CN111540498A - Irradiation device system - Google Patents
Irradiation device system Download PDFInfo
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- CN111540498A CN111540498A CN202010463735.3A CN202010463735A CN111540498A CN 111540498 A CN111540498 A CN 111540498A CN 202010463735 A CN202010463735 A CN 202010463735A CN 111540498 A CN111540498 A CN 111540498A
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
- G21K5/00—Irradiation devices
- G21K5/04—Irradiation devices with beam-forming means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/185—Measuring radiation intensity with ionisation chamber arrangements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T7/00—Details of radiation-measuring instruments
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Abstract
The present invention provides an irradiator system comprising: the main body is used for shielding the stray radiation of the radioactive source and shielding the external electromagnetic interference; the scattering cavity is accommodated at the position of the maximum inner diameter hole of the third step hole, and a raised positioning part is arranged in a first through hole in the scattering cavity; the source tool sleeve is internally provided with a fourth step hole and a positioning clamping groove, and is sleeved in the first through hole after accommodating the radioactive source; a drum assembly, a part of which is arranged in the second step hole, is provided with a bunchy second through hole and rotates; the first part of the diaphragm assembly is accommodated in the first step hole and used for collimating beam current emitted by the radioactive source; when the second through hole of the rotary drum component rotates to be coaxial with the main body, the beam of the radioactive source is emitted, and after the beam is emitted, the beam is emitted after being collimated by the diaphragm component. Therefore, the radiation leakage level is lower than the environmental protection standard, the beam output or beam stop of the beam current can be controlled through the rotation of the rotary drum, and the current is limited through the diaphragm when the beam is output.
Description
Technical Field
The invention relates to the technical field of radiation measurement, in particular to an irradiator system.
Background
Irradiator systems are used for the verification, calibration and inspection of ionization chambers and therefore, generally have low leakage radiation and are easy to control.
Disclosure of Invention
An object of an embodiment of the present invention is to provide an irradiator system to achieve low-leakage radiation and facilitate beam-out and beam-stop control of a radiation source.
The present invention provides an irradiator system comprising:
the radiation source comprises a main body and a radiation source, wherein the main body is made of a heavy metal composite material, shields stray radiation of the radiation source and shields external electromagnetic interference, a first stepped hole is formed in a first end face of the main body, a second stepped hole is formed in a second end face of the main body, a third stepped hole is formed in a third end face of the main body, the second end face is perpendicular to the first end face and the third end face respectively, and the first end face is parallel to the third end face;
the scattering cavity is accommodated at the position of the maximum inner diameter hole of the third step hole after passing through the second step hole, a first through hole with the same caliber at two ends and a large caliber in the middle is formed in the scattering cavity, a raised positioning part is arranged in the first through hole, and the center of the first through hole is coaxial with the center of the main body;
the source tooling sleeve is in a stepped cylindrical shape, is internally provided with a fourth stepped hole and is provided with a positioning clamping groove, is sleeved in the first through hole of the scattering cavity after accommodating a radioactive source and is positioned at the sleeved position in the scattering cavity through the positioning clamping groove and the raised positioning part, and the center of the source tooling sleeve is coaxial with the center of the main body;
a rotary drum assembly, a part of which is arranged in the second step hole and is provided with a beam-shaped second through hole, and the rotary drum assembly controls the beam output and beam stop of the beam emitted by the radioactive source through rotation;
the first part of the diaphragm assembly is accommodated in the first step hole, and the center of the diaphragm assembly is coaxial with the center of the scattering cavity and is used for collimating beam current emitted by the radioactive source;
when the second through hole of the rotary drum assembly rotates to be coaxial with the main body, the beam of the radioactive source is emitted, and after the beam is emitted, the beam is emitted after being collimated by the diaphragm assembly.
In one possible implementation, the applicator system further comprises a front tile;
the front tile is horn-shaped, the front tile is connected with the first end face of the main body, and the second part of the diaphragm assembly enters the front tile and is fixed through the front tile.
In one possible implementation, the drum assembly includes a drum, a drum bottom shaft, and a drum;
the rotary drum is cylindrical, the bundle-shaped second through hole is formed in the side face of the rotary drum, a first screw hole is formed in the upper portion of the rotary drum, and a second screw hole is formed in the bottom of the rotary drum;
one end of the rotary drum bottom shaft is in threaded connection with the second screw hole, and the other end of the rotary drum bottom shaft is in shaft connection with the second step hole through a bearing;
one end of the rotary drum shaft is in threaded connection with the first screw hole, and the other end of the rotary drum shaft is provided with a switch adaptation port and is electrically connected with the control module through the switch adaptation port.
In one possible implementation, the applicator system further comprises a control module;
the control module is electrically connected with the power supply module and the shielding door body structure respectively;
when the power supply module is in a power supply state and the shielding door body structure is in an opening position, or when the power supply module is in a power-off state, the control module generates a first control signal and controls the rotary drum assembly to rotate through the first control signal, so that beam current of the radioactive source is blocked and beam stop control is performed;
when the power supply module is in a power supply state and the shielding door body structure is in a closed position, the control module generates a second control signal and controls the rotary drum assembly to rotate through the second control signal, so that the second through hole is coaxial with the main body and beam outgoing control is performed.
In a possible implementation manner, the control module comprises a motor controller and a motor, the bottom shaft of the rotary drum is arranged in the second step hole and is connected with the second step hole through a tapered roller bearing, and the rotary drum is sleeved with a deep groove ball bearing;
when the motor controller controls the motor to rotate through the first control signal or the second control signal, the tapered roller bearing and the deep groove ball bearing rotate, and therefore the rotary drum shaft, the rotary drum bottom shaft and the rotary drum are driven to rotate.
In one possible implementation, the applicator system further comprises an upper cover assembly;
the upper cover subassembly includes upper cover and upper cover welding body, the upper cover with the upper cover welding body meets the back, the upper cover subassembly is worn to be equipped with the rotary drum axle.
In one possible implementation manner, the diaphragm assembly comprises a diaphragm fixing cylinder and a diaphragm;
the quantity of diaphragm is 6, sets gradually in the fixed section of thick bamboo of diaphragm, the first part setting of the fixed section of thick bamboo of diaphragm is in the first step hole of main part, according to the direction of the beam current that the radiation source jetted out, six the aperture of diaphragm is arranged according to the order from big to little in the fixed section of thick bamboo of diaphragm, every the center of diaphragm with the center alignment of radiation source.
In one possible implementation, the irradiator system further comprises a tail plug assembly;
the tail plug assembly comprises a first tail plug and a second tail plug;
the first tail plug is provided with a spring assembly which is matched with the source tool sleeve in a row, fixes a radioactive source arranged in the source tool sleeve and shields stray radiation of the radioactive source;
the second tail plug is arranged in the third step hole, fixes the first tail plug and shields stray radiation penetrating through the first tail plug.
In one possible implementation, the applicator system further comprises an enclosure housing;
the packaging shell is used for packaging the main body and the front tile.
By applying the irradiator system provided by the embodiment of the invention, stray radiation can be well shielded, the level of the leaked radiation is lower than the environmental protection standard, the beam outgoing or beam stopping of the beam can be controlled by the rotation of the rotary drum, and the current is limited by the diaphragm when the beam is outgoing.
Drawings
FIG. 1 is a schematic structural diagram of an irradiator system provided by an embodiment of the present invention;
FIG. 2 is a schematic diagram of a main body according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a scattering chamber provided by an embodiment of the present invention;
fig. 4A is a schematic view of a source tool sleeve according to an embodiment of the present invention;
fig. 4B is a cross-sectional view of a source tool sleeve provided in an embodiment of the present invention;
FIG. 5A is a cross-sectional view of a first tail plug according to an embodiment of the present invention;
FIG. 5B is a cross-sectional view of a second tail plug according to an embodiment of the present invention;
FIG. 6 is a cross-sectional view of a drum assembly provided in accordance with an embodiment of the present invention;
FIG. 7A is a cross-sectional view of a diaphragm provided in accordance with an embodiment of the present invention;
FIG. 7B is a cross-sectional view of a diaphragm fixing cylinder according to an embodiment of the present invention;
FIG. 8 is a cross-sectional view of a lid assembly according to an embodiment of the present invention.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be further noted that, for the convenience of description, only the portions related to the related invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Hereinafter, the first and second terms are merely used for distinguishing and have no other meaning.
Fig. 1 is a structural diagram of an irradiator system according to an embodiment of the present invention, where the irradiator system includes: the device comprises a main body 1, a scattering cavity 2, a source tooling sleeve 3, a rotary drum assembly 4 and a diaphragm assembly 5.
Specifically, referring to fig. 2, the main body 1 is made of a heavy metal composite material, the main body 1 shields stray radiation of a radioactive source and shields external electromagnetic interference, a first step hole 11 is formed in a first end face of the main body 1, a second step hole 12 is formed in a second end face of the main body, a third step hole 13 is formed in a third end face of the main body 1, the second end face is perpendicular to the first end face and the third end face, and the first end face is parallel to the third end face.
Referring to fig. 3, the scattering cavity 2 passes through the second stepped hole 12 and is accommodated in the position of the maximum inner diameter of the third stepped hole 13, a first through hole 21 having the same caliber at both ends and a large caliber at the middle is opened in the scattering cavity 2, a protrusion positioning portion (not shown) is provided in the first through hole 21, and the center of the first through hole 21 is coaxial with the center of the main body 1.
Specifically, the third stepped hole 13 in the main body 1 can accommodate the scattering cavity 2, so that radiation of the radioactive source is shielded through the scattering cavity 2, and the radioactive source can be fixed in the center of the main body subsequently due to the arrangement of the scattering cavity 2. The scattering cavity 2 is of a cylindrical structure, the size of the scattering cavity is matched with the maximum aperture of the third stepped hole 13, and the scattering cavity 2 can be placed in the third stepped hole 13 after passing through the second stepped hole 12.
Referring to fig. 4A and 4B, the source tooling sleeve 3 is stepped cylindrical, is provided with a fourth step hole 31 therein, is provided with a positioning clamping groove 32, accommodates the radioactive source, is sleeved in the first through hole 21 of the scattering cavity 2, and positions the sleeving position in the scattering cavity 2 through the positioning clamping groove 32 and the protruding positioning portion, and the center of the source tooling sleeve 3 is coaxial with the center of the main body 1.
Specifically, in order to better fix the radioactive source, the radioactive source can be placed in the source tooling sleeve 3 first and then the source tooling sleeve is sleeved in the scattering cavity 2, and the position of the source tooling sleeve 3 in the scattering cavity 2 is fixed through the positioning clamping groove 32 set on the source tooling sleeve 3. And stray radiation can be shielded and the radioactive source can be fixed through the tail blocking assembly 8.
Wherein, stifled subassembly 8 of tail includes that first tail blocks 81 and second tail block 82, refer to fig. 5A and fig. 5B respectively, can be provided with the recess 811 that is used for holding spring assembly on the stifled 81 of first tail, through arranging first tail block 81 in source frock sleeve 3 to fix the radiation source in source frock sleeve 3 through the spring assembly of holding in the recess 811, the structure of first tail block 81 and the structure phase-match of source frock sleeve 3. The second tail plug 82 is arranged outside the first tail plug and is used for fixing the first tail plug 81, so that stray radiation of a radioactive source is better shielded, and it can be understood that other tail plugs can be arranged to be matched with the shape of the third stepped hole 13, so that stray radiation shielding is realized through better matching with a main body.
The drum assembly 4, a part of which is disposed in the second stepped hole 12, has a beam-shaped second through hole 411, and performs beam-out control and beam-stop control on the beam current emitted from the radiation source by rotation.
Specifically, referring to fig. 6, the drum assembly 4 includes a drum 41, a drum bottom shaft 42, and a drum shaft 43;
the rotating drum 41 is cylindrical, a bundle-shaped second through hole 411 is arranged on the side surface of the rotating drum 41, a first screw hole 412 is formed in the upper part of the rotating drum 41, and a second screw hole 413 is formed in the bottom of the rotating drum; one end of the rotary drum bottom shaft 42 is in threaded connection with the second screw hole 413, and the other end of the rotary drum bottom shaft 42 is in threaded connection with the second stepped hole 12; one end of the rotating drum shaft 43 is screwed with the first screw hole 412, and the other end of the rotating drum shaft 43 is provided with a switch adapting port 431 and is electrically connected with the control module through the switch adapting port 431.
Wherein the control module (not shown in the figures) comprises a motor controller and a motor for controlling the rotation of the drum assembly 4.
The control module is electrically connected with the power supply module and the shielding door body structure respectively; the power supply module is used for supplying power to the irradiator system, the shielding door body structure is used for shielding the irradiator system, and the irradiator system is arranged in the shielding door body structure.
When the power supply module is in a power supply state and the shielding door body structure is in an opening position, or when the power supply module is in a power-off state, the control module generates a first control signal and controls the rotary drum assembly to rotate through the first control signal, so that beam current of the radioactive source is blocked and beam stopping control is performed;
when the power supply module is in a power supply state and the shielding door body structure is in a closed position, the control module generates a second control signal and controls the rotary drum assembly to rotate through the second control signal, so that the second through hole is coaxial with the main body and beam outgoing control is performed.
The irradiation device system is arranged in the shielding door body structure, a signal can be generated and sent to the motor controller after the door is opened, the motor controller can generate a first control signal, and the motor is controlled to drive the rotary drum assembly to rotate through the first control signal, so that the position of the second through hole in the rotary drum is not overlapped with the position of the beam of the radioactive source, the beam of the radioactive source is blocked, and beam stopping control is achieved. Correspondingly, after the power is cut off, the motor controller can also perform the same control as that performed after the shielding door body structure is opened, so that the rotary drum rotates to a set first position to realize beam stopping control.
When the shielding door body structure is closed and the power supply module is in a power supply state, if the current position of the rotary drum is the first position, the motor controller controls the motor by generating a second control signal, so that the rotary drum assembly is driven to rotate by the motor, and the rotary drum rotates to a set second position to realize beam outlet control. The second position may be such that the centre line of the second through hole coincides with the centre line of the radiation source.
Wherein, the control module comprises a motor controller (not shown in the figure) and a motor (not shown in the figure), the rotary drum bottom shaft 42 is arranged in the second step hole and connected with the second step hole 12 through a tapered roller bearing 44, and a deep groove ball bearing 45 is sleeved on the rotary drum shaft 43;
when the motor controller controls the motor to rotate through the first control signal or the second control signal, the tapered roller bearing 44 and the deep groove ball bearing 45 rotate, so as to drive the drum shaft 43, the drum bottom shaft 42 and the drum 41 to rotate.
And a first part of the diaphragm assembly 5 is accommodated in the first stepped hole 11, and the center of the diaphragm assembly 5 is coaxial with the center of the scattering cavity 2 and is used for collimating beam current emitted by a radioactive source. When the second through hole of the rotary drum component 5 rotates to be coaxial with the main body, the beam of the radioactive source is emitted, and after the beam is emitted, the beam is emitted after being collimated by the diaphragm component.
The applicator system further comprises a front tile 6; the front tile 6 is horn-shaped, the front tile is connected with the first end face of the main body, and the second part of the diaphragm assembly enters the front tile and is fixed through the front tile.
Specifically, referring to fig. 7A and 7B, the diaphragm assembly 5 includes a diaphragm 51 and a diaphragm fixing cylinder 52; the number of the diaphragms 51 is 6, the diaphragms 51 are sequentially arranged in the diaphragm fixing cylinder 52, the first part of the diaphragm fixing cylinder 52 is arranged in the first stepped hole 11 of the main body 1, the aperture diameters of the six diaphragms 51 are arranged in the diaphragm fixing cylinder 52 from large to small according to the direction of beam current emitted by the radioactive source, and the center of each diaphragm 51 is aligned with the center of the radioactive source.
The number of diaphragms 51 is obtained through a plurality of experiments, and the required radiation field can be obtained at a specific position through the diaphragms 51, for example, 100 cm in front of the source, and the diameter of the radiation field is 100 mm.
Further, the irradiator system includes a leveling base 10 to level the main body 1 to ensure that the whole irradiator system is level during irradiation measurement.
Wherein, each part in the main body 1, the scattering cavity 2, the source tool sleeve 3, the rotary drum component 4, the diaphragm component 5, and the like irradiator system is made of alloy materials. The alloy materials include, but are not limited to, lead and cadmium. The radioactive source is Co-60 radioactive source.
Furthermore, the irradiator system also comprises a rotary adjusting rod 9, a leveling base 10, a universal hanging wheel 20, a graphite sheet 30, a distance measuring disc 40, a tank body supporting column 50 and a base supporting column 60, wherein the rotary adjusting rod 9 is convenient for taking out or placing the radioactive source by adjusting the inclination angle of the main body. The leveling base 10 levels the main body 1, thereby ensuring that the main body is in a horizontal state during irradiation measurement. The graphite sheet 30 is used to shield the radioactive source when not in use. The distance measuring plate 40 is used to measure the distance between the radiation source and the reference device. The tank supporting column 50 is used for supporting a main body, the base supporting column 60 is used for supporting the assembled main body, and the assembled main body can be moved through the universal hanging wheel 10.
Further, the irradiator system may detect the ionization chamber. Therefore, the present application may further provide: and the ionization chamber adjusting device (not shown in the figure) is used for adjusting the position of the ionization chamber, so that the positions of the ionization chamber and the radioactive source are optimal, and the detection of the ionization chamber is realized.
The ionization chamber adjusting device comprises a base, wherein a first guide rail is arranged on the base;
ionization chamber position adjustment device includes:
the first-stage moving object platform is arranged on the first guide rail in a sliding mode, translates on the first guide rail and is provided with a second guide rail, the first guide rail is along the beam direction, and the second guide rail is perpendicular to the first guide rail;
the secondary moving carrying platform is arranged on the second guide rail in a sliding mode and translates on the second guide rail;
the third-stage movable carrying platform is connected with the second-stage movable carrying platform and comprises a vertical lifting adjusting platform, and a clamp is arranged on the vertical lifting adjusting platform and used for clamping the ionization chamber and adjusting the height of the ionization chamber;
the adjusting platform is vertically lifted to adjust the height of the ionization chamber, so that the beam center of the radioactive source is aligned to the sensitive volume center of the ionization chamber.
The operation of the applicator system will now be described.
During assembly, firstly, the scattering cavity 2 penetrates through the second step hole 12 of the main body 1, then the maximum aperture of the third step hole 13 is arranged, and then, after the radioactive source is arranged in the source tooling sleeve 3, the source tooling sleeve 3 is matched with the protruding positioning part of the scattering cavity through the positioning clamping groove and is fixedly inserted in the scattering cavity. Subsequently, through first tail stifled 81, radioactive source to in the source frock sleeve 3 is fixed, at this moment, the spring assembly that first tail was stifled plays the fastening fixed action to the radioactive source, subsequently, rethread second tail is stifled 82, compress tightly first tail stifled 81, second tail is stifled 82 can the spiro union on first tail is stifled 81, subsequently, can also be stifled (not shown in the figure) through the third tail, compress tightly the second tail, and with the stifled spiro union of third tail in the main part, thereby cooperate through a plurality of other tail stifled and main part 1, shield the stray radiation of radioactive source.
After the rotary drum bottom shaft 42 is placed in the second step hole 12, the rotary drum bottom shaft is connected with the second step hole through the deep groove bearing, the rotary drum is in threaded connection with the rotary drum bottom shaft, then the rotary drum shaft is in threaded connection with the rotary drum, the rotary drum shaft is provided with the tapered roller bearing, the upper cover assembly 7 is buckled on the rotary drum shaft, after the upper cover assembly 7 is buckled on the rotary drum shaft, the rotary drum shaft extends out of the upper cover assembly 7 and is sleeved with the deep groove ball bearing, the switch adapting port of the extending part can be electrically connected with the motor, when the motor is controlled by the motor controller, the tapered roller bearing and the deep groove ball bearing are driven by the motor to rotate, so that the rotary drum shaft and the rotary drum bottom shaft are driven to rotate, and the rotary drum is driven to rotate through the rotary drum shaft and the bottom shaft, so that beam output.
Referring to fig. 8, the upper cover assembly 7 includes an upper cover 71 and an upper cover welding body 72, and after the upper cover 71 and the upper cover welding body 72 are connected, the upper cover assembly 7 penetrates through the drum shaft.
The control module formed by the motor and the motor controller is electrically connected with the power supply module and the shielding door body structure, so that when the shielding door body structure is opened, the motor controller controls the motor to drive the rotary drum assembly to rotate, and beam stopping control is performed. When the shielding door body structure is closed and the power supply module supplies power, the motor controller controls the motor to drive the rotary drum assembly to rotate so as to perform beam outgoing control.
The diaphragm is arranged behind the diaphragm fixing cylinder, one part of the diaphragm fixing cylinder is arranged in the first step hole of the main body, the other part of the diaphragm fixing cylinder is arranged in the front tile, the front tile penetrates through the diaphragm fixing cylinder and then is connected with the main body, and beam current during beam outgoing is limited through the diaphragm.
After the main body is packaged by the packaging shell, the packaged main body moves through the universal hanging ring, the packaged main body moves into the shielding door body structure, the main body is fixed on the leveling base through the main body supporting column, and leveling is performed through the leveling base. And for the leveling base, the base is fixed through the base support column. When the second tail plug is packaged, the second tail plug is further fixed through the rear panel.
When the irradiator system is in a shielding door body structure, after leveling is carried out through the leveling base, after the power supply module is electrified, the stray radiation is shielded by the spherical beam emitted by the radioactive source through the main body, the plurality of tail plugs, the scattering cavity and the front tile, the beam is ensured to be emitted towards the through hole of the rotary drum, and after the stray radiation is limited by the diaphragm and irradiates on the reference device, the beam emitting position is adjusted, so that the cross center of the beam is superposed with the center of the reference device; changing the relative distance between the reference device and the radioactive source, and adjusting the emergent position of the beam again to ensure that the cross center of the beam coincides with the center of the reference device again; and continuously adjusting the emergent position of the beam until the cross center of the beam is coincided with the center of the reference device. Thereby realizing the calibration of the reference value of the radioactive source.
After the reference value is calibrated, when the ionization chamber is detected through the irradiator system, the ionization chamber is arranged on an ionization chamber adjusting device, the ionization chamber adjusting device comprises a base and an ionization chamber position adjusting device, and the base is provided with a first guide rail.
The primary moving object carrying platform is arranged on the first guide rail in a sliding mode, translates on the first guide rail and is provided with a second guide rail, the first guide rail is along the beam direction, and the second guide rail is perpendicular to the first guide rail; the secondary moving carrying platform is arranged on the second guide rail in a sliding mode and translates on the second guide rail; the three-stage moving carrying platform is connected with the two-stage moving carrying platform and comprises a vertical lifting adjusting platform, and the vertical lifting adjusting platform is provided with a clamp for clamping the ionization chamber and used for adjusting the height of the ionization chamber; the primary moving carrying platform is adjusted to move in a translation mode on the first guide rail, the secondary moving carrying platform is adjusted to move in a translation mode on the second guide rail, and the ionization chamber is adjusted in height through the vertical lifting adjusting platform, so that the beam center is aligned to the sensitive volume center of the ionization chamber and is the same as the main beam center of the ionization chamber.
Specifically, the primary moving object stage is adjusted along the beam direction, i.e., the X-axis adjustment is performed. The secondary moving carrying platform is adjusted along a Y axis which is vertical to the X axis direction in the horizontal plane. And the three-stage moving loading platform is adjusted to lift along the vertical direction, namely adjusted along the Z axis.
By applying the irradiator system provided by the embodiment of the invention, stray radiation can be well shielded, the level of the leaked radiation is lower than the environmental protection standard, the beam outgoing or beam stopping of the beam can be controlled by the rotation of the rotary drum, and the current is limited by the diaphragm when the beam is outgoing.
Those of skill would further appreciate that the various illustrative components and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied in hardware, a software module executed by a processor, or a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The above embodiments are provided to further explain the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the scope of the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. An irradiator system, comprising:
the radiation source comprises a main body and a radiation source, wherein the main body is made of a heavy metal composite material, shields stray radiation of the radiation source and shields external electromagnetic interference, a first stepped hole is formed in a first end face of the main body, a second stepped hole is formed in a second end face of the main body, a third stepped hole is formed in a third end face of the main body, the second end face is perpendicular to the first end face and the third end face respectively, and the first end face is parallel to the third end face;
the scattering cavity is accommodated at the position of the maximum inner diameter hole of the third step hole after passing through the second step hole, a first through hole with the same caliber at two ends and a large caliber in the middle is formed in the scattering cavity, a raised positioning part is arranged in the first through hole, and the center of the first through hole is coaxial with the center of the main body;
the source tooling sleeve is in a stepped cylindrical shape, is internally provided with a fourth stepped hole and is provided with a positioning clamping groove, is sleeved in the first through hole of the scattering cavity after accommodating a radioactive source and is positioned at the sleeved position in the scattering cavity through the positioning clamping groove and the raised positioning part, and the center of the source tooling sleeve is coaxial with the center of the main body;
a rotary drum assembly, a part of which is arranged in the second step hole and is provided with a beam-shaped second through hole, and the rotary drum assembly controls the beam output and beam stop of the beam emitted by the radioactive source through rotation;
the first part of the diaphragm assembly is accommodated in the first step hole, and the center of the diaphragm assembly is coaxial with the center of the scattering cavity and is used for collimating beam current emitted by the radioactive source;
when the second through hole of the rotary drum assembly rotates to be coaxial with the main body, the beam of the radioactive source is emitted, and after the beam is emitted, the beam is emitted after being collimated by the diaphragm assembly.
2. The applicator system of claim 1, further comprising a front tile;
the front tile is horn-shaped, the front tile is connected with the first end face of the main body, and the second part of the diaphragm assembly enters the front tile and is fixed through the front tile.
3. An applicator system as claimed in claim 1, wherein said drum assembly comprises a drum, a drum bottom shaft and a drum;
the rotary drum is cylindrical, the bundle-shaped second through hole is formed in the side face of the rotary drum, a first screw hole is formed in the upper portion of the rotary drum, and a second screw hole is formed in the bottom of the rotary drum;
one end of the rotary drum bottom shaft is in threaded connection with the second screw hole, and the other end of the rotary drum bottom shaft is in shaft connection with the second step hole through a bearing;
one end of the rotary drum shaft is in threaded connection with the first screw hole, and the other end of the rotary drum shaft is provided with a switch adaptation port and is electrically connected with the control module through the switch adaptation port.
4. The irradiator system of claim 1, further comprising a control module;
the control module is electrically connected with the power supply module and the shielding door body structure respectively;
when the power supply module is in a power supply state and the shielding door body structure is in an opening position, or when the power supply module is in a power-off state, the control module generates a first control signal and controls the rotary drum assembly to rotate through the first control signal, so that beam current of the radioactive source is blocked and beam stop control is performed;
when the power supply module is in a power supply state and the shielding door body structure is in a closed position, the control module generates a second control signal and controls the rotary drum assembly to rotate through the second control signal, so that the second through hole is coaxial with the main body and beam outgoing control is performed.
5. The irradiator system of claim 4, wherein the control module comprises a motor controller and a motor, the drum bottom shaft is in the second stepped hole and is connected with the second stepped hole through a tapered roller bearing, and the drum shaft is sleeved with a deep groove ball bearing;
when the motor controller controls the motor to rotate through the first control signal or the second control signal, the tapered roller bearing and the deep groove ball bearing rotate, and therefore the rotary drum shaft, the rotary drum bottom shaft and the rotary drum are driven to rotate.
6. The applicator system of claim 3, further comprising an upper cover assembly;
the upper cover subassembly includes upper cover and upper cover welding body, the upper cover with the upper cover welding body meets the back, the upper cover subassembly is worn to be equipped with the rotary drum axle.
7. The irradiator system of claim 1, wherein the diaphragm assembly comprises a diaphragm-holding cylinder and a diaphragm;
the quantity of diaphragm is 6, sets gradually in the fixed section of thick bamboo of diaphragm, the first part setting of the fixed section of thick bamboo of diaphragm is in the first step hole of main part, according to the direction of the beam current that the radiation source jetted out, six the aperture of diaphragm is arranged according to the order from big to little in the fixed section of thick bamboo of diaphragm, every the center of diaphragm with the center alignment of radiation source.
8. The irradiator system of claim 1, further comprising a trailing plug assembly;
the tail plug assembly comprises a first tail plug and a second tail plug;
the first tail plug is provided with a spring assembly which is matched with the source tool sleeve in a row, fixes a radioactive source arranged in the source tool sleeve and shields stray radiation of the radioactive source;
the second tail plug is arranged in the third step hole, fixes the first tail plug and shields stray radiation penetrating through the first tail plug.
9. The applicator system of claim 2, further comprising an enclosure housing;
the packaging shell is used for packaging the main body and the front tile.
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| CN115332040A (en) * | 2022-08-12 | 2022-11-11 | 西安石油大学 | Small ionization chamber |
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