Waste cobalt source rod treatment container
By designing a cobalt source rod treatment container including protective barrels and shield barrels, using bone-shaped connectors, buffer pads and rubber rings, the problem of insufficient mechanical and corrosion resistance of existing containers is solved, and efficient cobalt source rod treatment and reduced treatment costs are achieved.
Patent Information
- Application Number
- CN202420270786.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-04
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-02-04
AI Technical Summary
The existing cobalt source rod treatment containers have insufficient mechanical properties and corrosion resistance, which can easily lead to leakage and damage. The container after cement curing is large in volume and weight, which is inconvenient for transportation and storage.
A treatment container including a protective barrel and a shielding barrel is designed. The outer side wall of the protective barrel is equipped with a bone-shaped connector. The inner bottom wall and side wall of the shielding barrel are equipped with buffer pads and rubber rings. The shielding cover is equipped with a spring and a tapered plug, and a limit cover and air outlet for gas emission.
It realizes a cobalt source rod treatment container with simple structure and high protection performance, which can effectively prevent leakage and damage, is suitable for deep underground treatment, and reduces treatment costs.
Smart Images
Figure CN222636867U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of nuclear waste treatment, in particular to a waste cobalt source rod treatment container. Background Art
[0002] In the irradiation industry, cobalt source rods made of cobalt 60 are needed to irradiate products. Cobalt source rods have a service life. Generally, the cobalt element in the cobalt source rods is recovered by dry or wet chemical treatment. However, cobalt source rods that cannot be recycled generally need to be placed in special radioactive waste treatment equipment for safe disposal. They are usually placed in sealed containers and buried deep underground.
[0003] At present, the market generally uses barrels made of lead alloy steel to seal the cobalt source rods and then bury them deep underground or solidify them with cement. When using lead alloy steel barrels, the mechanical properties and corrosion resistance of lead alloy steel are poor. First, it is easy to be corroded and cause leakage. Second, it is easy to be squeezed by rocks moving with the movement of the earth's crust and then damaged and cause leakage. Using cement solidification will increase the volume and weight, which is not convenient for subsequent transportation and storage. In addition, the cobalt source rods are prone to chemical reaction in cement again, which will cause the cement block to crack and cause leakage. Utility Model Content
[0004] The utility model aims to provide a waste cobalt source rod processing container with simple structure and high protection performance.
[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a waste cobalt source rod processing container, including: a protective barrel and a shielding barrel, a plurality of bone-shaped connectors are evenly distributed on the circumference of the outer wall of the protective barrel, the shielding barrel extends into the protective barrel and is sealed and connected to the protective barrel, a buffer rubber pad is arranged on the inner bottom wall of the shielding barrel, a plurality of buffer rubber rings are arranged on the inner wall of the shielding barrel from top to bottom, a shielding cover is threadedly connected to the shielding barrel, a first spring is arranged on the bottom wall of the shielding cover, a sheath is connected to the first spring, a plurality of columnar cone holes are arranged on the shielding cover, a conical plug is movably sealed in the columnar cone hole, a limiting cover is threadedly connected in the columnar cone hole, a second spring is arranged between the limiting cover and the conical plug, and a plurality of air outlets are arranged on the limiting cover.
[0006] Furthermore, in the aforementioned waste cobalt source rod processing container, the bone-shaped connector includes: a cross steel plate and a circular plate, one end of the cross steel plate is welded to the protective barrel, and a circular plate is welded to the other end of the cross steel plate, a plurality of through holes are evenly distributed on the circumference of the circular plate, and arc grooves are provided on the four flanges of the cross steel plate.
[0007] Furthermore, in the aforementioned waste cobalt source rod processing container, the connection structure between the shielding barrel and the protective barrel is as follows: a connecting ring is welded on the outer wall of the shielding barrel, a plurality of connecting holes are evenly distributed on the connecting ring, a clamping ring is extended downward on the connecting ring, an annular groove and a plurality of threaded holes are evenly distributed on the upper end wall of the protective barrel, a spacer is arranged in the annular groove, the number of threaded holes is the same as the number of connecting holes, the clamping ring on the connecting ring is inserted into the annular groove and abuts against the spacer, the connecting holes are aligned one by one with the threaded holes, the bolts pass through the connecting holes and are threadedly connected with the aligned threaded holes, and sealant is applied between the connecting ring and the protective barrel.
[0008] Furthermore, in the aforementioned waste cobalt source rod processing container, a buffer layer is pasted on the inner wall of the protective barrel.
[0009] Furthermore, in the aforementioned waste cobalt source rod processing container, the conical plug is made of PTFE material, and a weight-reducing groove is opened at the bottom of the conical plug.
[0010] Furthermore, in the aforementioned waste cobalt source rod processing container, the connection structure between the buffer rubber ring and the shielding barrel is as follows: an annular clamping ring is welded on the inner wall of the protective barrel, an annular groove is opened on the inner wall of the annular clamping ring, and the buffer rubber ring is clamped in the annular groove and protrudes from the annular clamping ring.
[0011] Furthermore, in the aforementioned waste cobalt source rod processing container, the shielding barrel, shielding cover and limiting cover are all made of lead alloy, and the protective barrel is made of low alloy steel.
[0012] Furthermore, in the aforementioned waste cobalt source rod processing container, the buffer rubber ring and the buffer rubber pad are both made of PTFE material.
[0013] Furthermore, in the aforementioned waste cobalt source rod processing container, a hexagonal hole is provided on the top wall of the shielding cover, a hexagonal protrusion is provided on the limiting cover, and the air outlet hole passes through the bottom wall and the side wall of the limiting cover.
[0014] The utility model has the advantages that a corresponding number of processing containers can be combined according to the number of discarded cobalt source rods, and then the processing containers of this batch can be buried deep underground together, so that a plurality of discarded cobalt source rods can be processed at one time, thereby reducing the processing cost; after the combined processing containers are buried deep underground, when encountering strong crustal movement, they can effectively protect the protection barrel and the shielding barrel, and prevent the protection barrel and the shielding barrel from being damaged and causing nuclear leakage; when the gas pressure generated by the radiation of the cobalt source rods in the shielding barrel is too large, the gas pressure in the shielding barrel will push the conical plug and be discharged from the air outlet into the soil layer, thereby preventing the shielding barrel from being burst. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1It is a schematic diagram of the top view of the structure of the waste cobalt source rod processing container described in the utility model.
[0016] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure.
[0017] Figure 3 It is a schematic diagram of the structure in which multiple waste cobalt source rod processing containers are combined together. DETAILED DESCRIPTION
[0018] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and preferred embodiments.
[0019] like Figure 1 to Figure 3As shown, the waste cobalt source rod processing container described in the utility model includes: a protection barrel 1 made of low-alloy steel and a shielding barrel 2 made of lead alloy steel. Low-alloy steel generally refers to alloy steel with a total amount of alloy elements less than 5%, and lead alloy steel generally refers to alloy steel with lead as the base material and other elements added. Both low-alloy steel and lead alloy steel are existing technologies and are not described in detail here. Low-alloy steel has good mechanical properties and corrosion resistance, and can ensure a sufficiently long service life when it is buried deep underground. The lead in the lead alloy steel has high density and high atomic number, which can effectively block gamma rays and play a blocking role. A buffer layer 11 is pasted on the inner wall of the protection barrel 1, and a plurality of bone-shaped connectors 3 are evenly distributed on the circumference of the outer wall of the protection barrel 1. The bone-shaped connector 3 includes Including: a cross steel plate 31 and a circular plate 32, one end of the cross steel plate 31 is welded to the protective barrel 1, and a circular plate 32 is welded to the other end of the cross steel plate 31, and a plurality of through holes 321 are evenly distributed on the circumference of the circular plate 32, and arc grooves 311 are arranged on the four flanges of the cross steel plate 31, and the arc grooves 311 on the four flanges of the cross steel plate 31 will weaken the bearing capacity of the cross steel plate 31, when subjected to a certain degree of load or after a certain period of time, the portion of the cross steel plate 31 weakened by the arc grooves 311 will undergo plastic deformation and change from the original rigid connection to a flexible connection, the shielding barrel 2 extends into the protective barrel 1 and is connected to the protective barrel 1, and the connection structure between the shielding barrel 2 and the protective barrel 1 is: a connecting ring is welded on the outer wall of the shielding barrel 2 21, a plurality of connecting holes are evenly distributed on the circumference of the connecting ring 21, a clamping ring 211 is extended downwardly from the connecting ring 21, an annular groove 12 and a plurality of threaded holes are evenly distributed on the circumference are provided on the upper end wall of the protective barrel 1, the number of threaded holes is the same as the number of connecting holes, a spacer 13 is provided in the annular groove 12, the connecting ring 21 on the shielding barrel 2 abuts against the upper end wall of the protective barrel 1, the clamping ring 211 on the connecting ring 21 is inserted into the annular groove 12 and abuts against the spacer 13, the connecting holes are aligned with the threaded holes one by one, the bolts 14 pass through the connecting holes and are threadedly connected with the aligned threaded holes, and then a sealant is applied between the connecting ring 21 and the protective barrel 1 to improve the sealing effect, and a buffer rubber pad 22 made of PTFE material is provided on the inner bottom wall of the shielding barrel 2, A plurality of buffer rubber rings 23 made of PTFE material are arranged at intervals from top to bottom on the inner wall of the shielding barrel 2. The PTFE material will not be affected by cobalt radiation and maintains its original performance. The connection structure between the buffer rubber ring 23 and the shielding barrel 2 is as follows: an annular clamping ring 24 is welded on the inner wall of the shielding barrel 2, and an annular groove is opened on the inner wall of the annular clamping ring 24. The buffer rubber ring 23 is clamped in the annular groove and protrudes from the annular clamping ring 24. A shielding cover 4 made of lead alloy steel is threadedly connected to the shielding barrel 2, a first spring 41 is arranged on the bottom wall of the shielding cover 4, a sheath 411 is connected to the first spring 41, and an inner hexagon hole 42 is arranged on the top wall of the shielding cover 4. The shielding cover 4 can be tightened on the shielding barrel 2 with an inner hexagon wrench.A plurality of cylindrical cone holes 43 are evenly distributed on the shielding cover 4, and a conical plug 44 made of PTFE material is movably sealed in the cylindrical cone hole 43. A weight-reducing groove 441 is provided at the bottom of the conical plug 44. A limit cover 5 made of lead alloy steel is threadedly connected in the cylindrical cone hole 43. A hexagonal protrusion is provided on the limit cover 5. The limit cover 5 can be screwed into the cylindrical cone hole 43 with a wrench. A second spring 51 is provided between the limit cover 5 and the conical plug 44. A plurality of air outlet holes 52 penetrating the bottom wall and the side wall of the limit cover 5 are evenly distributed on the limit cover 5.
[0020] According to the number of scrapped cobalt source rods, multiple processing containers are connected, and the connection method is as follows: the circular plates 32 on the two processing containers are placed against each other, and a buffer pad 6 is set between the two circular plates 32, and then bolts are passed through the through holes 321 between the two circular plates 32 for connection, and then the scrapped cobalt source rods are loaded into the shielding barrel 2, and then the shielding cover 4 is screwed on the shielding barrel 2, the sheath 411 is put on the cobalt source rod and the elastic force of the first spring 41 is used to limit the cobalt source rod, and then the connected processing containers containing the scrapped cobalt source rods are buried deep underground. When the processing container is buried deep underground, since the outlet end of the air outlet hole 52 is horizontally placed on the side wall, it is not easily blocked by soil. During long-term storage, the internal environment of the shielding barrel 2 is prone to produce gas due to the radiation of the cobalt source rod. When the air pressure in the shielding barrel 2 is relatively high, the conical plug 44 will be pushed to overcome the elastic force of the second spring 51 and move upward in the column cone hole 43, so that an exhaust gap is formed between the conical plug 44 and the column cone hole 43. The gas in the shielding barrel 2 can be discharged into the soil layer through the exhaust gap and the air outlet hole 52 to prevent the shielding barrel 2 from being burst due to excessive gas in the shielding barrel 2. When the processing container encounters stronger crustal movement, the bone-shaped connector 3 between the connected processing containers will preferentially undergo flexible movement or even break, to prevent the protective barrel 1 from being torn due to the rigid connection between the two connected processing containers. When a single processing container moves with the crust, the protective barrel 1 protects the shielding barrel 2. When the protective barrel 1 is subjected to the squeezing force of the rock, the buffer layer 11 on the protective barrel 1 plays a buffering role, to prevent the protective barrel 1 from strongly colliding with the shielding barrel 2 and causing damage to the protective barrel 1 or the shielding barrel 2. The cobalt source rod will be protected by the sheath 411 in the shielding barrel 2 and will not shake. If the processing container shakes too much and causes the cobalt source rod to break away from the restriction of the sheath 411, the buffer rubber ring 23 in the shielding barrel 2 will protect the cobalt source rod and prevent the cobalt source rod from directly colliding with the shielding barrel 2.
[0021] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or replaced by equivalents, and any modification or equivalent replacement that does not depart from the spirit and scope of the utility model should be included in the scope of protection of the claims of the utility model.
Claims
1. A waste cobalt source rod processing container, characterized by: include: A protective barrel and a shielding barrel, with a plurality of bone-shaped connectors evenly distributed on the circumference of the outer wall of the protective barrel, the shielding barrel extending into the protective barrel and sealedly connected to the protective barrel, a buffer rubber pad is arranged on the inner bottom wall of the shielding barrel, and a plurality of buffer rubber rings are arranged on the inner wall of the shielding barrel from top to bottom at intervals, a shielding cover is threadedly connected to the shielding barrel, a first spring is arranged on the bottom wall of the shielding cover, a sheath is connected to the first spring, a plurality of columnar cone holes are arranged on the shielding cover, a conical plug is movably sealed in the columnar cone hole, a limiting cover is threadedly connected in the columnar cone hole, a second spring is arranged between the limiting cover and the conical plug, and a plurality of air outlets are arranged on the limiting cover.
2. The waste cobalt source rod processing container according to claim 1, characterized in that: The bone-shaped connector includes: a cross steel plate and a circular plate. One end of the cross steel plate is welded to the protective barrel, and the other end of the cross steel plate is welded to the circular plate. A plurality of through holes are evenly distributed on the circumference of the circular plate, and arc grooves are arranged on the four flanges of the cross steel plate.
3. The waste cobalt source rod processing container according to claim 1, characterized in that: The connection structure between the shielding barrel and the protective barrel is as follows: a connecting ring is welded on the outer wall of the shielding barrel, a plurality of connecting holes are evenly distributed on the connecting ring around the circumference, a clamping ring is extended downward on the connecting ring, an annular groove and a plurality of threaded holes are evenly distributed on the circumference are provided on the upper end wall of the protective barrel, a spacer is provided in the annular groove, the number of threaded holes is the same as the number of connecting holes, the clamping ring on the connecting ring is inserted into the annular groove and rests on the spacer, the connecting holes are aligned one by one with the threaded holes, the bolts pass through the connecting holes and are threadedly connected with the aligned threaded holes, and sealant is applied between the connecting ring and the protective barrel.
4. The waste cobalt source rod processing container according to claim 1, characterized in that: A buffer layer is pasted on the inner wall of the protection barrel.
5. The waste cobalt source rod processing container according to claim 1, characterized in that: The conical plug is made of PTFE material, and a weight-reducing groove is provided at the bottom of the conical plug.
6. The waste cobalt source rod processing container according to claim 1, characterized in that: The connection structure between the buffer rubber ring and the shielding barrel is as follows: an annular clamping ring is welded on the inner wall of the protection barrel, an annular groove is opened on the inner wall of the annular clamping ring, and the buffer rubber ring is clamped in the annular groove and protrudes from the annular clamping ring.
7. The waste cobalt source rod processing container according to claim 1, characterized in that: The shielding barrel, shielding cover and limiting cover are all made of lead alloy, and the protection barrel is made of low alloy steel.
8. The waste cobalt source rod processing container according to claim 1, characterized in that: The buffer rubber ring and the buffer rubber pad are both made of PTFE material.
9. The waste cobalt source rod processing container according to claim 1, characterized in that: A hexagonal hole is arranged on the top wall of the shielding cover, a hexagonal protrusion is arranged on the limiting cover, and an air outlet hole penetrates the bottom wall and the side wall of the limiting cover.