Radioactive source fixing device

Abstract

The utility model discloses a radioactive source fixing device which comprises a containing device used for containing a radioactive source, the containing device comprises a rotating body, a connecting groove is formed in the side face of the rotating body, and a quick insertion structure connected with the radioactive source in a clamped mode is arranged in the connecting groove, so that the contact time of operators and the radioactive source is shortened, and the safety of the operators is improved. And the personal safety of operators is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of radioactive material experiments, in particular to a radioactive source fixing device. Background Art

[0002] Cesium 137 is a common radioactive cesium isotope with a half-life of about 30 years. It will gradually decay into radioactive barium and finally become a stable form of barium. This isotope has special applications in the medical field, such as treating cancer. In addition, cesium emits electrons under the action of light, so metallic cesium is mainly used in the manufacture of photoelectric tubes, spectrometers, scintillation counters, radio tubes, military infrared signal lamps, and various optical instruments and detection instruments.

[0003] When the radioactivity of cesium 137 is used for experiments or use, it is necessary to use the switch of the lead box to control the output direction of the radioactive particles, so that the output radioactive particles can be used for experiments or use. The lead box containing the radioactive source is bolted to a fixing device. Since it needs to be manually twisted, the operator is in contact with the radioactive source for too long, and there are certain operational risks in loading and changing materials. The present technical solution is now proposed for improvement. Utility Model Content

[0004] The utility model aims to provide a radioactive source fixing device to overcome the disadvantages of the prior art that cesium 137 is in contact with operators for a long time during loading and changing materials, which may cause human body harm.

[0005] The utility model is realized by the following technical scheme: a radioactive source fixing device, comprising a containing device for placing the radioactive source, the containing device comprising a rotating body, a connecting groove is arranged on the side of the rotating body, and a quick-insertion structure for clamping with the radioactive source is arranged inside the connecting groove.

[0006] Furthermore, the cross section of the rotating body is an eccentric shaft, the connecting groove is arranged on the side of the rotating body with a smaller radius, and the outer side of the rotating body is sleeved with an output device.

[0007] Furthermore, the quick-insertion structure comprises a receiving groove arranged on the inner wall of the connecting groove, and a spring sheet bent toward the axis of the connecting groove is arranged inside the receiving groove.

[0008] Furthermore, a protrusion for increasing friction is arranged on the upper part of the spring sheet.

[0009] Furthermore, a rotating shaft is provided at one end of the rotating body, and a radius of the rotating shaft is equal to a radius of a longer side of the rotating body.

[0010] Furthermore, the sum of the radius of the smaller side of the rotating body and the length of the radiation source protruding from the side wall of the rotating body is equal to the radius of the longer end of the rotating body.

[0011] The beneficial effects of the utility model are as follows: the cross section of the rotating body is an eccentric shaft, and the connecting groove is arranged on the side with a smaller radius of the rotating body. When in use, when the radiation source faces upward, the outlet and the radiation source form a through cavity for output use. When closed, the rotating body rotates 180 degrees, and the side with a larger radius of the rotating body turns to the outlet of the upper protective shell to form a sealing closure effect. The sealing effect is good and the protection is safe. A clamping column is fixed at the bottom of the lead box for placing cesium 137, and an arc groove clamped with the protrusion is arranged on the side of the clamping column. When placing the radiation source, it only needs to be manually pressed to the bottom of the connecting groove to fix it. When replacing, it only needs to be pulled upward to quickly complete the loading and replacement of materials. Compared with the existing screw connection, the operation time is greatly reduced, the contact time between the operator and the radiation source is reduced, and the personal safety of the operator is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 It is a side view structural schematic diagram of the utility model;

[0014] Figure 3 It is a cross-sectional structural schematic diagram of the utility model;

[0015] Figure 4 This is a schematic diagram of the structure of the utility model in use state;

[0016] Figure 5 This is a schematic diagram of the installation position structure of the utility model;

[0017] Wherein: 1. housing; 101. drive motor; 102. reducer; 103. bushing; 104. limit switch; 2. upper protective shell; 201. connecting plate; 202. lower protective shell; 3. rotating body; 301. limiting plate; 302. connecting groove; 303. rotating shaft; 304. spring; DETAILED DESCRIPTION

[0018] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] The following will be combined with the drawings in the utility model embodiments to clearly and completely describe the technical solutions in the utility model embodiments. Obviously, the described embodiments are only part of the utility model embodiments, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Example 1

[0021] like Figure 1-3 As shown: a radioactive source fixing device, including a containing device for placing a radioactive source, the containing device includes a rotating body, a connecting groove is arranged on the side of the rotating body, the cross section of the rotating body is an eccentric shaft, the connecting groove is arranged on the side of the rotating body with a smaller radius, and an output device is sleeved on the outer side of the rotating body. The main function of the output device is to protect the radioactive source and export the radioactive source when necessary, including an upper protective shell 2, a connecting plate 201 and a lower protective shell 202. An outlet is opened on the top of the upper protective shell 2 for exporting the radioactive source. The connecting plate 201 connects the upper protective shell 2 and the lower protective shell 202 to ensure the stability of the entire output device. The lower protective shell is designed to be a truncated cone with a downwardly protruding bottom. This design can not only better fix and protect the radiation source, but also reduce the shaking of the radiation source during the flipping process. In addition, a protective cover is also provided inside the lower protective shell 202 to further enhance the protection effect of the radiation source. The lower protective shell 202 can be removed. The radiation source is generally cesium 137. By placing it inside a lead box, the bottom of the lead box is bolted to the inside of the connecting groove 302 by bolts. When replacing or installing cesium 137, the lower protective shell 202 is removed. It is easy to use and simple to adjust, which greatly reduces the contact time between the operator and the cesium 137 during reciprocating operations, ensuring the operator's safety.

[0022] A rotating shaft 303 is provided at one end of the rotating body, and the radius of the rotating shaft 303 is equal to the radius of the longer side of the rotating body 3. The sum of the radius of the smaller side of the rotating body 3 and the length of the radiation source protruding from the side wall of the rotating body 3 is equal to the radius length of the longer end of the rotating body. When installing, the rotating body 3 is inserted into the upper protective shell 2, and the diameter of the mounting tube inside the upper protective shell 2 is equal to the larger radius of the rotating body. The rotating shaft is inserted into the mounting tube to maintain the stability of rotation during rotation. When in use, when the radiation source is facing upward, the outlet and the radiation source form a through cavity for output use. When closed, the rotating body rotates 180 degrees, and the side with the larger radius of the rotating body turns to the outlet of the upper protective shell to form a sealing closure effect, which has a good sealing effect and is safe for protection and use.

[0023] A quick-insertion structure that is engaged with the radiation source is arranged inside the connecting groove, and the quick-insertion structure includes a receiving groove arranged on the inner wall of the connecting groove, and a spring piece 304 bent toward the axis of the connecting groove is arranged inside the receiving groove, and a protrusion that increases friction is arranged on the upper part of the spring piece 304. A clamping column is fixed at the bottom of the lead box for placing cesium 137, and an arc groove that is engaged with the protrusion is arranged on the side of the clamping column. When placing the radiation source, it only needs to be manually pressed to the bottom of the connecting groove to fix it. When replacing, it only needs to be pulled upwards, so that loading and changing of materials can be completed quickly. Compared with the existing screw connection, the operation time is greatly reduced, the contact time between the operator and the radiation source is reduced, and the personal safety of the operator is ensured.

[0024] A driving device is connected to the driving end of the rotating body, and the driving device is mainly composed of a shell 1, a power source and a rotating device. The power source is a driving motor 101, which is fixed inside the shell 1 through a mounting frame to ensure the stable operation of the motor. The shell 1 provides stable support and protection for the entire device. The power source is arranged inside the shell 1. A reduction device is arranged at the output end of the driving motor 101. The reduction device is a planetary reducer 102. The main function of the reduction device is to reduce the output speed of the motor. The output of the reducer 102 makes the flipping action smoother, and also reduces energy consumption.

[0025] The output end of the reducer 102 is connected to a flip frame, which is connected to a containing device. The containing device is responsible for carrying and fixing the radiation source. The flip frame includes a sleeve 103 connected to the reducer 102. A notch is provided on the side wall of the sleeve 103. The notch is engaged with a limit plate 301 on the rotating body 3. When in use, the driving motor 101 drives the reducer 102 and the sleeve 103 to rotate, and the sleeve 103 drives the rotating body 3 to rotate. Limit switches 104 are installed on both sides of the rotation path of the limit plate 301. The rotation angle of the rotating body 3 is controlled by the limit switch 104, and the opening and closing of the radiation source are further controlled. The structural technology is mature and stable.

[0026] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A radiation source fixing device, characterized in that: The invention comprises a containing device for placing a radiation source, wherein the containing device comprises a rotating body, a connecting groove is arranged on the side of the rotating body, and a quick-insertion structure for clamping with the radiation source is arranged inside the connecting groove.

2. The radiation source fixing device according to claim 1, characterized in that: The cross section of the rotating body is an eccentric shaft, the connecting groove is arranged on the side of the rotating body with a smaller radius, and the outer side of the rotating body is sleeved with an output device.

3. The radiation source fixing device according to claim 1, characterized in that: The quick-insertion structure comprises a receiving groove arranged on the inner wall of the connecting groove, and a spring sheet bent toward the axis of the connecting groove is arranged inside the receiving groove.

4. The radiation source fixing device according to claim 3, characterized in that: A protrusion for increasing friction is arranged on the upper part of the spring sheet.

5. The radiation source fixing device according to claim 2, characterized in that: A rotating shaft is arranged at one end of the rotating body, and the radius of the rotating shaft is equal to the radius of the longer side of the rotating body.

6. The radiation source fixing device according to claim 1, characterized in that: The sum of the radius of the smaller side of the rotating body and the length of the radiation source protruding from the side wall of the rotating body is equal to the radius of the longer end of the rotating body.

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