CN219202777U

CN219202777U - Neutron source ray shielding device

Info

Publication number: CN219202777U
Application number: CN202320150929.7U
Authority: CN
Inventors: 秦友军; 邹财军; 郭远; 潘锐; 赵宏宇; 郑少鹏; 于东升; 朱维; 崔学江; 杨鸿超
Original assignee: China Oilfield Services Ltd
Current assignee: China Oilfield Services Ltd
Priority date: 2023-01-12
Filing date: 2023-01-12
Publication date: 2023-06-16
Anticipated expiration: 2033-01-12

Abstract

The utility model discloses a neutron source ray shielding device, which solves the technical problem of great harm of neutron rays to staff. The device includes two semi-annular protective housing, every the inside of protective housing all is filled with the shielding piece, two the protective housing is articulated mutually, and can splice into the annular cover and establish on the source pole, two the protective housing passes through the locking piece and connects. The utility model can improve the shielding effect on the neutron rays, thereby improving the protection effect on the personal safety of staff.

Description

Neutron source ray shielding device

Technical Field

The utility model belongs to the technical field of logging devices, and particularly relates to a neutron source ray shielding device.

Background

Well logging methods that utilize various effects of neutron and formation interactions to study formation properties of a borehole profile are collectively referred to as neutron logging. In logging, it is necessary to manually load and unload the 18CI neutron source into the instrument, and to use the source rod to load and unload the neutron source when the instrument is calibrated, and fast neutrons are emitted to the stratum by the neutron source of the instrument.

However, neutron radiation belongs to a carcinogen, and when a worker dismounts a neutron source, a human body is almost exposed to the radiation of the neutron source, so that the harm to the human body is relatively large. Therefore, the device capable of effectively shielding the neutron rays in the process of assembling and disassembling the neutron source has important significance.

Disclosure of Invention

In order to solve all or part of the problems, the utility model aims to provide a neutron source ray shielding device which can improve the shielding effect on neutron rays and protect the personal safety of staff.

The utility model provides a neutron source ray shielding device which comprises two semi-annular protective shells, wherein shielding blocks are filled in each protective shell, the two protective shells are hinged and can be spliced into a ring and sleeved on a source rod, and the two protective shells are connected through a locking piece.

Optionally, the outer diameter of the protective shell is not less than 102mm.

Optionally, the thickness of the protective shell is not less than 12mm.

Optionally, the wall thickness of the protective shell is no greater than 1mm.

Optionally, the protective shell is made of stainless steel material.

Optionally, the shielding block is made of lead-boron polyethylene plate.

Optionally, the locking piece includes support frame, locking plate and bolt, the support frame is fixed in on one of them the protective housing, the locking plate is fixed in on another the protective housing, the bolt is used for fixing the support frame with the locking plate.

Optionally, the screw rod of bolt articulates in on the support frame, offer on the locking plate and supply the breach that the screw rod card of bolt was gone into, the nut of bolt is used for compressing tightly on the locking plate.

Optionally, the nut of the bolt adopts a butterfly nut.

According to the technical scheme, the neutron source ray shielding device provided by the utility model has the following advantages:

the device utilizes protective housing and shielding piece to block and shield the neutron ray, improves the shielding effect of neutron ray, reduces the harm of neutron ray to staff to improve the protection effect to staff's personal safety. Moreover, this design makes shielding device and source pole can form detachable construction, installs when using, and the use-up is removable, simple operation improves work efficiency. Meanwhile, after the device is arranged on the source rod, the loading and unloading flow of the neutron source is not influenced, the loading and unloading time is not additionally increased, and the operation convenience and the working efficiency are further improved.

Additional features and advantages of the utility model will be set forth in the description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate and do not limit the utility model.

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present utility model;

FIG. 2 is a cross-sectional view of a protective enclosure according to an embodiment of the utility model;

fig. 3 is a side view of a protective enclosure in an embodiment of the utility model.

Reference numerals illustrate:

1. a protective shell; 2. a shielding block; 3. a locking member; 31. a support frame; 32. a locking plate; 33. a bolt; 4. and (5) a notch.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in detail hereinafter with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be arbitrarily combined with each other.

Referring to fig. 1, 2 and 3, an embodiment of the present utility model is disclosed, in which a neutron source ray shielding device includes two semi-annular protective cases 1, and each protective case 1 is hollow and filled with a shielding block 2. The two protective shells 1 are hinged and can be spliced into an annular sleeve to be arranged on a source rod, and meanwhile, the two protective shells 1 are connected through the locking piece 3, so that the two protective shells 1 can form a detachable structure with the source rod.

According to the neutron source ray shielding device in the embodiment, the shielding effect of the neutron rays is improved by blocking and shielding the neutron rays through the protective shell 1 and the shielding block 2, the harm of the neutron rays to staff is reduced, and accordingly the personal safety protection effect of the staff is improved.

In one embodiment, as shown in fig. 2 and 3, the outer diameter of the protective housing 1 is not less than 102mm, the thickness is not less than 12mm, and the wall thickness is not more than 1mm, in this embodiment, the outer diameter of the protective housing 1 is 102mm, the inner diameter is 31.5mm, the thickness is 12mm, the wall thickness is 1mm, and the outer diameter 101mm, the inner diameter 32.5mm, and the thickness 10mm of the shielding block 2. Of course, in other embodiments, the outer diameter and thickness of the protective housing 1 may be increased according to actual requirements, so that the size and thickness of the shielding block 2 may be increased, and the shielding range and shielding effect of the neutron ray may be further improved.

In one embodiment, as shown in fig. 1 and 2, the protective housing 1 is made of stainless steel, and in this embodiment, the stainless steel is preferably 304 stainless steel, and in other embodiments, stainless steel of other types may be selected, and other metal materials may be selected, which will not be described herein.

In one embodiment, as shown in fig. 1 and 2, the shielding block 2 is made of a lead-boron polyethylene plate, and in the lead-boron polyethylene plate in this embodiment, the lead content is more than 10% and the boron content is more than 40%, so that neutron rays can be shielded by more than 50%, and the protection effect on staff is improved. Of course, other shielding materials may be selected in other embodiments, as long as good shielding of the neutron rays is achieved.

In one embodiment, as shown in fig. 1 and 2, the locking member 3 includes a supporting frame 31, a locking plate 32, and a bolt 33, the supporting frame 31 is fixed to one of the protective cases 1, the locking plate 32 is fixed to the other protective case 1, and the bolt 33 is used for fixing the supporting frame 31 and the locking plate 32.

In one embodiment, as shown in fig. 1 and 2, the screw of the bolt 33 is hinged on the supporting frame 31, the locking plate 32 is provided with a notch 4 for the screw of the bolt 33 to be clamped in, the nut of the bolt 33 is used for being pressed on the locking plate 32, and the nut of the bolt 33 adopts a butterfly nut, so that the quick tightening of the nut by a worker is facilitated.

According to the process, the shielding effect of the neutron rays is improved by blocking and shielding the neutron rays by the protective shell 1 and the shielding block 2, the harm of the neutron rays to the staff is reduced, and the personal safety protection effect of the staff is improved.

Meanwhile, the shielding device and the source rod can form a detachable structure, the shielding device is installed during use, the shielding device is detached after being used up, the operation is convenient, and the working efficiency is improved. Moreover, after the device is arranged on the source rod, the loading and unloading flow of the neutron source is not influenced, the loading and unloading time is not additionally increased, and the operation convenience and the working efficiency are further improved. Of course, this design is also applicable to other radioactive source containing devices such as cables, and is not limited to shielding the neutron source of the logging instrument.

It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. In the description of the present utility model, the meaning of "plurality" is two or more unless specifically defined otherwise.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model, and are intended to be included within the scope of the appended claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present utility model is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. The utility model provides a neutron source ray shielding device, its characterized in that includes two semi-annular protective housing (1), every the inside of protective housing (1) all is filled with shielding piece (2), two protective housing (1) articulated mutually, and can splice into annular cover and establish on the source pole, two protective housing (1) are connected through locking piece (3).

2. The neutron source radiation shielding device according to claim 1, wherein the outer diameter of the protective shell (1) is not smaller than 102mm.

3. Neutron source radiation shielding device according to claim 2, characterised in that the thickness of the protective shell (1) is not less than 12mm.

4. Neutron source radiation shielding device according to claim 1, characterised in that the wall thickness of the protective shell (1) is not more than 1mm.

5. The neutron source radiation shielding device according to claim 1, wherein the protective shell (1) is made of stainless steel material.

6. The neutron source radiation shielding device according to claim 1, wherein the shielding block (2) is made of lead-boron polyethylene plate.

7. The neutron source radiation shielding device according to claim 1, wherein the locking element (3) comprises a supporting frame (31), a locking plate (32) and a bolt (33), the supporting frame (31) is fixed on one of the protective shells (1), the locking plate (32) is fixed on the other protective shell (1), and the bolt (33) is used for fixing the supporting frame (31) and the locking plate (32).

8. The neutron source ray shielding device according to claim 7, wherein the screw of the bolt (33) is hinged on the supporting frame (31), the locking plate (32) is provided with a notch (4) for the screw of the bolt (33) to be clamped in, and the nut of the bolt (33) is used for being pressed on the locking plate (32).

9. The neutron source ray shielding device according to claim 7, characterized in that the nut of the bolt (33) adopts a wing nut.