CN206163133U - Radiation source cask - Google Patents
Radiation source cask Download PDFInfo
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- CN206163133U CN206163133U CN201621210210.4U CN201621210210U CN206163133U CN 206163133 U CN206163133 U CN 206163133U CN 201621210210 U CN201621210210 U CN 201621210210U CN 206163133 U CN206163133 U CN 206163133U
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- ray
- shutter
- radioactive source
- ray shutter
- shield
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Abstract
The utility model discloses a radiation source cask, include: the shield, it is used for placing the radiation source, ray shutter subassembly, it includes first ray shutter and second ray shutter, first ray shutter and second ray shutter are all located in the shield, actuating mechanism, its with ray shutter subassembly is connected and is used for the drive first ray shutter and second ray shutter rotate, so that the ray warp first ray shutter and second ray shutter jet out or prohibit that the ray jets out, and ray collimator, it is located be used for on the shield following the ray that ray shutter subassembly jetted out retrains. Adopt the utility model discloses a radiation source cask, on the basis that possesses better shielding radiation effect, the light in weight of ray shutter subassembly, inertia is little, and is with low costs.
Description
Technical field
The utility model be related to the fields such as industry, traffic application radioactive source safety device, more particularly to one
Plant radioactive source cask flask.
Background technology
In highway green channel vehicle radiating perspective imaging inspection system, using the radioactive source of cobalt -60 as radiographic source,
The radioactive source of II class cobalt -60 was once adopted, the service area that inspection system is arranged on highway is interior or charge station's exit/entry wide
On field.The problem of presence is：Driver is unwilling that into service area or square fearness delays their time, and driver is ready with normal
Road speed is checked in the process by charge station.In order to improve the inspection efficiency of green channel vehicle, user requires
Inspection system is arranged on the safety island of charge station.But, safety island is a wide-open place, truck driver, receipts
Fei Yuan, security personnel and other publics may pass through at any time from inspection system side, or even stop for a moment.Therefore, such as
Fruit is arranged on inspection system on the safety island of charge station, and the dose level of radiation around inspection system is reduced as far as possible, subtracts as far as possible
Few radiation is potentially hazardous to environment and personnel, becomes the problem for having to solve of designer.
The approach for solving the above problems has two：One is using the radioactive source of cobalt -60 of alap radioactive activity；Two
It is the cask flask for manufacturing shield effectiveness radioactive source as well as possible.Through testing repeatedly, it was demonstrated that the radioactive source of IV class cobalt -60 can
Meet the needs of green channel vehicle inspection, the producer for producing inspection system successively all employs the radioactive source of IV class cobalt -60.In order to
Further reduce the dose level of radiation of inspection system surrounding environment, it is necessary to which research and design, manufacture shield effectiveness are preferably radiated
The cask flask in source.In order to reach preferable shield effectiveness in prior art, it is allowed to which ray is projected or forbids what ray projected to penetrate
The weight weight of line shutter, inertia is big, high cost.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of radioactive source cask flask, is possessing preferably shielding
On the basis of radiation effect, ray shutter assembly it is lightweight, inertia is little, low cost.
In order to solve above-mentioned technical problem, the utility model provides a kind of radioactive source cask flask, including：Shield,
It is used to place radioactive source；Ray shutter assembly, it includes the first ray shutter and the second ray shutter, and first ray is fast
Door and the second ray shutter are internal located at the shielding；Drive mechanism, it is connected to drive with the ray shutter assembly
The first ray shutter and the second ray shutter are rotated, so that the first ray shutter described in ray Jing and the second ray shutter are penetrated
Go out or forbid ray to project；And ray collimator, it is located on the shield is used for penetrating from the ray shutter assembly
The ray for going out enters row constraint.
Preferably, the shield includes the Part I of hemisphere shape and the Part II of cylindrical shape, it is described
The planar side of Part I fits with the end face of one end of the Part II；The radioactive source is arranged on the Part I
It is interior；The ray shutter assembly is arranged in the Part II.
Preferably, the conduit of the centre of sphere through the Part I is provided with the Part I, the radioactive source
It is arranged in the conduit and at the centre of sphere of the Part I.
Preferably, the first ray shutter and the second ray shutter are cylindrical shape, the first ray shutter
Vertical with the axis of the Part II of the shield with the axis of the second ray shutter and along ray injection direction sets side by side
Put.
Preferably, the two ends of the first ray shutter and the second ray shutter are respectively provided with rotating shaft, described first penetrates
The two ends of line shutter and the second ray shutter are rotated with the Part II by rotating shaft be connected respectively；The drive mechanism includes
Actuator, tooth bar and two gears, it is solid respectively in the rotating shaft positioned at homonymy of the first ray shutter and the second ray shutter
Surely the gear is equipped with, the tooth bar is engaged with two gears simultaneously, and the actuator is connected to the tooth bar
The tooth bar is driven to move back and forth.
Preferably, the actuator is electromagnetic driver, electro-hydraulic pusher, electric pushrod or the electronic execution of rectilinear path
Device.
Preferably, the first ray shutter and the second ray shutter are made by tungsten alloy material；The shield
Made using lead.
Preferably, the width that the slit of ray injection is allowed on the first ray shutter and the second ray shutter is
4mm～8mm；On the ray collimator allow ray project slit width be 4mm～8mm, length be 400mm～
800mm, so that ray is constrained to into horizontal subtended angle as 0.1 °～0.2 °, the fan-shaped narrow beam that 60 °～80 ° of vertical subtended angle.
Preferably, the radioactive source is cobalt -60, caesium -137, Iridium-192 source, radium-226, barium -133, the radioactive source is put
Penetrating property activity is：2.96х108Becquerel～1.11 х 1013Becquerel.
Preferably, the radioactive source cask flask also includes shutter, base and outer cover, the shutter
Includes two travel switches triggered by the tooth bar and the indicator lamp being connected with the travel switch；
The shield, the drive mechanism and shutter are fixedly installed on the base, described outer
It is located at outside the base, the shield, the drive mechanism and shutter.
Compared with prior art, the beneficial effect of radioactive source cask flask of the present utility model is：
1. ray shutter assembly adopts two ray shutters and two ray shutters realize the structure of synchronous rotary for generation
Boundary initiates, on the premise of shield effectiveness is ensured, with shutter it is lightweight, inertia is little, rotation with stop flexible advantage, and institute
The driving force of needs is less, safe and reliable；
2. shield effectiveness is good, and radioactive source cask flask of the present utility model is mainly using tungsten alloy and the shielding material of lead material
Material, and using rational, novel structure design so as to shield effectiveness is excellent, and screening factor reaches 5 × 105, it is being put into
(its radioactive activity is 2.96 × 10 to the radioactive source of cobalt -6010Becquerel) when, spoke is leaked at outer cover (also known as source case) surface 5cm
Close rate≤0.35 μ Sv/h are penetrated, at shroud surface 100cm, leakage radiation dose rate≤0.16 μ Sv/h, Jie Jin natural
Bottom level, to environment and the potential radiation hazradial bundle of personnel floor level is reduced to；
3. actuator is realized and drive over long distances (50mm-60mm rows using electromagnetic driver or electro hydraulicthruster
Journey), dynamic control is carried out to pusher using electronic auto-control technology, service life is substantially prolongs, and save electric energy.
Description of the drawings
Fig. 1 is the structural representation of radioactive source cask flask of the present utility model.
Description of reference numerals：1- Part I；2- Part II；3- radioactive sources；4- conduits；5- plugs；The rays of 6- first
Shutter；7- the second ray shutters；8- rotating shafts；9- gears；10- tooth bars；11- rack supports；12- ray collimators；13- bases.
Specific embodiment
Below in conjunction with the accompanying drawings radioactive source cask flask of the present utility model is described in further detail with specific embodiment,
But not as to restriction of the present utility model.
As shown in figure 1, the utility model embodiment discloses a kind of radioactive source cask flask, it includes：Shield, its use
In placement radioactive source 3；Ray shutter assembly, it includes the first ray shutter 6 and the second ray shutter 7, the He of the first ray shutter 6
Second ray shutter 7 is in shield；Drive mechanism, it is connected to drive the first ray shutter with ray shutter assembly
6 and second ray shutter 7 rotate so that the first rays of ray Jing shutter 6 and the second ray shutter 7 are projected or forbid ray to penetrate
Go out；And ray collimator 12, it is located on shield the ray being used for projecting from ray shutter assembly and enters row constraint.This reality
It is that two ray shutters are relative to of the prior art with advantage of the new radioactive source cask flask using two ray shutters
For one ray shutter, its overall weight is light, and rotary inertia is little, promotes the motive force of ray shutter little, the machinery damage for causing
Wound is little.
In the present embodiment, shield includes the Part I 1 of hemisphere shape and the Part II 2 of cylindrical shape, the
The planar side of a part 1 fits with the end face of one end of Part II 2.Part I 1 can be integrated into Part II 2
Type structure, or Split type structure.Wherein, the radius of Part I 1 and the radius of Part II 2 can be with identical, first
It is provided with outside point 1 outside the shell of the thick Q235 steel of 5mm, Part II 2 and is also equipped with the shell of the thick Q235 steel of 5mm, and the
The shell of a part 1 and the shell of Part II 2 are alignd and are combined together by way of sealing welding.Radioactive source 3 is arranged
In Part I 1；Ray shutter assembly is arranged in Part II 2.
In the present embodiment, the conduit 4 of the interior vertical placement for being provided with the centre of sphere through Part I 1 of Part I 1, puts
Penetrate source 3 to be arranged in conduit 4 and at the centre of sphere of Part I 1.The top of conduit 4 is provided with plug 5, plug 5 with lead
Pipe 4 is using threaded connection.Radioactive source 3 can be put into or be taken out by conduit 4, and after radioactive source 3 are put into, radioactive source is located at first
At the centre of sphere of part 1, after plug 5 is threaded togather with conduit 4, and plug 5 is locked on conduit 4 using tapered end, is prevented
Radioactive source 3 is illegally taken out.
In the present embodiment, the first ray shutter 6 and the second ray shutter 7 are cylindrical shape, the He of the first ray shutter 6
The axis of the second ray shutter 7 is vertical with the axis of the Part II 2 of shield and injection direction of along ray is arranged side by side.The
Slit is offered on one ray shutter 6 and the second ray shutter 7, when narrow on the first ray shutter 6 and the second ray shutter 7
When seam rotates to alignment, the gamma-rays of radioactive source 3 can be projected by slit.In prior art, columned penetrated using one
Line shutter, to reach preferable shield effectiveness, it is larger that the cylinder typically can do, for example its a diameter of 154mm, and axial length is
400mm, gross weight is 138kg.Using radioactive source cask flask of the present utility model, identical shield effectiveness is reached, two
The gross weight of cylindrical ray shutter only has 62kg, and than the gross weight of the single cylindrical ray shutter of prior art one is mitigated
Half.Ray shutter assembly in the utility model due to weight saving half, so as to the cost for manufacturing ray shutter assembly also drops
It is low for original half.
In the present embodiment, the two ends of the first ray shutter 6 and the second ray shutter 7 are respectively provided with rotating shaft 8, the first ray
The two ends of the ray shutter 7 of shutter 6 and second are rotated with Part II 2 by rotating shaft 8 be connected respectively.Drive mechanism includes activating
Device, tooth bar 10 and two gears 9, fix respectively in the rotating shaft 8 positioned at homonymy of the first ray shutter 6 and the second ray shutter 7
Gear 9 is equipped with, tooth bar 10 is engaged with two gears 9 simultaneously, actuator is connected to drive tooth bar 10 back and forth to transport with tooth bar 10
It is dynamic.Tooth bar 10 is arranged on rack support 11, when tooth bar 10 does the reciprocating action advanced or retreat, two engaged with tooth bar 10
Individual gear 9 rotates round about simultaneously.For example, the stop motion as 10 advance 50mm of tooth bar, now, first be could be arranged to
The ray shutter 7 of ray shutter 6 and second is rotated by 90 ° round about simultaneously, the first ray shutter 6 and the second ray shutter 7
Slit aligns and connects, and the slit of ray collimator 12 is now in same plane, radioactive source 3 with the slit of ray shutter assembly
Slit of the gamma-rays by the slit of ray shutter assembly and through ray collimator 12 project；Then, rack retreats are worked as
Stop motion during 50mm, now, the first ray shutter 6 and the second ray shutter 7 are rotated by 90 ° round about simultaneously, and first penetrates
The slit of the ray shutter 7 of line shutter 6 and second is vertical with gamma-ray injection direction, and gamma-rays is blocked, it is impossible to project.
In the present embodiment, actuator can be for electromagnetic driver, electro-hydraulic pusher, electric pushrod or rectilinear path is electronic holds
Row device.For example, it may be Long travel electromagnetic driver or Long travel electro hydraulicthruster.Result on trial finds：The former is excellent
Point is that switch ray shutter assembly is rapid, and ray shutter assembly about can be fully opened at≤0.2 second, and its operating voltage is
220VAC, identical with the voltage of general toll station (most charge stations do not have 380VAC power supplys or away from 380VAC distribution
Cabinet is far)；The former shortcoming is to clash into, shake relatively by force, and part machinery damages larger；The advantage of the latter is switch ray shutter group
Part speed is moderate, and ray shutter assembly was about fully opened in≤0.5 second, shakes less；The shortcoming of the latter is its operating voltage
380VAC is different from the voltage 220VAC of general toll station.
In the present embodiment, the first ray shutter 6 and the second ray shutter 7 are made by tungsten alloy material, and shield is adopted
Lead is made, and ray collimator 12 is adopted and is made of a steel.The density of lead is 11.34g/cm3, the density of tungsten alloy is 18.5g/cm3, it is thick
It is 2 × 10 to spend the gamma-ray attenuation multiple sent to the radioactive source of cobalt -60 3 for the tungsten of 136mm5, and the lead of same size to cobalt-
The gamma-ray attenuation multiple that 60 radioactive sources 3 send is 2 × 103, tungsten is bigger than the damping capacity of lead 100 times.In radioactive source shielding
Shield effectiveness is substantially increased using tungsten alloy material in the key position and ray shutter assembly of container, screening factor can reach
5×105.The shield effectiveness of this radioactive source cask flask is splendid, and security performance is good, can apply to highway green logical
In road vehicle inspection system.According to 25 sets of products that radioactive source cask flask of the present utility model is produced, can reach makes the public
Irradiation year effective dose≤0.1mSv, than the Public Exposure year effective dose limit value of standard GB/T 18871-2002 regulations
(1mSv) it is little 10 times.
In the present embodiment, the width that the slit of ray injection is allowed on the first ray shutter 6 and the second ray shutter 7 is
4mm～8mm；The width that the slit of ray injection is allowed on ray collimator 12 is 4mm～8mm, length is 400mm～800mm,
So that ray is constrained to into horizontal subtended angle as 0.1 °～0.2 °, vertical subtended angle is 60 °～80 ° of fan-shaped narrow beam.Wherein, the width of slit
Degree is referred to, in the radioactive source cask flask shown in Fig. 1, on the direction of paper, and the distance that slit is opened up.Slit
Length refer to, in the radioactive source cask flask shown in Fig. 1, along the axial direction of the cylinder of Part II 2, slit institute
The distance for opening up.For example, the width of the slit of the first ray shutter 6 and the second ray shutter 7 is 6mm, when slit and gamma-rays
Injection direction it is vertical when, the shielding thickness for stopping the ray shutter assembly of gamma-ray tungsten alloy is the first ray shutter 6
With the width that the diameter sum of the second ray shutter 7 deducts two slits.Such as, the first ray shutter 6 and second of cylinder is penetrated
A diameter of 80mm of line shutter 7, now, shielding thickness is 80 × 2-6 × 2=148mm, tables look-up and understands, 148mm thick tungsten is closed
The gamma-ray attenuation multiple that golden screen layer is launched the radioactive source of cobalt -60 3 is 5 × 105。
In the present embodiment, radioactive source 3 can be cobalt -60, caesium -137, Iridium-192 source, radium-226, barium -133, radioactive source 3
Radioactive activity is：2.96х108Becquerel～1.11 х 1013Becquerel.
In the present embodiment, radioactive source cask flask also includes being turned on and off shape for indicating that ray shutter assembly is in
Shutter of state.The order that operating personnel are opened or closed by main control computer input, drives drive mechanism action,
And then tooth bar 10 advances or retreats.Shutter by two proximity travel switches triggered by tooth bar 11 and with
The indicator lamp composition of travel switch connection, when "ON" position of the indicating bar on tooth bar 10 close to travel switch, master control meter
Red led on the screen of calculation machine is glittering, and the glittering warning people of the red led above radioactive source cask flask are not
It is close.When needing to close ray shutter assembly, the power supply of main control computer control cut-out actuator, actuator is built-in multiple
Retract push rod in the presence of the spring of position, ray shutter assembly is automatically switched off in the presence of external back-moving spring.When on tooth bar 10
Indicating bar proximity overtravel-limit switch off-position when, the green indicating lamp on the screen of main control computer is glittering, and radiates
Red led above the cask flask of source is knocked out, and points out people's ray shutter assembly to close, is projected without ray.
In the present embodiment, radioactive source cask flask also includes base 13 and outer cover, shield, drive mechanism, fast door state
Display device and rack support 11 are fixedly installed on base 13, and by pre-embedded anchoring bolts and reinforced concrete
Plinth connects.By the angle for adjusting base 13 and reinforced concrete foundation horizontal plane, the slit of ray collimator 12 can be adjusted
The angle that raises up.Outer cover is located at outside base 13, shield, drive mechanism and shutter, and outer cover is by square
Steel pipe and 2mm thick steel plate welds to be formed, and outer cover lower frame is fixed on reinforced concrete foundation by pre-embedded anchoring bolts.If
Outer cover is put, safety interlocking and acoustooptic alarm system can be provided with windproof, rain-proof, dust-proof and antitheft on outer cover door, prevented
Unwarranted personnel contact without authorization radioactive source 3, are the physical protection casings of radioactive source 3.
Above example is only exemplary embodiment of the present utility model, is not used in restriction the utility model, and this practicality is new
The protection domain of type is defined by the claims.Those skilled in the art can be in essence of the present utility model and protection domain
It is interior, various modifications or equivalent are made to the utility model, this modification or equivalent also should be regarded as new in this practicality
In the protection domain of type.
Claims (10)
1. a kind of radioactive source cask flask, it is characterised in that include：
Shield, it is used to place radioactive source；
Ray shutter assembly, it includes the first ray shutter and the second ray shutter, the first ray shutter and the second ray
Shutter is internal located at the shielding；
Drive mechanism, it is connected to drive the first ray shutter and the second ray shutter to turn with the ray shutter assembly
It is dynamic, so that the first ray shutter described in ray Jing and the second ray shutter are projected or forbid ray to project；And
Ray collimator, it is located on the shield ray being used for projecting from the ray shutter assembly and enters row constraint.
2. radioactive source cask flask according to claim 1, it is characterised in that the shield includes the of hemisphere shape
The Part II of a part and cylindrical shape, the end face phase of the planar side of the Part I and one end of the Part II
Laminating；The radioactive source is arranged in the Part I；The ray shutter assembly is arranged in the Part II.
3. radioactive source cask flask according to claim 2, it is characterised in that be provided with the Part I through institute
The conduit of the centre of sphere of Part I is stated, the radioactive source is arranged in the conduit and positioned at the centre of sphere of the Part I
Place.
4. radioactive source cask flask according to claim 2, it is characterised in that the first ray shutter and the second ray
Shutter is the axis and the Part II of the shield of cylindrical shape, the first ray shutter and the second ray shutter
Axis is vertical and is arranged side by side along the injection direction of ray.
5. radioactive source cask flask according to claim 4, it is characterised in that the first ray shutter and the second ray
The two ends of shutter be respectively provided with the two ends of rotating shaft, the first ray shutter and the second ray shutter respectively by rotating shaft with it is described
Part II rotates connection；The drive mechanism includes actuator, tooth bar and two gears, the first ray shutter and second
Respectively fixing assembling has the gear in the rotating shaft positioned at homonymy of ray shutter, and the tooth bar is nibbled with two gears simultaneously
Close, the actuator is connected to drive the tooth bar to move back and forth with the tooth bar.
6. radioactive source cask flask according to claim 5, it is characterised in that the actuator is electromagnetic driver, electricity
Liquid pusher, electric pushrod or rectilinear path YE.
7. radioactive source cask flask according to claim 1, it is characterised in that the first ray shutter and the second ray
Shutter is made by tungsten alloy material；The shield is made using lead.
8. radioactive source cask flask according to claim 5, it is characterised in that the first ray shutter and the second ray
The width that the slit of ray injection is allowed on shutter is 4mm～8mm；The slit for allowing ray to project on the ray collimator
Width be 4mm～8mm, length be 400mm～800mm, so that ray is constrained to into horizontal subtended angle as 0.1 °～0.2 °, vertically open
The fan-shaped narrow beam that 60 °～80 ° of angle.
9. radioactive source cask flask according to claim 5, it is characterised in that the radioactive source be cobalt -60, caesium -137,
Iridium-192 source, radium-226, barium -133, the radioactive activity of the radioactive source is：2.96х108Becquerel～1.11 х 1013Becquerel.
10. radioactive source cask flask according to claim 5, it is characterised in that the radioactive source cask flask also includes
Shutter, base and outer cover, shutter includes two rows triggered by the tooth bar
Cheng Kaiguan and the indicator lamp being connected with the travel switch；The shield, the drive mechanism and the fast door state
Display device is fixedly installed on the base, and the outer cover is located at the base, the shield, the drive mechanism
And outside shutter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621210210.4U CN206163133U (en) | 2016-11-09 | 2016-11-09 | Radiation source cask |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621210210.4U CN206163133U (en) | 2016-11-09 | 2016-11-09 | Radiation source cask |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206163133U true CN206163133U (en) | 2017-05-10 |
Family
ID=58658347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621210210.4U Active CN206163133U (en) | 2016-11-09 | 2016-11-09 | Radiation source cask |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206163133U (en) |
-
2016
- 2016-11-09 CN CN201621210210.4U patent/CN206163133U/en active Active
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