. 2) The sensor can realize effective detection of the entering and the entering of the workpiece, and the detection efficiency is 100%. 3) The new roller type guide sleeve is adopted for tamponade, scratches are eliminated, and the product quality is improved from 50% to 100%.

Description

Fuel cladding tube tamponade roller guide sleeve

Technical Field

The utility model belongs to a sleeve, concretely relates to fuel cladding pipe tamponade gyro wheel guide sleeve.

Background

The fuel rod needs to be subjected to fuel cladding tube pressing and plugging operation before being welded, the pressing and plugging process has large influence on welding, wherein the influence comprises scratches, dirt adhesion, centering property and the like, therefore, the pressing and plugging process is a key process before welding, the key component influencing the quality of a pressing and plugging product is a guide sleeve, the fuel rod is sent into the pressing and plugging guide sleeve, and the pushing rod pushes the end plug to complete the pressing and plugging process of the fuel cladding tube in the pressing and plugging guide barrel.

After corking, the fuel rod nozzle developed surface scratches, as shown in FIG. 1:

the surface scratches cannot be completely covered by the weld after welding, resulting in a scratch defect on the surface. When ultrasonic detection is carried out, the rejection rate is as high as 50%.

Through a great deal of experimental research, the problem that the scratch defect of the outer surface is caused by final analysis is that in the design of the guide sleeve of the plug press, in order to detect that the end plug is in place, the guide sleeve adopts an M8 proximity sensor. As shown in fig. 2.

The machining precision required by the guide hole of the sensor, which is contacted with the end plug, is not more than 0.8Ra, a 'corner area' is formed between the sensor mounting hole and the guide hole, and a mechanical scratch is formed at the part of the fuel rod contacted with the 'corner area' in the plugging process, and the scratch causes the generation of a large number of unqualified products.

Novel content

The present invention is directed to the shortcomings of the prior art and provides a fuel cladding tube corking roller guide sleeve.

This is novel to realize like this: a fuel cladding tube corking roller guide sleeve comprises a base, wherein an end plug storage rack is arranged on the base, and a roller assembly is arranged on the end plug storage rack and used for guiding a fuel cladding tube.

A fuel cladding tube corking roller guide sleeve as described above, wherein said roller assembly comprises a corking roller guide sleeve with a roller bearing disposed thereon and a spring retainer assembly disposed thereon.

A fuel cladding squeeze roller guide sleeve as described above, wherein said fuel cladding forward end is provided with a cavity spring which mates with said spring retainer assembly.

A fuel cladding squeeze roller guide sleeve as described above, wherein said spring retainer assembly comprises a spring retainer and a spring retainer retaining pin for retaining the spring retainer on the roller bearing.

The fuel cladding tube corking roller guide sleeve as described above, wherein the front of the corking roller guide sleeve is provided with a locating hole shaft, the upper side of the corking roller guide sleeve is provided with an end plug locator, and the side wall of the corking roller guide sleeve is provided with a sensor locating hole.

A fuel cladding squeeze roller guide sleeve as described above wherein bearing pins are provided on the roller bearings.

The fuel cladding tube press plug roller guide sleeve is characterized in that a plurality of roller mounting holes are formed in the roller bearing, a plurality of spring locator mounting holes are formed in the roller bearing, and the end part of the roller bearing is in a cone frustum shape which is opened and tightened, so that a fuel cladding tube leading-in hole is formed.

The fuel cladding tube pressing plug roller guide sleeve is characterized in that the pressing plug roller guide sleeve is provided with an end plug positioning hole and an end plug guide hole respectively, the front end of the end plug guide hole is provided with a slope angle, and the front end of the slope angle is provided with a cladding entering chamfer.

The fuel cladding tube plug roller guide sleeve as described above, wherein the plug locator is provided in the plug locating hole, the plug locator is composed of three parts, a cylinder type with thicker top, a cylinder type with thinner middle and a conical shape with the lowest bottom, wherein the conical shape forms the plug locating end face, and the top surface of the cylinder type with thicker top is provided with the compression spring locating hole.

A fuel cladding squeeze roller guide sleeve as described above, wherein said spring locating means comprises a spring locator mounting hole, a spring locating roller and a roller pin.

This neotype effect that is showing is: 1) the roller type guide sleeve and the original equipment are installed on the basis to ensure that the neutral deviation meets the requirement of 0.01-0.08 mm.

2) The sensor can realize effective detection of the entering and the entering of the workpiece, and the detection efficiency is 100%.

3) The new roller type guide sleeve is adopted for tamponade, scratches are eliminated, and the product quality is improved from 50% to 100%.

Drawings

FIG. 1 is a schematic structural view of a guide sleeve of a conventional corking machine;

FIG. 2 is a schematic view of a fuel cladding pinch roller guide sleeve according to the present application;

FIG. 3 is an enlarged fragmentary view of the lead-out of the end plug;

FIG. 4 is a partially enlarged schematic view of the positioner;

fig. 5 is a partially enlarged schematic view of the spring positioning device.

In the figure: 1, a 2M 8 sensor 3 end plug guide hole 4 end plug storage rack in a corner area; 5, a base; 6 pressing and plugging the roller guide sleeve; 7 a cavity spring; 8 a fuel cladding tube; 9 positioning the hole shaft; 10 a roller bearing; 11 bearing pins; 12 sensor positioning holes; 13 end plug locator; 14 a spring retainer; 15 fixing the pin by the spring positioner; 16 end plug positioning holes 17 end plug guide holes 18 spring locator mounting holes 19 roller mounting holes 20 fuel cladding lead-in holes 21 slope angles; 22 entering the chamfer for cladding; 23 pressing a spring positioning hole 24 and an end plug positioner 25 to form an end plug positioning end face; 26 spring positioning roller 27 roller pin 28 spring positioning means.

Detailed Description

As shown in the attached figures 2-5, a spring positioning device, a fuel cladding tube press plug roller guide sleeve,

1) the tool and the design drawing of the roller guide sleeve of the existing corker are combined for improvement and optimization, the original M8 in the hole of the sensor is determined to be changed into a phi (1-5) mm small hole (preferably phi 3mm), the end plug is positioned by the end plug positioner according to the pushing position of the end plug, and the position of the positioning hole of the sensor is determined to be capable of detecting the existence of the end plug when the end plug is pushed.

2) According to actual measurement and design, the damage of the fuel rod pipe opening during entering is optimized to be minimum, and the slope angle (preferably 3 degrees) of the pipe entering the end plug guide outlet is set to be 1-5 degrees.

3) According to the actual position of the end plug, an end plug locator installing hole and an end plug locator are designed, a phi (2.0-3.0) mm (preferably phi 2.38mm) transition circular arc is adopted for a locating end face of the locator and a contact face of the end plug, the roughness does not exceed 0.8Ra, and the surface of the end plug is guaranteed not to be scratched.

4) And designing a spring positioning device according to the size of the entering position of the spring.

And the photoelectric sensor with the diameter less than or equal to phi 4mm is matched with the roller guide sleeve for installation.

The rolling bearing and the positioning pin are matched with the roller type guide sleeve for installation and use.

According to the actual welding requirements, process development and test verification of fuel cladding pipe tamponade are carried out, and test results show that the newly designed roller type guide sleeve is suitable for the fuel cladding pipe tamponade process, and the influence of the tamponade process on welding products can be completely eliminated by matching with a centering tool. The production practice proves that the newly designed roller type guide sleeve is used, the welded product has no defects such as surface defects, internal undercut, air holes and the like, and the tamponade process is stable.

Claims

1. A fuel cladding tube corking roller guide sleeve, characterized by: the device comprises a base (5), wherein an end plug storage rack (4) is arranged on the base (5), and a roller assembly is arranged on the end plug storage rack (4) and used for guiding a fuel cladding pipe (8).

2. A fuel cladding pipe corking roller guide sleeve as claimed in claim 1, wherein: the roller assembly comprises a press-plug roller guide sleeve (6), a roller bearing (10) is arranged on the press-plug roller guide sleeve (6), and a spring positioner assembly is arranged on the roller bearing (10).

3. A fuel cladding pipe corking roller guide sleeve as claimed in claim 2, wherein: the front end of the fuel cladding tube (8) is provided with a cavity spring (7), and the cavity spring (7) is matched with the spring locator assembly.

4. A fuel cladding pipe corking roller guide sleeve as claimed in claim 3, wherein: the spring positioner assembly comprises a spring positioner (14) and a spring positioner fixing pin (15) for fixing the spring positioner (14) on the roller bearing (10).

5. A fuel cladding pipe corking roller guide sleeve as claimed in claim 4, wherein: the front of the press plug roller guide sleeve (6) is provided with a positioning hole shaft (9), the upper surface of the press plug roller guide sleeve (6) is provided with an end plug positioner (13), and the side wall of the press plug roller guide sleeve (6) is provided with a sensor positioning hole (12).

6. A fuel cladding tube corking roller guide sleeve as claimed in claim 5, wherein: a bearing pin (11) is provided on the roller bearing (10).

7. A fuel cladding pipe corking roller guide sleeve as claimed in claim 6, wherein: the roller bearing (10) is provided with a plurality of roller mounting holes (19) and a plurality of spring locator mounting holes (18), the end part of the roller bearing (10) is in a cone frustum shape opened to be tightened, and the cone frustum structure forms a fuel cladding leading-in hole (20).

8. A fuel cladding pipe corking roller guide sleeve as claimed in claim 7, wherein: an end plug positioning hole (16) and an end plug guide hole (17) are respectively arranged on the plug roller guide sleeve (6), a slope angle (21) is arranged at the front end of the end plug guide hole (17), and a cladding entering chamfer (22) is arranged at the front end of the slope angle (21).

9. A fuel cladding pipe corking roller guide sleeve as claimed in claim 8, wherein: an end plug positioner (24) is arranged in the end plug positioning hole (16), the end plug positioner (24) consists of three parts, namely a cylinder type with thick top, a cylinder type with thin middle and a cone type with the lowest bottom, wherein the cone type forms an end plug positioning end surface (25), and the top surface of the cylinder type with thick top is provided with a compression spring positioning hole (23).

10. A fuel cladding tube corking roller guide sleeve as claimed in claim 9, wherein: the sleeve also includes a spring locator device (28), the spring locator device (28) including a spring locator mounting hole (18), a spring locator roller (26), and a roller pin (27).