KR100581373B1 - Multi-source irradiation device - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a multi-source radiation device, wherein a multi-source radiation device is used as a multi-source radiation device to measure and calibrate a calibration sensor of a dosimeter for measuring radiation pollution standards. It is a multi-source radiation device used to measure and calibrate various dosimeters.The source storage container is installed behind the collimator, and the source of the selected capacity in the collimator on the correct axis of the irradiation device is installed by using the encoder. The collimator is used to obtain a certain range of dose, and in case of emergency due to power failure and abnormality of the equipment, the shield plate is automatically lowered to prevent radiation leakage. The present invention has the advantage that it is possible to accurately and continuously perform the calibration work of the dosimeter because each source can be accurately positioned on the axis of the irradiation apparatus and can be irradiated to maintain the correct dose semi-permanently without error.

Description

MULTI SOURCE IRRADIATION APPARATUS}

1 to 12 are views of the multi-ray radiation irradiation apparatus according to the present invention,

1 is a partially cutaway plan view of a multi-source radiation device;

2 is a partially cutaway side view of a multi-source radiation device;

3 is a partial front view of a multi-source radiation device.

4 and 5 are a partially cut-away plan view and a front view showing the structure of the rotating container and the shielding container for the rotation of the source.

Figure 6 is a cross-sectional view showing a form coupled to the source storage container to the shield container for rotation of the source.

7 to 9 are cross-sectional views showing different types of collimators.

10 to 12 is a front view showing a collimator front disc of different forms.

<Description of Symbols for Main Parts of Drawings>

1: source 10: drive box

20: shielded box 21: outer shell

22: lead 23: insertion groove

30: rotating shaft 40: driving means

41: servo motor 50: shielded container for source rotation

51: cylindrical housing 52: lead

53: reference position mark 54: source insertion unit

60: collimator 61: outer cylinder

62,63: lead ring 64: disc

64a: Through air 70: Sailor storage container

71: cylinder 72: lead

73: negative 74: sailor receiving home

75 fastener 80 shielding means

81: guide 82: shielding plate

82a: outer shell 82b: lead

83: support interval 84: air cylinder

85: plunger 90: encoder

100: expect 110: position adjusting device

The present invention relates to a multi-source radiation device, in particular to completely block the external leakage of radiation irradiated from the source as well as to accurately place each source on the axis of the irradiation device to maintain a semi-permanent accurate dose without error The present invention relates to a multi-source radiation irradiation apparatus.

In general, the multi-source radiation irradiation apparatus in the prior art installed the source storage container horizontally on the lower portion of the irradiation device, and withdraw the source from the upper portion by using the air cylinder and air pad from the upper portion to irradiate for a predetermined time, and after the work is finished again It is intended to be used as a storage container, but as time passes, deflection and leakage of adsorptive force occurs due to asymmetrical wear of the air pad, which makes it difficult to transport the source to the correct irradiation position and the source cannot be drawn out horizontally. It is difficult to carry out corrective calibration due to uneven dose, and due to the wear of the pad, it may fall down when the source is pulled out or get stuck in the through groove of the rod, causing radiation shielding and operation problems, causing radiation leakage.

The present invention was devised to solve the above problems and defects as described above, and completely prevents external leakage of the radiation irradiated from the source, as well as accurately positioning each source on the axis of the irradiation apparatus. It is an object of the present invention to provide a multi-ray radiation irradiation apparatus capable of maintaining a semi-permanently accurate dose without error.

In order to achieve the above object, the multi-ray source irradiation apparatus according to the present invention is installed so that the rotating shaft is rotated by a driving means such as a servo motor in the inside of the driving unit box, and a source for rotating the source provided with a plurality of source insertion portions of the rotating shaft. The shielding container is fixed and installed so as to rotate inside the shielding box coupled to the front part of the drive box. The collimator is detachably coupled to the insertion groove of the shielding box. A plurality of received source storage containers are detachably coupled, and a shielding means (shutter means) for opening and closing the outlet of the collimator is installed at the front portion of the shielding box.

In addition, the shielding box is installed so that the surroundings of the source is completely shielded so as to effectively block the radiation radiated from the source by using lead, it is installed detachably to facilitate the replacement and repair of the source, so that there is no radiation leakage in the coupling portion Is installed.

In addition, the source storage container is rotated at regular intervals by the source container rotation shielding container so that the source can be placed in the irradiation position in the reference position of the shielding box, and a sensor such as an encoder for detecting rotation is installed so that the source is accurately positioned. It is installed to keep on.

The collimator is for irradiating the size of the radiation beam with a radius at a constant distance, and the outer tube to the top of the source to the outside of the conical shape is gradually increased in diameter and a plurality of lead ring is inserted inside the radiation area is uniform And to prevent scattering at the source.

The shield container for rotation of the source that can store the multi-source source is installed so that no leakage radiation is generated in the source storage state, and the irradiation position where the source is irradiated in accordance with the same axis as the collimator, and safely stored when not irradiated. It is configured to be moved to a storage position.

The source storage container is installed to protect the source and the source of different sizes to come on the axis of the collimator of the irradiation device, the source capsule is connected to the source rotation device is installed to be moved to the irradiation position and storage position, The source capsule is composed of a structure that is separated from the rotating device when the source moves so that a difference in the rising or falling speed does not occur.

The source rotator for rotating the source has the function of moving the source that is being stored to the irradiation position or the source that is being investigated to the storage position, and when the source is moved by rotating the source storage container, the selected source of the source storage container is the same. It is installed to be onboard. In addition, the source rotation shielding container for rotating the source is a structure capable of shielding radiation, disassembly to facilitate replacement and repair of the source, and is configured in a structure that smoothly rotates and stops to select the source. .

The source selection device consists of a servo motor, encoder and controller, so that the source mounted on the shield container for source rotation is maintained at the reference position in preparation for irradiation, and the source for irradiation is moved to the correct position mechanically. The controller controls the selected information to move to the irradiation position.

The apparatus for irradiating the source is moved to a reference position, the irradiation position of the source, the storage position, and provided with a conventional position control device to adjust the position by moving up and down, left and right or rotate so as to be accurately irradiated to the irradiation area The function of moving the irradiation device should be smoothly rotated or moved in consideration of the load, and should be installed so that it can be firmly fixed in the stopped position control position.

The shielding means is installed to open and close the shield (shutter) in front of the collimator in order to prepare for abnormality or power failure of the device, and automatically descends by the control of the control circuit at the time of power failure, emergency and irradiation work To shield leaks.

More specifically, the multi-line radiation device according to the present invention is a rectangular drive box, a rotational shaft rotatably installed in the longitudinal direction inside the drive box, the drive means for driving the rotary shaft, and fixed to the tip of the rotary shaft Lead is filled in the cylindrical housing which is rotatably installed, and a reference position mark is formed on the front of the housing, and a plurality of source insertion portions are formed in a concentric circle with the reference position mark, and a shield container for rotation of the source rotated to a certain depth; And a shielding box coupled to the front portion of the driving unit box so that a shielding container for rotation of the source is rotatably installed therein and filled with lead around the shielding container for rotation of the source in the outer shell, and lead at the outer surface of the shielding box. Collimator detachably coupled to the insertion groove formed through the , And crew storage vessel crew received and removably coupled to the crew of the insertion portion only shielding container once the crew, is provided in the front portion of the shield box is configured to include the shielding means to open and close the exit of the collimator.

Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail as follows.

1 to 12 is a view of the multi-ray source irradiation apparatus according to the present invention, Figure 1 is a partially cutaway plan view of the multi-ray source irradiation device, Figure 2 is a partially cutaway side view of the multi-ray source radiation device, Figure 3 Partial front views of the multi-source radiation irradiation apparatus are respectively shown, and Figs. 4 and 5 are partially cutaway plan views and front views showing the structure of the rotating shaft and the shielding container for the source rotation, and Fig. 6 shows the source in the shielding container for the source rotation. A cross-sectional view is shown showing a combined storage container.

7 to 9 are cross-sectional views showing different types of collimators, and FIGS. 10 to 12 are front views showing different types of collimator front plates.

As shown in the drawing, the rectangular drive part box 10, the rotating shaft 30 which is rotatably installed in the longitudinal direction inside the driving part box 10, and the driving means 40 for driving the rotating shaft 30. And, lead 52 is filled in the interior of the cylindrical housing 51 is fixed to the front end of the rotating shaft 30 is rotatably installed, and the reference position mark 53 is formed on the front of the housing 51 A plurality of source inserting portions 54 are coupled to the front portion of the drive box 10 and the shielding container 50 for the source rotation, which is formed concentrically with the reference position mark 53 to a predetermined depth of the lead 52. A shielding box 20 having a source rotation shielding container 50 rotatably installed therein and having lead 22 filled in the periphery of the source rotation shielding container 50 inside the outer shell 21; In the insertion groove 23 formed through the lead 22 in the outer shell 21 of the box 20 A collimator 60 that is detachably coupled, a source storage container 70 in which the source 1 is received and detachably coupled to the source insertion portion 54 of the shielding container 50 for rotation of the source, and the shielding Is installed in the front of the box 20 is configured to include a shield means 80 for opening and closing the outlet of the collimator 60.

The drive unit box 10 is installed on the base 100 via a normal position adjusting device 110, and the rotation shaft 30 is mounted on the support 11 fixed to the inside of the drive unit box 10. It is coupled via a bearing 31.

A servo motor 41 is used as the driving means 40, and the servo motor 41 is fixed to the support 12, and the shaft of the servo motor 41 is coupled to the end of the rotation shaft 30. Are joined via

An encoder 90 is installed at one side of the rotation shaft 30, and a controller (not shown) controls the servomotor 41 to control the rotation of the rotation shaft 30 by a signal generated by the encoder 90. Control. In Figs. 1 and 2, reference numerals 91 and 92 show gears.

The source storage container 70 is, for example, the disc 73 is welded to the open end of the aluminum cylinder 71 and the lead 72 is filled therein and the lead 72 is fixed at the center of the disc 73. The source receiving groove 74 is formed to the depth. The capsule-type source 1 is inserted into the source receiving groove 74 of the source storage container 70 and is fastened by the fastener 75.

As such, the source storage container 70 in which the source 1 is accommodated is inserted into the source insertion portion 54 of the shield container 50 for rotation of the source, and the peripheral portion of the source storage container 70 is the source insertion portion of the housing 51. (54) It is fastened with a bolt to the fastening part 55 formed in the peripheral part.

The collimator 60, for example, a plurality of lead rings 62, 63 are coupled to the inside of the brass outer cylinder 61, the front portion is coupled to the disc 64 provided with a through hole (64a) in the center In this configuration, the shape in which the lead rings 62 and 63 are coupled is changed according to the type of radiation to be irradiated from the source 1.

The shielding means 80 is a guide 81 is fixed to the front of the shielding box 20, the shielding plate 82 filled with lead (82b) inside the outer shell (82a) is the inside of the guide 81 The air cylinder 84 is coupled to the support interval 83 fixed to the upper surface of the shielding box 20, and the plunger 85 of the air cylinder 84 is coupled to the lifting plate to the shielding plate 82 The shield plate 82 is fixed to the upper end of the air cylinder 84 so as to be opened and closed.

Referring to the operation of the multi-ray radiation irradiation apparatus according to the present invention as described above are as follows.

When the multi-ray source radiation apparatus according to the present invention is stopped, the reference position mark 53 displayed on the front side of the shielding container for rotation of the source 50 is located on the axis of the collimator 60, and the shielding container for rotation of the source 50 The source 1 mounted on the source inserting portion 54 of the source 1 is held in a storage position off the axis of the collimator 60 to lead 22, 52 of the shielding box 20 and the shielding container 50 for source rotation. Radiation leakage is prevented.

In this initial reference position, for example, to irradiate radiation required by a need such as calibrating a dosimeter, power is applied and the controller is operated to drive the servomotor 41 to drive the rotating shaft 30. When rotating by the set angle, the shielding container 50 for rotation of the source fixed to the distal end of the rotating shaft 30 is rotated so that the set source 1 is the irradiation position where the reference position mark 53 was located, that is, the axis of the collimator 60. In this case, the plunger 85 of the air cylinder 84 raises the shielding plate 82 so that the outlet of the collimator 60 is opened so that the radiation generated from the source 1 is transmitted through the collimator 60. Is investigated.

After calibrating the dosimeter using the radiation irradiated in this way, the servomotor 41 is again driven to rotate the shielding container 50 for rotation of the source, and the source 1 is moved back to the storage position.

As such, while moving the source 1 from the storage position to the irradiation position, and from the irradiation position back to the storage position, the rotation angle of the rotation shaft 30 is detected by the encoder 90, and the detected signal is input to the controller. The source 1 is controlled to move to the correct position by automatic control or manual operation of the controller according to this signal.

Then, when an emergency such as a power failure occurs when the source 1 moves to the irradiation position and the radiation is being irradiated, the plunger 85 of the air cylinder 84 is extended by the normal cylinder driving circuit, and accordingly the shielding plate ( 82 is lowered to close the exit of the collimator 60.

The source container 1 of the source rotation rotation is accommodated in a variety of sources (1) can be irradiated with radiation from the required source (1) by adjusting the rotation angle of the rotation shaft 30 by the servo motor 41, The collimator 60 is also provided with a variety of types to work as necessary to replace.

As described above, the multi-line radiation device is installed so that the rotating shaft is rotated by a driving means such as a servo motor in the driving unit box, and the shielding container for rotation of the source provided with a plurality of source insertion portions of the rotating shaft is fixed and driven. It is installed to rotate inside the shield box coupled to the front of the box, the collimator is detachably coupled to the insertion groove of the shield box, a plurality of source storage containers in which the source is accommodated in the source insertion portion of the shield container for rotation of the source Is detachably coupled, and a shielding means for opening and closing the outlet of the collimator is installed at the front portion of the shielding box to completely block external leakage of radiation emitted from the source, as well as to irradiate each source. Semi-permanently without error Can be investigated by maintaining the correct dose has the advantage that you can accurately and consistently perform the calibration of the dosimeter.

Claims (5)

Rectangle drive box 10, the rotary shaft 30 that is rotatably installed in the longitudinal direction inside the drive box 10, the drive means 40 for driving the rotary shaft 30, and the rotary shaft 30 Lead 52 is filled in the cylindrical housing 51 which is fixed to the front end of the housing and is rotatably installed, and a reference position mark 53 is formed on the front surface of the housing 51, and a plurality of source insertion parts ( 54 is a source container rotation shielding container 50 formed concentrically with the reference position mark 53 to a predetermined depth of the lead 52, and coupled to the front portion of the drive box 10 is a source container rotation shield ( A shielding box 20 is rotatably installed inside and a lead box 22 filled with a lead 22 around the shielding container 50 for source rotation in the outer shell 21, and an outer shell of the shielding box 20. Removably coupled to the insertion groove 23 formed through the lead 22 in 21 The collimator 60, the source storage container 70 is accommodated and detachably coupled to the source insertion portion 54 of the shield container 50 for rotation of the source, and the shield box 20 The multi-ray radiation apparatus comprising a shielding means (80) installed in the front portion to open and close the outlet of the collimator (60). The source storage container (70) of claim 1, wherein the disc (73) is welded to the open end of the cylinder (71) and the lead (72) is filled therein, and the lead (72) at the center of the disc (73). Multi-source radiation irradiation apparatus, characterized in that the source receiving groove 74 is formed to a predetermined depth of. According to claim 1, The shielding means 80 is a guide 81 is fixed to the front of the shielding box 20, the shielding plate 82 filled with lead (82b) inside the outer shell (82a) is The air cylinder 84 is coupled to the inside of the guide 81 so as to be lifted and lowered, and is fixed to the support bar 83 fixed to the upper surface of the shielding box 20, and the plunger 85 of the air cylinder 84 is Multi-ray radiation apparatus characterized in that the fixed to the upper end of the shielding plate 82 is configured. According to claim 1, wherein the drive means (40) is a servo motor (41), the multi-ray radiation apparatus characterized in that the encoder (90) is installed on one side of the rotating shaft (30). According to claim 2, wherein the source storage container 70 accommodated in the source 1 is inserted into the source insertion portion 54 of the shield container 50 for rotation of the source and the peripheral portion of the source storage container 70 is the housing 51 Multi-source radiation irradiation device characterized in that the bolt is fastened to the fastening portion 55 formed in the peripheral portion of the source insertion portion (54).

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