CN1586668A - Gamma ray radiator - Google Patents
Gamma ray radiator Download PDFInfo
- Publication number
- CN1586668A CN1586668A CN 200410053953 CN200410053953A CN1586668A CN 1586668 A CN1586668 A CN 1586668A CN 200410053953 CN200410053953 CN 200410053953 CN 200410053953 A CN200410053953 A CN 200410053953A CN 1586668 A CN1586668 A CN 1586668A
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- little
- source switch
- leading screw
- shield piece
- big
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Abstract
The gamma ray radiator includes casing, outer shielding block, inner shielding block, source switch, small screw bolt on the outer shielding block, one set of radioactive sources in fan distribution aligned to the collimator and installed in one end of the small screw bolt inserted into the inner shielding block, source switch inside the inner shielding block and with upper notch, and source switch track matching with the track holder in the casing to make the radioactive sources possess two positions of shield state and work state. The present invention uses U-238 as main shielding material and W-95 as auxiliary shielding material. The gamma ray radiator has small volume, light weight, cast iron casing to prevent the small dosage radiation of U-238 and base of the radiator. The present invention has translated source switch acting as the shielding door normally.
Description
Technical field
The present invention relates to a kind of gamma ray radiator.
Background technology
Radiotherapy apparatus needs the radiation cure functional disease of high dose, but requires equipment volume as far as possible little, and weight is light as far as possible, and the treatment space is big as far as possible.Now use radiation appliance owing to structure, shielding material adopt traditional approach, generally bulky, the weight heaviness.So the miniaturization of radiation appliance, the high dose of radioactive source become the problem that existing equipment must solve.
Summary of the invention
The object of the present invention is to provide a kind of gamma ray radiator, can accomplish that the volume of radiation appliance is little, in light weight.
The technical solution adopted for the present invention to solve the technical problems is:
The external shield piece is installed in the casing according to this from outside to inside, the inner shield piece, source switch, base is equipped with in external shield piece upper end in the case lid, little leading screw is housed on the base, one group is stretched in the inner shield piece by fan-shaped distribution and with a end that the radioactive source of collimator-alignment is contained in little leading screw, the little leading screw other end exposes outside base, base slides by bearing and primary nut, primary nut and little leading screw are formed lead screw pair, for a short time, fix from belt wheel and primary nut, for a short time, link to each other with little main pulley on being contained in the source motor through little synchronous band from belt wheel, be contained in the big main pulley of switch motor warp in the case lid, big band synchronously be contained in big leading screw on link to each other from belt wheel greatly, be fixed with big nut on the lower surface of source switch, big nut is formed lead screw pair with big leading screw, the source switch top that is arranged in the inner shield piece has breach, be fixed with guide rail on the bottom surface of source switch, guide rail matches with guide rail bracket on the inner bottom surface that is fixed on casing.
Inner shield piece, source switch material are nuclear screening material uranium 238, and base, external shield piece, collimator material are high density shielding material tungsten 95.
Both sides at casing are equipped with left rotary shaft, right spindle respectively from focus point.
The useful effect that the present invention has is:
1. radiological unit of the present invention has masked state and two kinds of positions of duty, and masked state satisfies 10
-6The magnitude attenuation relation, duty satisfies 10
-3The magnitude attenuation relation.During work, source positions is advanced to the Source Axis Distance place of 310mm, makes focus dosage rise 50%.The adverse effect that small source axis distance brings, the radiation mode that can adopt multi-radian by device structure, repeatedly focuses on reduces;
2. to adopt uranium 238 be main shielding material in the present invention, and tungsten 95 is the auxiliary shield material; Cast iron enclosed type casing is used for preventing the low dose radiation of uranium 238, and as radiation source mass-type foundation part; The volume that so just can accomplish radiation source is little, in light weight, and radioactive source is a linear array, and the volume of radiation source is further reduced;
3. gamma ray radiator of the present invention is done shield door with the source switch of parallel-moving type, and source switch can not prevent the leakage of radioactive source effectively when not treating at ordinary times;
4. radiation appliance integral outer of the present invention is equipped with left and right sides rotating shaft, can pull down from main frame easily and be transported to radioactive source franchise factory, carries out the strange land dress and changes the source, helps using on-the-spot environmental conservation.
Description of drawings
Fig. 1 is a masked state sketch map of the present invention;
Fig. 2 is a working state schematic representation of the present invention;
Fig. 3 is Fig. 2 section right view;
Fig. 4 is a source switch drive mechanism enlarged drawing.
Among the figure, 1-case lid, 2-source motor, the little main pulley of 3-, the little synchronous band of 4-, 5-little from belt wheel, the little leading screw of 6-, 7-primary nut, 8-base, 9-switch motor, the big main pulley of 10-, 11-big band, 12-synchronously greatly from belt wheel, the big leading screw of 13-, 14-big nut, 15-source switch, 16-guide rail, 17-guide rail bracket, 18-collimator, 19-radioactive source, 20-fixed cap, 21-inner shield piece, 22-external shield piece, 23-casing, 24-left rotary shaft, 25-right spindle.
The specific embodiment
The invention will be further described below in conjunction with drawings and Examples.
As shown in Figure 1 and Figure 2, the present invention includes
Comprise external shield piece 22 is installed in the casing 23 according to this from outside to inside, inner shield piece 21, source switch 15, base 8 is equipped with in external shield piece 22 upper ends in the case lid 1, little leading screw 6 is housed on the base 8, one group is stretched in the inner shield piece 21 by fan-shaped distribution and with a end that collimator 18 aligned radioactive sources 19 are contained in little leading screw 6, little leading screw 6 other ends expose outside base 8, base 8 slides by bearing and primary nut 7, primary nut 7 and little leading screw 6 are formed lead screw pair, little fixing from belt wheel 5 and primary nut 7, little from belt wheel 5 through little synchronously with 4) link to each other with little main pulley 3 on being contained in source motor 2, be contained in the big main pulley 10 of switch motor 9 warps in the case lid 1, big synchronously with 11 be contained in big leading screw 13 on link to each other from belt wheel 12 greatly, be fixed with big nut 14 on the lower surface of source switch 15, big nut 14 is formed lead screw pair with big leading screw 13, source switch 15 tops that are arranged in inner shield piece 21 have breach, be fixed with guide rail 16 on the bottom surface of source switch 15, guide rail 16 matches with guide rail bracket 17 on the inner bottom surface that is fixed on casing 23.
The 9 energising work of switch motor are by big main pulley 10, be with 11 to drive greatly from belt wheel 12 rotations greatly synchronously; Fixing from belt wheel 12 and big leading screw 13 greatly, big leading screw 13 and big nut 14 are formed lead screw pair; The rotation of big leading screw 13 drives the source switch 15 that is fixed with big nut 14 and moves on guide rail 16, opens source switch.
Then, the 2 energising work of source motor, by little main pulley 3, little be with synchronously 4 drive little of belt wheel 5 rotations; Little fixing from belt wheel 5 and primary nut 7, primary nut 7 and little leading screw 6 are formed lead screw pair; The rotation of primary nut 7 drives little leading screw 6 and moves downward vertically, and fixed radioactive source 19 arrives the plane of collimator 18 up to little leading screw 6 tops, and makes the collimating aperture central lines of the centrage and the collimator 18 of radioactive source 19, enters duty.
Otherwise the reverse rotation of switching on according to this of source motor 2, switch motor 9 is upwards vertically mentioned radioactive source 19 and is closed source switch, enters masked state.
Inner shield piece 21, source switch 15 materials are nuclear screening material uranium 238, base 8, external shield piece 22, collimator 18 materials are high density shielding material tungsten 95, do the weight that shielding material can alleviate radiation appliance greatly with uranium 238, tungsten 95, make the radiation appliance miniaturization.Case lid 1 and casing 23 are cast iron enclosed type shell, make radiation appliance become as a whole.
The radiation appliance both sides, left rotary shaft 24 and right spindle 25 are installed respectively, in the split box seat of the main frame of easily radiation appliance being packed into, also can take off radiation appliance easily and carry out the strange land dress and change the source from the center of gravity place.
Claims (3)
1. gamma ray radiator, it is characterized in that: comprise external shield piece (22) is installed in the casing (23) according to this from outside to inside, inner shield piece (21), source switch (15), base (8) is equipped with in external shield piece (22) upper end in the case lid (1), little leading screw (6) is housed on the base (8), one group is stretched in the inner shield piece (21) by fan-shaped distribution and with a end that the aligned radioactive source of collimator (18) (19) is contained in little leading screw (6), little leading screw (6) other end exposes outside base (8), base (8) slides by bearing and primary nut (7), primary nut (7) and little leading screw (6) are formed lead screw pair, little fixing from belt wheel (5) and primary nut (7), for a short time, link to each other with little main pulley (3) on being contained in source motor (2) through little synchronous band (4) from belt wheel (5), be contained in the big main pulley (10) of switch motor (9) warp in the case lid (1), linking to each other from belt wheel (12) greatly on being with (11) greatly synchronously and being contained in big leading screw (13), be fixed with big nut (14) on the lower surface of source switch (15), big nut (14) is formed lead screw pair with big leading screw (13), source switch (15) top that is arranged in inner shield piece (21) has breach, be fixed with guide rail (16) on the bottom surface of source switch (15), guide rail (16) matches with guide rail bracket (17) on the inner bottom surface that is fixed on casing (23).
2. a kind of gamma ray radiator according to claim 1, it is characterized in that: inner shield piece (21), source switch (15) material are nuclear screening material uranium 238, and base (8), external shield piece (22), collimator (18) material are high density shielding material tungsten 95.
3. a kind of gamma ray radiator according to claim 1 is characterized in that: the both sides at casing (23) are equipped with left rotary shaft (24), right spindle (25) respectively from focus point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410053953 CN1586668A (en) | 2004-08-20 | 2004-08-20 | Gamma ray radiator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410053953 CN1586668A (en) | 2004-08-20 | 2004-08-20 | Gamma ray radiator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1586668A true CN1586668A (en) | 2005-03-02 |
Family
ID=34603020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410053953 Pending CN1586668A (en) | 2004-08-20 | 2004-08-20 | Gamma ray radiator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1586668A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102097151A (en) * | 2011-01-10 | 2011-06-15 | 西北核技术研究所 | Application and preparation method of quasi-single energy pulse gamma ray source |
| CN112863729A (en) * | 2021-01-15 | 2021-05-28 | 中国核动力研究设计院 | Irradiation device |
| US11698351B1 (en) | 2022-07-29 | 2023-07-11 | King Abdulaziz University | Gamma radiography system and method of using a gamma radiography system |
-
2004
- 2004-08-20 CN CN 200410053953 patent/CN1586668A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102097151A (en) * | 2011-01-10 | 2011-06-15 | 西北核技术研究所 | Application and preparation method of quasi-single energy pulse gamma ray source |
| CN112863729A (en) * | 2021-01-15 | 2021-05-28 | 中国核动力研究设计院 | Irradiation device |
| CN112863729B (en) * | 2021-01-15 | 2022-02-11 | 中国核动力研究设计院 | Irradiation device |
| US11698351B1 (en) | 2022-07-29 | 2023-07-11 | King Abdulaziz University | Gamma radiography system and method of using a gamma radiography system |
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