CN104909166B - A kind of radioactive source pneumatic conveying controls detection means - Google Patents
A kind of radioactive source pneumatic conveying controls detection means Download PDFInfo
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- CN104909166B CN104909166B CN201510328923.4A CN201510328923A CN104909166B CN 104909166 B CN104909166 B CN 104909166B CN 201510328923 A CN201510328923 A CN 201510328923A CN 104909166 B CN104909166 B CN 104909166B
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Abstract
The invention belongs to radioactive source application, and in particular to a kind of radioactive source pneumatic conveying controls detection means.Existing radioactive source pneumatic transfer system cannot accurately control and determine radioactive source location in use, and personnel have accidental irradiation risk.Radioactive source pneumatic conveying provided by the present invention controls detection means, including the air compressor being connected with radioactive source storage tank by air delivery tube line, the first gas channel and radiation source channels being interconnected is provided with radioactive source storage tank, air delivery tube line connects the first gas channel of radioactive source storage tank, the radiation source channels connection radioactive source dispatch tube of radioactive source storage tank, it is externally provided with some for sensing the proximity switch that radioactive source passes through in radioactive source dispatch tube, proximity switch is connected with control system.The transfer operation of radioactive source can be controlled using device provided by the present invention, radioactive source location in operation is accurately grasped, prevented from causing accidental irradiation to personnel because source positions are unknown.
Description
Technical field
The invention belongs to radioactive source application, and in particular to a kind of radioactive source pneumatic conveying controls detection means.
Background technology
Radioactive isotope neutron source has small volume, simple structure, portable advantage, in oil exploration, field
Look for industry, agricultural, the doctors such as ore deposit, instrument measurement, neutron photography, reactor start-up, nuclear fuel inspection, radioactive breeding, neutron therapy
Treat and scientific research field is widely used.
In practical application, it is possible to use pneumatic mode transmits isotope neutron source.Neutron source in the presence of compressed air,
Along transfer canal, quickly move between holding vessel and illuminated target position.Pneumatic conveying mode have transfer rate it is fast, when
Between it is short the advantages of.But, although neutron source is limited in motion in transfer canal, due to neutron source it is not attached in the movement direction
Any rigid or flexible constraint that is fixedly connected, neutron source is moved back and forth in the presence of compressed air in transfer canal
When, there is certain uncertainty in its motor process and stop place, i.e., promote neutron source in transfer canal in compressed air
It is after interior motion, it is not known that when it reaches where, final to be parked in where again.Neutron source is a kind of ionizing radiation source, if not
The motor process of neutron source can be accurately tracked by and its stop place is determined, it will the wind of accidental irradiation be brought to staff
Danger.
The content of the invention
Cannot accurately control in radioactive source (particularly neutron source) pneumatic transfer system for current employing and detection is put
The drawbacks of She Yuan positions, it is an object of the invention to provide a kind of radioactive source pneumatic conveying control detection means, can be to putting
Penetrate the taking of source, storage process is controlled, and real-time detection continuously tracks the position that radioactive source is located in transmit process, protect
Card staff will not be subject to accidental exposure to injure because source positions are unknown.
To reach object above, the technical solution used in the present invention is a kind of radioactive source pneumatic conveying control detection means,
Including the air compressor being connected with radioactive source storage tank by air delivery tube line, it is provided with described radioactive source storage tank
The first gas channel being interconnected and radiation source channels, the air delivery tube line connect the first air-flow of radioactive source storage tank
Passage, the radiation source channels connection radioactive source dispatch tube of radioactive source storage tank, is externally provided with some use in the radioactive source dispatch tube
In the proximity switch that sensing radioactive source passes through, the proximity switch is connected with control system.
Further, described radioactive source dispatch tube one end is connected with the radiation source channels of radioactive source storage tank, and the other end is provided with
The irradiation end of sealing；The radioactive source dispatch tube adopts the tube-in-tube structure that outer tube and inner tube are constituted, said inner tube to put for transmission
Penetrate source；Cavity between the outer tube and inner tube constitutes the second gas channel, can be with said inner tube, radiation source channels and the
One gas channel collectively forms the gas circuit that radioactive source back and forth movement between radioactive source storage tank and irradiation end is promoted by air-flow.
Further, electromagnetic valve and two-position five-way valve are provided with air delivery tube line, are arranged on the two-position five-way valve
Air-flow outlet tube respectively with the radioactive source storage tank in the first gas channel and the radioactive source dispatch tube in
Two gas channels connect；It is respectively arranged to confirm the nuclear detector of radioactive source in the radioactive source storage tank and irradiation end.
Further, in power-off or failure, described two-position five-way valve is in the descending state of air-flow, the electromagnetic valve
State in opening；After energization, described two-position five-way valve can be cut between air-flow uplink state and air-flow downstream state
Change, the electromagnetic valve can switch and opening between in off position；Described air-flow downstream state is referred to radioactive source
The gas circuit connected state of the radioactive source storage tank is blown back from the irradiation end, described air-flow uplink state is referred to radioactive source
The gas circuit connected state of blowout radioactive source storage tank.
Further, air pressure sensing is provided with the air delivery tube line between the air compressor and the electromagnetic valve
Device.
Further, described control system includes data collecting card and is provided with the computer of control program, described two five
Port valve, electromagnetic valve, baroceptor, proximity switch, the circuit of nuclear detector are pooled to rosette, then by data collecting card
Data acquisition is carried out, is shown after being processed by the control program on computers；From computer by data collecting card to above-mentioned
Equipment output control signal.
Further, described control system is the control device being made up of independent electrical element with control panel,
The two-position five-way valve, electromagnetic valve, baroceptor, proximity switch, the circuit of nuclear detector are pooled to rosette, then connect
The control system.
Further, filter, air relief valve, oil sprayer are additionally provided with air delivery tube line.
Further, the radioactive source dispatch tube is using the low arrangement of curves in middle high two ends, and radioactive source storage tank
Position of the position less than the irradiation end of radioactive source dispatch tube.
Effect of the invention is that：
1. accurately can grasp radioactive source before motion, motion neutralization post exercise position, lift staff's
The security；
2. the accuracy and reliability of radioactive source transmit process can be improved；
3. control and detection process can reduce staff with remote-controlled operation without the need for artificial close contact radioactive source
The radiation dose being subject to.
Description of the drawings
Fig. 1 is the schematic diagram of radioactive source pneumatic conveying control detection means in the specific embodiment of the invention；
Fig. 2 is the structural representation of radioactive source storage tank in the specific embodiment of the invention；
Fig. 3 is the structural representation of radioactive source dispatch tube in the specific embodiment of the invention；
Fig. 4 is the operating diagram of radioactive source pneumatic conveying control detection means in the embodiment of the present invention；
Fig. 5 is control circle of the control system of radioactive source pneumatic conveying control detection means in the specific embodiment of the invention
Face schematic diagram；
In figure：1- air compressors, 2- baroceptors, 3- electromagnetic valves, 4- filters, 5- air relief valve, 6- oil sprayers, 7-
Two-position five-way valve, 8- radioactive source storage tanks, 9- air-flow outlet tubes, 10- radioactive source dispatch tubes, 11- proximity switches, 12- irradiations end,
13- radiates source channels, the first gas channels of 14-, the first gas-tpe fittings of 15-, 16- radioactive sources, 17- packing rings, 18- radiation source channels
Interface, 19- transmission joints, the second gas-tpe fittings of 20-, 21- outer tubes, 22- inner tubes, 23- nuts, the second gas channels of 24-.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and detailed description.
A kind of radioactive source pneumatic conveying control detection means that the present invention is provided, is the control in radioactive source pneumatic transfer system
System and detection means and control detection method.
As Figure 1 and Figure 4, radioactive source pneumatic conveying control detection means is by air compressor 1, air-flow outlet tube 9, electricity
Magnet valve 3, two-position five-way valve 7, baroceptor 2, radioactive source storage tank 8, radioactive source dispatch tube 10, can pass installed in radioactive source
Send several proximity switches 11 outside pipe 10 to constitute, additionally include and be arranged on radioactive source storage tank 8 near or within and put
The nuclear detector penetrated near the irradiation end 12 of source dispatch tube 10, connects connecing for the power line of the said equipment, control line and holding wire
Line box etc. (nuclear detector and rosette are not marked in figure), wherein electromagnetic valve 3 are open type.Due to radioactive source it is (particularly same
The plain neutron source in position) there is metal casing, according to electromagnetic induction principle, when radioactive source in radioactive source dispatch tube 10 passes through to be arranged on
During outside upper (periphery) proximity switch 11 of dispatch tube, the metal casing of radioactive source can make the magnetic field of proximity switch 11 and electricity of inducting
Stream changes, so as to output voltage signal.So, often by a proximity switch 11, the proximity switch 11 will for radioactive source
Signal is sent, the display lamp corresponding with proximity switch 11 will be lighted.(according to the mark of the existing isotope neutron source of China
It is accurate：《Americium beryllium neutro ource》(GB12714-1991)、《Industrial 252Cf neutron source》(EJ/T1129-2001)、《Plutonium beryllium neutron
Source》(EJ/T855-2008) three kinds of, conventional isotope neutron sources adopt double-level-metal involucrum.The present invention is based on electromagnetic induction
Principle, transmission neutron source dispatch tube outside, particularly the extreme higher position of dispatch tube, transition location, holding vessel entrance,
Irradiation target proximity, arranges some annular proximity switches, to detect whether neutron source passes through from this.)
As shown in Fig. 2 two sections of pipes are vertically arranged with radioactive source storage tank 8, respectively radiate source channels 13 and first
Gas channel 14；It is empty that radiation source channels 13 pass in and out the storage of the passage and radioactive source of holding vessel in holding vessel as radioactive source
Between, the first gas channel 14 is used for the circulation of compressed air, there is provided the power of neutron source turnover.One end of this two sections of passages is mutual
Connection, two sections of passages connect into U-shaped in holding vessel, and communicating position can be arranged on the middle and lower part of holding vessel, two sections of passages
Inside the pipeline of connectivity part, an annular packing ring 17 is provided with, for reducing radioactive source hitting during taking, depositing
Hit strength.Additionally, the aperture of ring washer 17 is less, it is allowed to which compressed air passes through, but radioactive source can be stopped so as to no
Can enter in the first gas channel 14 from radiation source channels 13.Radiation source channels 13 and the first gas channel 14 are not attached to logical
The other end, difference radioactive source channel interface 18 of the connect setting at the top of holding vessel and the first gas-tpe fitting 15.Wherein radioactive source
18 periphery of channel interface is provided with screw thread.
As shown in figure 3, radioactive source dispatch tube 10 is double-layer sleeve structure, including outer tube 21 and it is arranged on inside outer tube 21
Inner tube 22, dispatch tube 10 cross section upper exterior tube 21 and inner tube 22 be in concentric structure, inner tube 22 be used for transmit radioactive source, outward
The second gas channel 24 that cavity between pipe 21 and inner tube 22 is constituted is used for by compressed air.
Transmission joint 19 is installed in one end of radioactive source dispatch tube 10, transmitting joint 19 can be put with radioactive source storage tank
Penetrate source channels interface 18 to match, nut 23 is provided with transmission joint 19, by putting for the nut 23 and radioactive source storage tank
The screw thread of 18 periphery of source channels interface is penetrated, transmission joint 19 can be fixedly connected with radioactive source channel interface 18.Radioactive source is transmitted
Pipe 10 is additionally provided with the second gas-tpe fitting 20, and the second gas-tpe fitting 20 is connected with the second gas channel 24 in radioactive source dispatch tube 10
It is logical, the second gas channel 24 is passed in and out for compressed air.
Irradiation end 12 is installed in the other end of radioactive source dispatch tube 10, irradiation end 12 is double-layer sleeve structure, at irradiation end
12 cross section upper exterior tube and inner tube are in concentric structure, are gas channel between the outer tube and inner tube that irradiate end 12, and with put
The gas channel penetrated between the outer tube and inner tube of source dispatch tube 10 collectively forms the second gas channel 24.Irradiation end 12 not with biography
The one end for sending pipe connection is that (concrete grammar is tightened on irradiation end 12 using a sealing nut to sealing structure, both may be used
Stop radioactive source to seal whole radioactive source dispatch tube, the second gas channel 24 and inner tube 22 can be made again to form airflow pipeline),
Radioactive source 16 is pushed to by air-flow and just stopped here and rest in irradiation end 12.
According to the external diameter of radioactive source, the diameter of selective emission source dispatch tube；According to the length of radioactive source, can calculate and put
The source of penetrating can be by the minimum profile curvature radius of dispatch tube.The bending radius of dispatch tube is more than the minimum profile curvature radius for calculating, with
Guarantee that radioactive source will not be stuck in dispatch tube in transmit process.
The connected mode of radioactive source pneumatic conveying control detection means is as follows：
Air compressor 1 connects baroceptor 2, the connection electromagnetic valve 3 of baroceptor 2, the connection two-position five-way of electromagnetic valve 3
Valve 7, is provided with two air-flow outlet tubes 9, the other end difference connect setting of this two air-flow outlet tubes 9 on two-position five-way valve 7
On two gas-tpe fittings on radioactive source storage tank 8 and on radioactive source dispatch tube 10, (the first gas-tpe fitting 15, the second trachea connect
20), for providing compressed air (radioactive source storage tank 8 and radioactive source dispatch tube needed for radioactive source uplink and downlink
Gas channel and radioactive source Transfer pipe are provided with 10, can be empty using compression when selecting from the first 15 air inlet of gas-tpe fitting
The power of gas completes the transmission at irradiation end 12 of the radioactive source from radioactive source storage tank 8 to radioactive source dispatch tube 10；When selecting from the
Radioactive source can be pushed into back radioactive source holding vessel 8 using compressed air from irradiation end 12 reversely during two 20 air inlets of gas-tpe fitting
In)；One end of radioactive source dispatch tube 10 is connected on radioactive source storage tank 8, and the other end arranges Packed irradiation end 12, irradiation
Radioactive source can be blocked in end 12, it is possible to be fixed on the vicinity of irradiation target, thus target can be carried out using neutron source
Irradiation operation；In order to ensure the effective control to compressed air, can be with from electromagnetic valve 3 to the gas two-position five-way valve 7
Filter 4, air relief valve 5 and oil sprayer 6 are sequentially connected on stream feed-line, (are conveyed by air-flow between each equipment above
Pipeline is connected with each other).Proximity switch 11 is arranged on radioactive source dispatch tube 10 (periphery), when radioactive source is from radioactive source dispatch tube 10
During by proximity switch 11, proximity switch 11 can send detection signal.In addition, in order to more effectively confirm whether radioactive source arrives
Up to radioactive source storage tank 8 or irradiation end 12, can with the vicinity of radioactive source storage tank 8 or it is internal and irradiation end 12 it is attached
Nuclear detector is respectively provided with closely.The power line of all devices of above radioactive source pneumatic conveying control detection means, control line and
During holding wire all focuses on rosette and it is connected to control system.When actually used, radioactive source dispatch tube 10 is using middle high
The low arrangement of curves in two ends, and the height of the position of radioactive source storage tank 8 is less than the irradiation end 12 of radioactive source dispatch tube 10
The height (namely less than the position height of irradiation target) of position.
Each equipment (two-position five-way valve 7, electromagnetic valve 3, baroceptor in radioactive source pneumatic conveying control detection means
2nd, proximity switch 11, nuclear detector etc.) power line, control line and holding wire be pooled to rosette, then connection control system,
Two ways can be adopted：
The first, control system is the control device constituted using single electrical equipment, control panel (as shown in Figure 5)
It is arranged on the control device.Control panel includes：
On and off switch, for controlling the power supply supply of radioactive source pneumatic conveying control detection means；
Set direction is switched, and the direction for selecting compressed air upstream or downstream for controlling two-position five-way valve 7 is (namely
Select from 20 air inlet of the first gas-tpe fitting 15 or the second gas-tpe fitting) so that radioactive source is from radioactive source storage tank 8 along radiation
Source dispatch tube 10 is pushed to its irradiation end 12 (up), or is pushed back radioactive source along radioactive source dispatch tube 10 from irradiation end 12
In holding vessel 8 (descending)；
Start button, for controlling opens solenoid valve 3, electromagnetic valve 3 is used for controlling the compression sky provided by air compressor 1
The opening and closing of gas air-flow；
" descending " and " up " display lamp, for showing " set direction switch " selected direction of operating；
" startup " display lamp, for showing the working condition of " start button ", lights expression electromagnetic valve 3 and is in open shape
State；If extinguish representing that electromagnetic valve 3 is in closure state；The display lamp can be separately provided, it is also possible to be arranged on that " startup is pressed
On button " (i.e. the start button of tape light).
" holding vessel " display lamp, whether there is for being shown in radioactive source storage tank 8 according to the response signal of nuclear detector
Radioactive source；
" centre position " display lamp, for whether showing radioactive source by proximity switch 11, " centre position " display lamp is same
The proximity switch 11 for being connected is corresponded, and quantity is more than or equal to 1；
" irradiation target " display lamp, for the photograph of the radioactive source dispatch tube 10 is shown according to the response signal of nuclear detector
End 12 (near one end of irradiation target) is penetrated with the presence or absence of radioactive source；
SR, for resetting to the display lamp in addition to " holding vessel " display lamp, " irradiation target " display lamp
Operation；
" air gauge " dial plate, for showing the numerical value of baroceptor 2.
Second, the control line and holding wire in rosette connects computer by data collecting card, by computer and
Software program is gathered and output signal, and control panel is shown in computer in a computer using software realizing and show
Equally including the switch in above-mentioned first kind of way, button, display lamp and " air gauge " dial plate on " control panel ", and can pass through
Carry out corresponding operation on computers to realize controlling radioactive source pneumatic conveying the control of detection means to these switches, button
System, and each display lamp, dial plate and other display contents by showing " control panel " on computer, obtain radioactive source and
Radioactive source pneumatic conveying control detection means status information and data (position, the direction of motion, movement velocity such as neutron source,
Air pressure in pipeline etc.).
The corresponding present invention also provides a kind of radioactive source transmission control detection method (with reference to Fig. 1 and Fig. 5), including following step
Suddenly：
Step 1：Turn on the power switch, initialized, two-position five-way valve 7 is in downstream state, and electromagnetic valve 3 is in cut out
State, " holding vessel " display lamp are lighted, and remaining display lamp extinguishes；
Step 2：When taking radioactive source, direction of rotation selecting switch makes two-position five-way valve 7 in up to " up " position
State, connects the up route of compressed air, while " up " display lamp is lighted；Start button is pressed to open electromagnetic valve 3, it is empty
Compressed air in air compressor 1 promotes radioactive source from radioactive source storage tank 8 along radioactive source dispatch tube 10 according to " up " route
Move to irradiation end 12；Radioactive source is by, after the nearest proximity switch 11 of radioactive source storage tank 8, " holding vessel " display lamp puts out
Go out, corresponding " centre position " display lamp of proximity switch 11 light (when proximity switch 11 is more than one, each proximity switch 11
" centre position " display lamp is corresponded to all, radioactive source is by certain proximity switch 11, corresponding " centre position " display lamp
Will light)；After radioactive source is by the nearest proximity switch 11 in distance irradiation end 12, " irradiation target " display lamp is lighted；
Step 3：SR is pressed, keeps " holding vessel " display lamp and " irradiation target " LED status constant, to which
Remaining display lamp resets；
Step 4：When reclaiming radioactive source, direction of rotation selecting switch makes two-position five-way valve 7 in descending to " descending " position
State, corresponding " descending " display lamp are lighted；Press start button and open electromagnetic valve 3, the compressed air in air compressor 1 is pressed
Radioactive source is promoted to move to radioactive source storage tank 8 from irradiation end 12 along radioactive source dispatch tube 10 according to " descending " route；Radioactive source leads to
After crossing the nearest proximity switch 11 in distance irradiation end 12, " irradiation target " display lamp extinguishes, 11 correspondence of the proximity switch
" centre position " display lamp light；Radioactive source by after the nearest proximity switch 11 of radioactive source storage tank 8, " holding vessel "
Display lamp is lighted.
Also comprise the steps before opening electromagnetic valve 3 in step 4：Check that proximity switch 11 is corresponding " centre position "
The state of display lamp, if " centre position " display lamp is all illuminating state, then it is assumed that equipment is not ready for, then even if pressing
Lower start button, corresponding electromagnetic valve 3 will not also work, i.e., electromagnetic valve 3 is in closure state and cannot open.At this moment must hold
Row step 3, that is, press SR, makes 11 corresponding display lamp of all proximity switches be in OFF state, that is, is at standard
Get state ready, start button can just work.
Step 5：SR is pressed, keeps " holding vessel " display lamp and " irradiation target " LED status constant, to which
Remaining display lamp (i.e. corresponding " centre position " display lamp of proximity switch 11) resets (extinguish).
Step 6：Power supply is closed, two-position five-way valve 7 is in downstream state automatically, and electromagnetic valve 3 is in open mode automatically.
Also include in step 6：In failure condition (such as the power-off under abnormal conditions), two-position five-way valve 7 is in automatically
Downstream state, electromagnetic valve 3 are in open mode automatically.
Give one example to illustrate a kind of specifically should for radioactive source pneumatic conveying control detection means provided by the present invention
With using neutron source as radioactive source in the present embodiment.
As shown in Figures 1 to 5, the radioactive source storage tank 8 that neutron source is stored in the present invention is connected into radioactive source dispatch tube
10 (transmission joint 19 is fixedly connected on radioactive source channel interface 18), (irradiation end 12, shines the other end of radioactive source dispatch tube 10
It is sealing state to penetrate 12 one end of end, neutron source can be kept off in irradiation end 12) fix near irradiation target, two air-flow outputs
Pipe 9 distinguishes two gas-tpe fitting (radioactive source storage tanks 8 of the connect setting on radioactive source storage tank 8 and radioactive source dispatch tube 10
Airflow line by compressed air is respectively used to and by air-flow transmission radiation with being equipped with radioactive source dispatch tube 10
The transfer canal in source), constitute the airflow route for promoting radioactive source " up " and " descending ".Radioactive source pneumatic conveying control detection dress
(quantity of proximity switch 11 is at least 1 to the proximity switch 11 put, and can determine according to actual needs, the schematic diagram of the present embodiment
In be 4, only illustrate) be separately mounted on the diverse location of radioactive source dispatch tube 10, one of them is near radioactive source storage
Tank 8, an irradiation end 12 near radioactive source dispatch tube 10, and the irradiation of radioactive source storage tank 8 and radioactive source dispatch tube 10
End 12 is below the proximity switch 11 near its installation.Radioactive source dispatch tube 10 is put using the low arrangement of curves in middle high two ends
The position height for penetrating source holding vessel 8 will be less than the position height (the namely position height of illuminated target) at irradiation end 12.
When taking of neutron source is carried out, the power supply that radioactive source pneumatic conveying controls detection means is first turned on, device will
Initialized, " holding vessel " display lamp is lighted, show neutron source in holding vessel.Further, can use cooperatively and put
The nuclear detector near or within holding vessel is put, confirms that neutron source is located at " storage really by the response signal of nuclear detector
In tank ", holding vessel nuclear detector output near or within now on the control panel of control system, can be further shown
Response signal, according to the intensity of response signal, determines that " holding vessel " display lamp is lighted.Subsequently direction of rotation selecting switch to " on
OK " position, corresponding " up " display lamp are lighted, and two-position five-way valve 7 is in air-flow uplink state, connect the up of compressed air
Route (from 15 air inlet of the first gas-tpe fitting).Start button is pressed, electromagnetic valve 3 is opened, and the compressed air in air compressor 1 is pressed
Neutron source is promoted to move to irradiation end 12 from radioactive source storage tank 8 along radioactive source dispatch tube 10 according to " up " route；Neutron source is led to
Cross after the nearest proximity switch 11 of radioactive source storage tank 8, " holding vessel " display lamp extinguishes；Neutron source is close to by each and is opened
When closing 11, corresponding " centre position " display lamp is lighted successively；Neutron source is by the nearest proximity switch 11 in distance irradiation end 12
Afterwards, " irradiation target " display lamp is lighted (because irradiation target location is less than the proximity switch 11, as long as neutron source is close to by this
Switch 11, under the synergy of compressed air and gravity, neutron source can be sent to irradiation target location)；Further, can be with
With the use of " irradiation target " nuclear detector nearby is arranged on, confirm neutron source really by the response signal of nuclear detector
Jing reaches irradiation target location (irradiation end 12), now further can show on the control panel of control system " irradiation target "
The response signal of neighbouring nuclear detector output, according to the intensity of the response signal of the nuclear detector of irradiation target proximity, determines
" irradiation target " display lamp is lighted；Then, SR is pressed, 11 corresponding display lamp of all proximity switches can all extinguish, with
The state of radioactive source storage tank 8 and corresponding " holding vessel " display lamp of irradiation end 12 (irradiation target) and " irradiation target " display lamp
Will not change.
When needing reversely to transmit neutron source from irradiation target location (irradiation end 12) to radioactive source storage tank 8, rotation
Set direction is switched to " descending " position, and corresponding " descending " display lamp is lighted, and two-position five-way valve 7 is in downstream state, is connected
The descending route (from 20 air inlet of the second gas-tpe fitting) of compressed air.Now radioactive source pneumatic conveying control detection means can be detected
The state of corresponding " centre position " display lamp of all proximity switches 11, if all in illuminating state, that is, thought offhand
It is good, then even if pressing start button, corresponding electromagnetic valve 3 also will not action, still in attracting state.At this moment must press multiple
Position button, makes corresponding " centre position " display lamp of all proximity switches 11 be in OFF state, that is, is at getting out shape
State.At this moment start button is pressed, electromagnetic valve 3 is opened, the compressed air in air compressor 1 promotes neutron according to " descending " route
Move from irradiation end 12 to radioactive source storage tank 8 in source.Neutron source is connect by distance irradiation target location (irradiation end 12) is nearest
After nearly switch 11, corresponding " irradiation target " display lamp in irradiation end 12 extinguishes；When neutron source passes through each proximity switch 11, correspondence
" centre position " display lamp light successively；When neutron source is by apart from radioactive source storage 8 nearest proximity switch 11 of tank, remove
Outside corresponding " centre position " display lamp can be lighted, corresponding " holding vessel " display lamp can also be lighted.Because radioactive source storage tank 8
Position less than the proximity switch 11 nearest with which, as long as neutron source is by the proximity switch 11, in compressed air and gravity
Under synergy, neutron source smoothly can be returned in radioactive source storage tank 8.At this moment can use cooperatively and be arranged on radioactive source storage tank
By the response signal of nuclear detector, 8 nuclear detectors near or within, further confirm that neutron source is reached in holding vessel；So
Afterwards, SR is pressed, 11 corresponding display lamp of all proximity switches can all extinguish, with radioactive source storage tank 8 and irradiation end 12
The state of (irradiation target) corresponding " holding vessel " display lamp and " irradiation target " display lamp will not change.
Due to the particularity at scene, 10 possible layout of radioactive source dispatch tube must have fluctuating, in fact it could happen that horizontal section, due to
Decrease in air pressure in the course of work, it may occur however that neutron source is sent to situation of the pipeline centre position with regard to stop motion.At this moment,
The 11 corresponding display lamp of proximity switch for only passing through is lighted, not over 11 corresponding display lamp of proximity switch in extinguish
State.In this case, the direction of motion of set neutron source is unalterable, i.e. direction of rotation selecting switch, two five
The state of port valve will not change, the upstream or downstream state before remaining in that, at this moment must manually boot air compressor increasing
Plus the pressure of compressed air, then open electromagnetic valve 3 using compressed air along the direction for setting before continue to press on neutron source to
Advance target location, until it reaches target location, the corresponding display lamp of all proximity switches is in illuminating state.
Air delivery tube line connects baroceptor 2, the pressure signal of compressed air is fed back to control system, by closing
Ring is controlled, and is made radioactive source pneumatic conveying control detection means after putting into operation, is remained advance in 1 cylinder of air compressor
The compressed air of the q.s more than operating air pressure of setting, when air pressure is less than operating air pressure set in advance, can be certainly
The dynamic air compressor that starts increases the pressure of compressed air.In the case of dead electricity or other failures, two-position five-way valve 7 is located automatically
In downstream state, electromagnetic valve 3 is in open mode automatically.If now neutron source is located in irradiation end 12, will be empty in compression
Irradiation target (irradiation end 12) is left in the presence of gas.Even if the reduced pressure of compressed air (is less than peak, generally
Can be higher than operating air pressure set in advance), as long as neutron source is by being arranged to the peak of curved radioactive source dispatch tube 10,
Can be returned in radioactive source storage tank 8 under gravity, so as to ensure that staff avoids being irradiated by mistake.If now
Neutron source is located in 8 in holding vessel, and compressed air can flow through gas delivery tube line along down direction, not interfere with neutron source.
Device of the present invention is not limited to the embodiment described in specific embodiment, those skilled in the art according to
Technical scheme draws other embodiments, also belongs to the technological innovation scope of the present invention.
Claims (9)
1. a kind of radioactive source pneumatic conveying controls detection means, it is characterized in that：Including by air delivery tube line and radioactive source storage
The air compressor (1) that tank (8) is connected is deposited, the first air-flow being interconnected is provided with described radioactive source storage tank (8) and is led to
Road (14) and radiation source channels (13), first gas channel (14) of air delivery tube line connection radioactive source storage tank (8),
The radiation source channels (13) connection radioactive source dispatch tube (10) of radioactive source storage tank (8), in the radioactive source dispatch tube (10) outward
It is provided with some for sensing the proximity switch (11) that radioactive source passes through, the proximity switch (11) is connected with control system.
2. a kind of radioactive source pneumatic conveying as claimed in claim 1 controls detection means, it is characterized in that：The radioactive source transmission
Pipe (10) one end is connected with the radiation source channels (13) of radioactive source storage tank (8), and the other end sets Packed irradiation end (12)；Institute
The tube-in-tube structure that radioactive source dispatch tube (10) is constituted using outer tube (21) and inner tube (22) is stated, said inner tube (22) is put for transmission
Penetrate source；Cavity between the outer tube (21) and inner tube (22) constitutes the second gas channel (24), can with said inner tube (22),
Radiation source channels (13) and the first gas channel (14) are collectively formed and promote radioactive source in radioactive source storage tank (8) by air-flow
The gas circuit of back and forth movement and irradiation end (12) between.
3. a kind of radioactive source pneumatic conveying as claimed in claim 1 or 2 controls detection means, it is characterized in that：Convey in air-flow
Pipeline is provided with electromagnetic valve (3) and two-position five-way valve (7), the air-flow outlet tube (9) point being arranged on the two-position five-way valve (7)
Not with the radioactive source storage tank (8) in the first gas channel (14) and the second gas in the radioactive source dispatch tube (10)
Circulation road (24) connects；It is respectively arranged to confirm that the core of radioactive source is visited in the radioactive source storage tank (8) and irradiation end (12)
Survey device.
4. a kind of radioactive source pneumatic conveying as claimed in claim 3 controls detection means, it is characterized in that：In power-off or failure
When, described two-position five-way valve (7) is in the descending state of air-flow, state of the electromagnetic valve (3) in opening；After energization,
Described two-position five-way valve (7) can switch between air-flow uplink state and air-flow downstream state, and the electromagnetic valve (3) can
Switch and opening between in off position；Described air-flow downstream state is referred to blows radioactive source from the irradiation end (12)
The gas circuit connected state of the radioactive source storage tank (8) is returned, described air-flow uplink state is referred to and for radioactive source to blow out radioactive source
The gas circuit connected state of holding vessel (8).
5. a kind of radioactive source pneumatic conveying as claimed in claim 3 controls detection means, it is characterized in that：Compress in the air
Air delivery tube line between machine (1) and the electromagnetic valve (3) is provided with baroceptor (2).
6. a kind of radioactive source pneumatic conveying as claimed in claim 5 controls detection means, it is characterized in that：Described control system
Including data collecting card and the computer for being provided with control program, the two-position five-way valve (7), electromagnetic valve (3), baroceptor
(2), proximity switch (11), the circuit of nuclear detector are pooled to rosette, then carry out data acquisition by data collecting card, by
The control program is shown after processing on computers；Believed to the said equipment output control from computer by data collecting card
Number.
7. a kind of radioactive source pneumatic conveying as claimed in claim 5 controls detection means, it is characterized in that：Described control system
It is the control device being made up of independent electrical element with control panel, the two-position five-way valve (7), electromagnetic valve (3), air pressure
Sensor (2), proximity switch (11), the circuit of nuclear detector are pooled to rosette, are then attached to the control system.
8. a kind of radioactive source pneumatic conveying as claimed in claim 5 controls detection means, it is characterized in that：In air delivery tube line
On be additionally provided with filter (4), air relief valve (5), oil sprayer (6).
9. a kind of radioactive source pneumatic conveying as claimed in claim 1 or 2 controls detection means, it is characterized in that：The radioactive source
Dispatch tube (10) is transmitted less than radioactive source using the low arrangement of curves in middle high two ends, and the position of radioactive source storage tank (8)
The position at the irradiation end (12) of pipe (10).
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| CN201510328923.4A CN104909166B (en) | 2015-06-15 | 2015-06-15 | A kind of radioactive source pneumatic conveying controls detection means |
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| CN201510328923.4A CN104909166B (en) | 2015-06-15 | 2015-06-15 | A kind of radioactive source pneumatic conveying controls detection means |
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| CN104909166B true CN104909166B (en) | 2017-03-29 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108802800B (en) * | 2017-05-05 | 2023-04-14 | 中国辐射防护研究院 | Informationized self-consistent device for positioning and transporting radiation source in irradiation process |
| CN109884686B (en) * | 2019-03-18 | 2020-12-11 | 中国原子能科学研究院 | Radioactive source position detection device |
| CN112927835B (en) * | 2021-01-22 | 2024-02-20 | 散裂中子源科学中心 | Mono-energy neutron selector and control system thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001158531A (en) * | 1999-12-06 | 2001-06-12 | Tokyo Autom Mach Works Ltd | Pneumatic conveying system for bar article |
| US6939088B2 (en) * | 2002-11-15 | 2005-09-06 | Protech Structural Industries | Pneumatic transport air shifter |
| CN1712339A (en) * | 2004-06-14 | 2005-12-28 | 陆洪瑞 | Observation of moving position for conveyor |
| EP1616587A1 (en) * | 2004-07-16 | 2006-01-18 | Universität Zürich | Method and device for accurate dispensing of radioactivity |
| CN201031080Y (en) * | 2007-05-28 | 2008-03-05 | 广州博路电子设备有限公司 | Hard cash pipeline transmission system |
| CN101334477B (en) * | 2008-08-06 | 2011-11-02 | 中国原子能科学研究院 | Pneumatic transmission device |
| US8834073B2 (en) * | 2010-10-29 | 2014-09-16 | Corning Incorporated | Transport apparatus having a measuring system and methods therefor |
| CN204872887U (en) * | 2015-06-15 | 2015-12-16 | 中国原子能科学研究院 | Radiation source pneumatic conveying control detection device |
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