Radioactive source shell and radioactive source container

Abstract

The utility model provides a radioactive source shell which comprises a source cover and a source frame installed together with the source cover, and an inner cavity is formed inside the source cover and the source frame. The radioactive source and the shielding column are placed in the inner cavity, and the shielding column is located above the radioactive source. The utility model further provides a radioactive source container which comprises the radioactive source shell and further comprises a barrel body composed of a barrel body bottom plate, an outer barrel body and a barrel body upper cover. A shielding layer is wrapped in the barrel body, and the radioactive source shell is arranged in the shielding layer in the barrel body; and the upper part of the barrel body upper cover is also covered with a cover. According to the radioactive source shell, the length of the source frame is shortened, the shielding columns are additionally arranged, the length of the source cover is increased, the shielding effect of the top of a container is improved, after the radioactive source shell is placed in the radioactive source container, shielding bodies are arranged on the periphery, the upper portion and the lower portion of a radioactive source, and meanwhile radiation levels in all directions of the periphery of the container are almost consistent.

Description

Technical Field

[0001] The utility model relates to the technical field of radioactive source applications, in particular to a radioactive source shell and a radioactive source container. Background Art

[0002] Nuclear instruments and meters are used to measure ionizing radiation and control equipment or processes involving ionizing radiation. Therefore, they are indispensable in the utilization of nuclear technology. Nuclear instruments and meters require regular accuracy review and timely correction of errors during use, which is the purpose of nuclear instrument calibration. Nuclear instrument calibration refers to the process of measuring a radiation standard source with a nuclear instrument or measurement system to establish a relationship between the readings of the instrument or measurement system and the target element content in the radiation standard source. Standard sources are essential for instrument calibration. Because standard sources emit a certain amount of radiation, they must be placed in a shielded container during use. Furthermore, to calibrate the corresponding instrument, the standard source must be placed in a specially designed enclosure.

[0003] See Figure 1 The existing radiation source housing is composed of a source frame 102', a radiation source 103', and a source cover 101'. Since the housing has no shielding structure, when the housing containing the radiation source is placed in a container, the radiation level at the top of the container is high. Utility Model Content

[0004] In view of the above problems existing in the prior art, the present invention provides a radiation source housing, which includes:

[0005] A source cover and a source frame mounted together with the source cover, wherein the source cover and the source frame form an inner cavity;

[0006] A radiation source and a shielding column are placed in the inner cavity, and the shielding column is located above the radiation source.

[0007] In some embodiments, the bottom of the source rack is provided with an external thread, the upper portion of the source cover is provided with an internal thread matching the external thread of the bottom of the source rack, and a blind hole is provided inside the source cover to form the inner cavity.

[0008] In some embodiments, the blind hole of the source cover has a diameter consistent with that of the radiation source and the shielding column.

[0009] In some embodiments, the length of the source frame is shorter than the length of the source cover.

[0010] The present utility model also provides a radioactive source container, comprising the radioactive source shell as described above, and further comprising: a barrel body consisting of a barrel bottom plate, an outer barrel body and a barrel body upper cover; the barrel body is wrapped with a shielding layer, and the radioactive source shell is placed in the shielding layer inside the barrel body; the upper part of the barrel body upper cover is also covered with a lid.

[0011] In some embodiments, the top of the source rack is set as a source rack disk, and the central part of the barrel cover is provided with a groove and a through hole. The size of the groove is consistent with the diameter of the source rack disk, which is used to prevent the radiation source housing from shaking; the through hole is consistent with the diameter of the middle position of the source rack of the radiation source housing, and the radiation source housing is placed in the barrel body through the through hole.

[0012] In some embodiments, the source rack is provided with threaded holes, and the grooves of the barrel upper cover are correspondingly provided with threaded holes, and the source rack and the barrel upper cover are fixed by tightening screws.

[0013] In some embodiments, the outer ring of the barrel body upper cover is an external thread, the lower part of the cover is provided with an internal thread matching the external thread, and a silicone pad is provided between the barrel body upper cover and the cover.

[0014] In some embodiments, the radiation source container also includes a lifting ear, a handle and a retaining ring. Lifting ears are provided on both sides of the outer barrel body, and an annular groove is provided on one side of the lifting ear. A circular through hole is provided at the lower part of the handle. The circular through hole of the handle is passed through the lifting ears on both sides, and the retaining ring is clamped in the annular groove of the lifting ear.

[0015] Compared with the prior art, the advantages and beneficial effects of the present invention are as follows:

[0016] The radiation source housing provided by the utility model shortens the length of the source rack, adds shielding columns, increases the length of the source cover, and improves the shielding effect of the top of the container. After the radiation source housing provided by the utility model is placed in the radiation source container, the radiation source is shielded all around and above and below. At the same time, the radiation level in all directions around the container is designed to be almost consistent. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] Figure 1 This is a schematic diagram of the structure of a radioactive source housing in the prior art;

[0019] Figure 2This is a schematic diagram of the structure of the radiation source housing according to an embodiment of the present invention;

[0020] Figure 3 This is a cross-sectional schematic diagram of a radioactive source container according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the assembly of the radioactive source container shown in an embodiment of the present utility model;

[0022] in:

[0023] 101'-source cover;

[0024] 102'-source rack;

[0025] 103'-radioactive source;

[0026] 1-Radioactive source housing;

[0027] 101-source cover;

[0028] 1011-blind hole;

[0029] 102-source rack;

[0030] 1021-source rack;

[0031] 103-radioactive source;

[0032] 104-shielding column;

[0033] 2-barrel bottom plate;

[0034] 3- outer barrel;

[0035] 4-barrel cover;

[0036] 401-groove;

[0037] 402-through hole;

[0038] 5-shielding layer;

[0039] 6-lid;

[0040] 7-Silicone pad;

[0041] 8- hanging lug;

[0042] 9-Handle;

[0043] 10-Retaining ring. DETAILED DESCRIPTION

[0044] The technical solution of the present invention is described in detail below with reference to the accompanying drawings and specific embodiments to further understand the purpose, solution and effect of the present invention, but it is not intended to limit the scope of protection of the claims attached to the present invention.

[0045] Certain words are used in the specification and subsequent claims to refer to specific components or parts. A person of ordinary skill in the art should understand that technical users or manufacturers may refer to the same component or part with different nouns or terms. This specification and the subsequent claims do not use differences in names as a way to distinguish components or parts, but rather use differences in the functions of components or parts as the criteria for distinction. The words "including" and "comprising" mentioned throughout the specification and subsequent claims are open-ended terms and should be interpreted as "including but not limited to". In addition, the word "connect" here includes any direct and indirect electrical connection means. Indirect electrical connection means include connection through other devices.

[0046] It should be noted that, in the description of the present invention, the terms "horizontal", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and "approximately", or "approximately", "substantially", "left and right" and the like to indicate directions or positional relationships or parameters are all based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description content, and do not indicate or imply that the device or element referred to must have a specific direction, specific size or be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0047] See Figure 2-4 One embodiment of the present invention provides a radiation source housing 1, comprising: a source cover 101, and a source holder 102 mounted together with the source cover 101, wherein the source cover 101 and the source holder 102 define an inner cavity; a radiation source 103 and a shielding post 104, wherein the radiation source 103 and the shielding post 104 are placed in the inner cavity, and the shielding post 104 is located above the radiation source 103. The source holder 102 has an external thread at its bottom, and the source cover 101 has an internal thread matching the external thread at its top. A blind hole 1011 is provided within the source cover 101, thereby forming the inner cavity. The diameter of the blind hole 1011 in the source cover 101 is the same as that of the radiation source 103 and the shielding post 104. After the radiation source 103 and the shielding post 104 are placed in the source cover 101, the source holder is tightened to form the radiation source housing 1.

[0048] In this embodiment, the length of the source frame is shorter than that of the source cover. Compared with the prior art, the radiation source housing provided in this embodiment shortens the length of the source frame, adds a shielding column, and increases the length of the source cover.

[0049] Another embodiment of the present invention provides a radioactive source container, comprising the radioactive source housing 1 described in the preceding embodiment, and further comprising a barrel body consisting of a barrel bottom plate 2, an outer barrel body 3, and a barrel body cover 4; the barrel body is encased in a shielding layer 5, and the radioactive source housing 1 is positioned within the shielding layer 5 within the barrel body; and the barrel body cover 4 is further capped with a lid 6. In this embodiment, the barrel body bottom plate 2, outer barrel body 3, and barrel body cover 4 are welded together using argon arc welding, encasing the shielding layer 5. The barrel body bottom plate 2, outer barrel body 3, and barrel body cover 4 are all made of stainless steel, with the outer layer of stainless steel providing support and protection.

[0050] In this embodiment, the top of the source rack 102 is configured as a source rack plate 1021. The center portion of the barrel cover 4 is provided with a groove 401 and a through-hole 402. The groove 401 is the same size as the diameter of the source rack plate 1021. The source rack plate 1021 can be locked into the groove 401, preventing the radiation source housing from rocking back and forth or left and right. The through-hole 402 is the same diameter as the center portion of the source rack 102 of the radiation source housing 1. The radiation source housing 1 is inserted through the through-hole 402 and placed within the barrel. The source rack plate 1021 is provided with a threaded hole, and the barrel cover 4 has a corresponding threaded hole in the groove 401. Screws are used to secure the source rack plate 1021 and the barrel cover 4 together.

[0051] In this embodiment, the outer ring of the barrel cover 4 is an external thread, and the lower part of the lid 6 is provided with an internal thread matching it. There is a silicone pad 7 between the barrel cover 4 and the lid 6. When tightening the lid 6, the role of the silicone pad 7 is to avoid excessive force causing the thread to be tightened, and it also plays a sealing role.

[0052] The radioactive source container provided in this embodiment also includes lugs 8, a handle 9, and a retaining ring 10. The lugs 8 are provided on either side of the outer barrel 3 and are integrally joined to the outer barrel 3 using argon arc welding. The lugs 8 are cylindrical and have an annular groove on one side. The handle 9 has a defined width and thickness, enhancing hand comfort during use. A circular through-hole, sized to the diameter of the lug 8, is provided at the bottom of the handle 9. The circular through-hole of the handle 9 passes over the lugs 8 on either side, retaining the retaining ring 10 within the annular grooves of the lugs 8, thereby preventing the handle 9 from falling out.

[0053] In this embodiment, the lid 6, handle 9, lifting ear 8, retaining ring 10, barrel upper cover 4, outer barrel 3, barrel bottom plate 2, source frame 102, and source cover 101 are made of stainless steel, which has certain strength and good corrosion resistance. The shielding layer and shielding column are made of lead, tungsten steel, or depleted uranium with a high atomic number.

[0054] During use, place the radioactive source 103 into the source cover 101, then place the shielding column 104, and then tighten the source frame 102 and the source cover 101 to form the radioactive source housing 1; insert the radioactive source housing 1 into the center hole of the radioactive source container, align the threaded hole of the source frame plate 1021 of the radioactive source housing 1 with the threaded hole of the barrel upper cover 4, and tighten with screws to prevent movement; then insert the silicone pad 7 into the threaded root of the cover 6, tighten the cover 6 and the barrel upper cover 4, and the installation is complete.

[0055] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A radioactive source housing, characterized in that: include: A source cover and a source frame mounted together with the source cover, wherein the source cover and the source frame form an inner cavity; A radiation source and a shielding column are placed in the inner cavity, and the shielding column is located above the radiation source.

2. The radiation source housing according to claim 1, wherein: The bottom of the source rack is provided with an external thread, the upper part of the source cover is provided with an internal thread matching the external thread of the bottom of the source rack, and a blind hole is provided inside the source cover to form the inner cavity.

3. The radiation source housing according to claim 2, wherein: The blind hole diameter of the source cover is consistent with that of the radiation source and the shielding column.

4. The radiation source housing according to claim 1, wherein: The length of the source frame is shorter than the length of the source cover.

5. A radioactive source container, characterized in that: It comprises the radiation source housing according to any one of claims 1 to 4, and further comprises: a barrel body consisting of a barrel bottom plate, an outer barrel body and a barrel body upper cover; the barrel body is wrapped with a shielding layer, and the radiation source housing is placed in the shielding layer inside the barrel body; the upper part of the barrel body upper cover is also covered with a lid.

6. The radioactive source container according to claim 5, characterized in that: The top of the source rack is set as a source rack plate, and the central part of the barrel cover is provided with a groove and a through hole. The size of the groove is consistent with the diameter of the source rack plate, which is used to prevent the radiation source shell from shaking; the through hole is consistent with the diameter of the middle position of the source rack of the radiation source shell, and the radiation source shell is placed in the barrel body through the through hole.

7. The radioactive source container according to claim 6, characterized in that: The source rack is provided with a threaded hole, and the groove of the barrel cover is correspondingly provided with a threaded hole, and the source rack and the barrel cover are fixed by tightening screws.

8. The radioactive source container according to claim 5, characterized in that: The outer ring of the barrel body upper cover is an external thread, the lower part of the cover is provided with an internal thread matching the external thread, and a silicone pad is provided between the barrel body upper cover and the cover.

9. The radioactive source container according to claim 5, characterized in that: It also includes lifting ears, a handle and a retaining ring. Lifting ears are provided on both sides of the outer barrel body. One side of the lifting ear has an annular groove. A circular through hole is provided at the lower part of the handle. The circular through hole of the handle is passed through the lifting ears on both sides, and the retaining ring is clamped in the annular groove of the lifting ear.

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