CN217667371U

CN217667371U - Neutron flux tube positioning device

Info

Publication number: CN217667371U
Application number: CN202123065428.9U
Authority: CN
Inventors: 赵金; 呼征宇; 钟杰; 杨思韵; 王诗瑞; 苏立
Original assignee: China Jianzhong Nuclear Fuel Co Ltd
Current assignee: China Jianzhong Nuclear Fuel Co Ltd
Priority date: 2021-12-08
Filing date: 2021-12-08
Publication date: 2022-10-28
Anticipated expiration: 2031-12-08

Abstract

The utility model provides a neutron flux tube positioner, including the taper pin, the below of taper pin has the toper portion, the taper pin from the bottom up is equipped with bloated ring, support sleeve, fender ring and nut in proper order to the cover, be equipped with the butterfly piece on the nut. The utility model provides a neutron flux tube positioner has improved production efficiency, makes things convenient for personnel to operate, and increase of service life guarantees product quality, adapts to mass production's needs.

Description

Neutron flux tube positioning device

Technical Field

The utility model relates to a nuclear fuel assembly skeleton makes technical field, especially relates to a neutron flux tube positioner.

Background

In the manufacturing process of the fuel assembly framework, the framework welding is an extremely important ring, and when the neutron flux tube is assembled and welded, the neutron flux tube needs to be fixed on the lower tube seat, so that the size of the neutron flux tube can meet the technical requirements when the welding is finished, and the position of the neutron flux tube can be prevented from moving axially in the welding process.

When the method is used, firstly, due to inaccurate control of the force of a wrench by personnel, the flux tube can be damaged to a certain extent; secondly, in the operation process, the expansion pin is easy to be over expanded, and the service life of the expansion pin is shortened; thirdly, when assembling or dismantling the positioner, use the spanner to operate and probably injure the lower tube socket, damage the skeleton and also bring inconvenience for the operator simultaneously, influence production efficiency.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art defect to a neutron flux tube positioner is provided, this neutron flux tube positioner has improved production efficiency, makes things convenient for personnel's operation, increase of service life guarantees product quality, adapts to mass production's needs.

In order to achieve the above object, the present invention provides the following technical solutions:

the utility model provides a neutron flux tube positioner, includes the toper round pin, the below of toper round pin has the toper portion, toper round pin from the bottom up overlaps in proper order and is equipped with bloated ring, support sleeve, fender ring and nut, be equipped with the butterfly piece on the nut.

In one embodiment, a threaded portion is provided above the tapered portion, and the nut is coupled to the threaded portion.

As a practical way, the butterfly pieces are 2 in number and arranged on the side wall of the nut at 180 °.

As a practical way, a handle is connected to the top of the taper pin.

As an embodiment, a pin is provided on the conical portion, which pin is arranged perpendicularly through the conical portion.

As a practical matter, the pin is centrosymmetric about the axis of the conical portion.

As an implementable mode, the top of the expansion ring is downwards provided with 6 first notches, and the first notches are communicated with the inner wall and the outer wall of the expansion ring.

As a practical manner, 6 of the first notches are arranged uniformly at 60 °.

As an implementation mode, the bottom of the expansion ring is upwards provided with 4 second notches, and the second notches are communicated with the inner wall and the outer wall of the expansion ring.

Compared with the prior art, the utility model provides a neutron flux tube positioner has following beneficial effect:

the neutron flux tube positioning device provided by the utility model does not need to screw the expansion pin by hands of an operator, and the flux tube cannot be damaged to a certain extent due to excessive force; the service life of the neutron flux tube positioning device is obviously prolonged; when the positioning device is assembled or disassembled, the lower tube seat can not be damaged by manual operation, and meanwhile, the improved expansion pin is convenient to screw and disassemble, so that the assembling and disassembling time is shortened, and the production efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a neutron flux tube positioning device according to an embodiment of the present invention during assembly;

fig. 2 is a bottom view of a neutron flux tube positioning device provided in an embodiment of the present invention;

fig. 3 is a top view of an inflatable ring provided by an embodiment of the present invention;

fig. 4 is a side view of an inflatable ring according to an embodiment of the present invention.

Description of the reference numerals:

1. a tapered pin; 2. an expansion ring; 3. a support sleeve; 4. a baffle ring; 5. a nut; 6. a butterfly-shaped piece; 7. a handle; 8. a pin; 9. a first notch; 10. a second notch; 11. a lower tube seat; 12. neutron flux tube.

Detailed Description

While the neutron flux tube positioning device of the present invention may be embodied in many different forms, exemplary embodiments will be described in detail herein with reference to the accompanying drawings, it being understood that the description herein should be considered as illustrating the structure of the neutron flux tube positioning device and is not intended to limit the scope of the present invention to the exemplary embodiments. Accordingly, the drawings and description of the specific embodiments are to be regarded as illustrative in nature, and not as restrictive.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer", "horizontal", "vertical", and the like herein indicate orientations and positions only for convenience of description of the present invention and to simplify the description, but do not indicate or imply that the device or component referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The following is a more detailed description of the present invention by way of specific embodiments.

As shown in fig. 1 and fig. 2, the utility model provides a neutron flux tube positioning device, including taper pin 1, bulging ring 2, support sleeve 3, fender ring 4 and nut 5, be equipped with butterfly piece 6 on the nut 5. The conical pin 1 has a conical portion below, and the radial dimension of the conical portion increases gradually from bottom to top. The conical part is sequentially sleeved with an expansion ring 2, a support sleeve 3, a baffle ring 4 and a nut 5 from bottom to top. The tapered portion is a lower portion of the tapered pin 1. The neutron flux tube 12 extends into the lower tube seat 11, the conical part extends into the neutron flux tube 12, and the expansion ring 2 and the support sleeve 3 which are sleeved on the conical part also extend into the neutron flux tube 12. Preferably, the expander ring 2 and the support sleeve 3 can be against the inner wall of the neutron flux tube 12. The baffle ring 4 is attached to the lower end face of the lower tube seat 11, and the nut 5 is attached to the baffle ring 4. And twisting the butterfly-shaped sheet 6 on the nut 5 to drive the nut 5 to rotate, so that the conical pin 1 moves in the direction away from the lower tube seat, and the conical surface of the conical pin 1 expands the expansion ring 2, thereby tightly fixing the neutron flux tube 12 with the lower tube seat 11.

Preferably, the butterfly flaps 6 are 2 in number and are arranged at 180 ° on the side wall of the nut 5, so as to facilitate the handling of the butterfly flaps 6 by the user and to be more labour-saving. Handle 7 is installed at the top of taper round pin 1, and handle 7 is perpendicular with taper round pin 1, and handle 7 transversal weld is terminal in well core rod, plays the effect of taking steady fixed frock as the handle.

The whole length of the taper pin 1 is smaller than the central rod of the expansion pin of the positioning device in the prior art, so that the use of a shoulder screw torque wrench is more convenient.

The tapered portion is provided with a pin 8, the pin 8 is vertically arranged through the tapered portion, and the pin 8 is centrosymmetric about the axis of the tapered portion. That is to say, the lower half of toper portion has seted up the through-hole, and installation pin 8 in the through-hole, and pin 8's evenly distributed is in the through-hole to both ends stretch out the through-hole outside the length the same.

As shown in fig. 3 and 4, the top surface of the expanding ring 2 is provided with 6 uniformly spaced first notches 9, and the first notches 9 are elongated grooves. First breach 9 does not run through the top and the bottom that the ring 2 was moulded to the inflation, and first breach 9 intercommunication is moulded the inner wall and the outer wall of ring 2 with the inflation. That is, the first notches 9 are not arranged through in the axial direction of the expander ring 2, but in the radial direction of the expander ring 2. The 6 first notches 9 are evenly arranged on the expander ring 2 at 60 degrees.

The bottom of the expanding ring 2 is provided with 4 second gaps 10 upwards, and the second gaps 10 are elongated grooves. The second notch 10 communicates between the inner and outer wall of the expanding ring 2. The second notch 10 does not go through the top and bottom of the expander ring 2, i.e. the second notch 10 does not go from the bottom surface to the top surface of the expander ring 2.

The dovetail fastening device replaces a fastening nut in the prior art, the expansion pin is not screwed by a wrench, and the expansion pin is screwed by hands, so that the risk of damage to the product caused by the expansion pin is reduced; the two butterfly-shaped pieces are welded on the dovetail fastening device in a wing shape, so that the contact area between a hand and the fastening device is increased, the two butterfly-shaped pieces can be pulled by the hand to rotate the fastening device, and the expansion pin is pushed by the fastening device to expand and fix; with the well core rod of original positioner round pin cut short to it is terminal in well core rod to transversely weld after the cutting is polished, plays the effect of taking steady fixed frock as the handle, simultaneously because the length of core rod shortens, the use of the shoulder screw moment spanner of being more convenient for. An operator can tighten the expansion pin by hand, so that the flux tube cannot be damaged to a certain degree due to excessive force; the service life of the neutron flux tube positioning device is obviously prolonged; when the positioning device is assembled or disassembled, the lower tube seat can not be damaged by manual operation, and meanwhile, the improved expansion pin is convenient to screw and disassemble, so that the assembling and disassembling time is shortened, and the production efficiency is improved.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a neutron flux tube positioner, its characterized in that includes toper round pin (1), the below of toper round pin (1) has the toper portion, toper round pin (1) from the bottom up overlaps in proper order and is equipped with bloated ring (2), support sleeve (3), fender ring (4) and nut (5), be equipped with butterfly piece (6) on nut (5).

2. The neutron flux tube positioning device according to claim 1, wherein a threaded portion is provided above the tapered portion, and the threaded portion is connected to the nut (5).

3. The neutron flux tube positioning device according to claim 1, characterized in that the butterfly tabs (6) are 2 in number and are arranged on the side wall of the nut (5) at 180 °.

4. The neutron flux tube positioning device of claim 1, wherein a handle (7) is attached to the top of the tapered pin (1).

5. The neutron flux tube positioning device of claim 1, wherein a pin (8) is provided on the tapered portion, the pin (8) being disposed vertically through the tapered portion.

6. The neutron flux tube positioning device of claim 5, wherein the pin (8) is centrosymmetric about an axis of the cone.

7. The neutron flux tube positioning device according to claim 1, wherein the top of the bulging ring (2) is downwardly opened with 6 first notches (9), and the first notches (9) communicate the inner wall and the outer wall of the bulging ring (2).

8. The neutron flux tube positioning device of claim 7, wherein 6 of the first notches (9) are uniformly arranged at 60 °.

9. The neutron flux tube positioning device according to claim 1, wherein the bottom of the swelling ring (2) is opened with 4 second notches (10) upward, and the second notches (10) communicate the inner wall and the outer wall of the swelling ring (2).