CN2810601Y - Shield type electron beam radiation sterilization device - Google Patents

Abstract

The utility model relates to a shielded electron beam irradiation sterilization device, which relates to the application field of nuclear technology. An embodiment of the device of the utility model includes an electron beam radiator and an integrated shielding body composed of electron accelerators, drift tubes, titanium windows and other components. Its structural feature is that the electron beam radiator is installed at the top center of the integrated shield, and the side wall of the integrated shield is equipped with a closed protective door that can deliver and retrieve items, and the integrated shield is equipped with a supportable item tray. The tray is supported by a support rod connected to the bottom plane thereof, and the support rod hermetically extends beyond the bottom plane of the integrated shielding body and is connected with the transmission mechanism. Coolant is placed at the bottom of the integrated shielding body. Compared with the prior art, the device of the utility model omits the shielding building and transmission device occupying an area, makes the sterilization device miniaturized, has the characteristics of simple structure and equipment cost saving, and at the same time, the self-shielding structure also improves the radiation protection. safety performance.

Description

Shielded electron beam irradiation sterilization device

technical field

The utility model relates to the application field of nuclear technology, in particular to a shielded electron beam irradiation sterilization device.

Background technique

Electron beam irradiation sterilization technology is a treatment technology that uses the ionization ability and bremsstrahlung effect of electron beams to cause certain biological and physical effects on irradiated items, thereby performing sterilization and deworming or changing the physical properties of the items. The use of electron beams produced by electron accelerators to sterilize mail or small items is an important technology related to safety and anti-terrorism. In the prior art, the device used to sterilize mail or small items is shown in Figure 1. It is an electron beam (beta ray) that reaches a certain energy by an electron accelerator, so that the ray is produced under the action of a transverse alternating electric field or a magnetic field. Horizontal scanning movement. The conveying device sends the object to be scanned to the bottom of the electron beam and moves longitudinally. Separately controlling the scanning speed of the electron beam and the conveying speed of the scanned object can ensure that the total absorbed dose of each point in the scanned object reaches the dose required for sterilization, thereby completing the sterilization work. This form requires the construction of shielded buildings and the use of transmission devices, so it is difficult to miniaturize the device. At the same time, there are openings on the shielding wall for the transmission device to pass through, which destroys the integrity of the shielding structure, increases the difficulty of radiation protection, complicates the device, and increases the equipment cost.

Contents of the invention

In view of the above-mentioned problems in the prior art, the purpose of this utility model is to provide a shielded electron beam irradiation sterilization device. The device omits the shielding building and transmission device occupying an area, miniaturizes the sterilization device, has the characteristics of simple structure and equipment cost saving, and meanwhile, the self-shielding structure also improves the safety performance of radiation protection.

In order to achieve the above-mentioned purpose of the invention, the technical solution of the utility model is realized in two ways:

method one,

A shielded electron beam irradiation sterilization device includes an electron beam radiator and an integrated shielding body composed of electron accelerators, drift tubes, titanium windows and other components. Its structural features are that the electron beam radiator is installed at the top center of the integrated shield, a closed protective door that can deliver and retrieve items is installed on the side wall of the integrated shield, and there is a supportable item in the integrated shield. tray. The tray is supported by a support rod connected to the bottom plane thereof, and the support rod hermetically extends beyond the bottom plane of the integrated shielding body and is connected with the transmission mechanism. Coolant is placed at the bottom of the integrated shielding body.

In the above-mentioned sterilizing device, the transmission mechanism can adopt the transmission form of double bevel gears driven by the motor, or the transmission form of the worm driven by the motor, or the transmission form of the support rod directly driven by the synchronous motor.

Method two,

A shielded electron beam irradiation sterilization device includes an electron beam radiator and an integrated shielding body composed of electron accelerators, drift tubes, water-cooled double-layer titanium windows and other components. Its structural feature is that the electron beam radiator is installed at the top center of the integrated shield, and the side wall of the integrated shield is equipped with a closed protective door that can deliver and retrieve items, and the integrated shield is equipped with a supportable item tray. The tray is supported by a support rod connected to its bottom plane, and the support rod is fixed in the center of the bottom of the integrated shielding body. Coolant is placed at the bottom of the integrated shielding body.

Because the utility model adopts the above-mentioned technical scheme, the shielding building and the transmission device occupying an area are omitted, which is beneficial to the miniaturization of the sterilization device, saves the cost and simplifies the structure. In addition, the integrated shielding structure adopted also improves the safety performance of radiation protection. The device of the utility model can be installed on a car or a movable trolley, and becomes a vehicle-mounted mobile irradiation sterilization device, which can conveniently carry out disinfection and sterilization treatment for various users.

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is the structural representation of prior art device;

Fig. 2 is the structural representation of an embodiment of the utility model;

Fig. 3 is a schematic structural view of another embodiment of the present invention.

Detailed ways

Embodiment one,

Referring to Fig. 2, the utility model includes an electron beam radiator 1 and an integrated shielding body 2 composed of electron accelerators, drift tubes, titanium windows and other components. The electron beam radiator 1 is installed on the top center of the integrated shield 2, and the side wall of the integrated shield 2 is installed with a closed protective door 5 that can deliver and retrieve items, and the integrated shield 2 is equipped with a tray that can support the items 3. The tray 3 is supported by a support rod 6 connected to its bottom plane, and the support rod 6 extends hermetically beyond the bottom plane of the integrated shield 2 and is connected to the transmission mechanism 7 . The transmission mechanism 7 adopts the transmission form of double bevel gears driven by the motor. A cooling liquid 4 is placed at the bottom of the integrated shielding body 2 . Of course, if the transmission form in which the motor drives the worm screw and the worm gear is adopted, or the transmission form in which the support rod 6 is directly driven by the synchronous motor, it also belongs to the implementation form of the technical solution.

The method steps when this embodiment uses are:

① Open the protective door 5 and place the object to be scanned on the tray 3 inside the integrated shielding body 2 .

②Close the protective door 5, and the transmission mechanism 7 drives the support rod 6 to rotate, so that the transmission tray 3 is rotated. The electron beam emitted from the electron beam radiator 1 performs a transverse scanning movement under the action of an internal transverse alternating electric field or magnetic field, and this transverse scanning movement can be within the diameter range or radius range of the tray 3 .

③Respectively control the scanning speed of the electron beam and the rotation speed of the tray 3 to make the absorbed dose distribution of each point on the scanned object uniform. To control the scanning speed of the electron beam and the rotation speed of the tray, a manner of fast rotation of the tray and slow scanning speed or a fast scanning speed and slow rotation speed of the tray may be adopted.

④After the scanning and sterilization is completed, open the protective door 5, replace the next object to be scanned, and repeat the above steps.

Embodiment two,

Referring to Fig. 3, the utility model includes an electron beam radiator 1 and an integrated shielding body 2 composed of electron accelerators, drift tubes, water-cooled double-layer titanium windows and other components. The electron beam radiator 1 is installed on the top center of the integrated shield 2, and the side wall of the integrated shield 2 is installed with a closed protective door 5 that can deliver and retrieve items, and the integrated shield 2 is equipped with a tray that can support the items 3. The tray 3 is supported by a support rod 6 connected to its bottom plane, and the support rod 6 is fixed at the inner center of the bottom of the integrated shielding body 2 . A cooling liquid 4 is placed at the bottom of the integrated shielding body 2 . The water-cooled double-layer titanium window is set above the longitudinal linear gradient electric field or magnetic field. The water-cooled double-layer titanium window adopts water cooling in the middle.

The method steps when this embodiment uses are:

① Open the protective door 5 and place the object to be scanned on the tray 3 inside the integrated shielding body 2 .

② Close the protective door 5, and the electron beam radiator 1 emits an electron beam with an energy of 2.5MeV or 4.5MeV. Under the action of a transverse alternating electric field or magnetic field, the electron beam performs a horizontal scanning movement with a frequency of 0.18 Hz, and at the same time moves longitudinally at 33 cm/min under the action of a longitudinal linear gradient electric field or magnetic field. The electron beam can move vertically in steps, and the stepping period is half of the scanning period, that is, the electron beam is vertically stepped every time the transverse scanning movement is reversed.

③Respectively control the parameters of the two electric fields or magnetic fields to make the absorbed dose distribution of each point on the scanned object uniform.

④After the scanning and sterilization is completed, open the protective door 5, replace the next object to be scanned, and repeat the above steps.

Claims (3)

1. Shielded electron beam irradiation sterilization device, which includes an electron beam radiator (1) and an integrated shield (2) composed of electron accelerators, drift tubes, titanium windows and other components, characterized in that the electron beam The beam radiator (1) is installed on the top center of the integrated shield (2), the side wall of the integrated shield (2) is equipped with a closed protective door (5) that can send and take items, and the integrated shield (2) ) is equipped with a tray (3) that can support objects, and the tray (3) is supported by a support rod (6) connected to its bottom plane, and the support rod (6) is airtightly extended beyond the bottom plane of the integrated shield (2) and It is connected with the transmission mechanism (7), and the bottom of the integrated shielding body (2) is provided with cooling liquid (4). 2. The shielded electron beam irradiation sterilization device according to claim 1, characterized in that, the transmission mechanism (7) can adopt the transmission form of a double bevel gear driven by a motor, or a worm gear driven by a motor. The transmission form, or the transmission form in which the support rod (6) is directly driven by the synchronous motor. 3. A shielded electron beam irradiation sterilization device, which includes an electron beam radiator (1) and an integrated shielding body (2) composed of electron accelerators, drift tubes, water-cooled double-layer titanium windows and other components, characterized in that, The electron beam radiator (1) is installed on the top center of the integrated shield (2), and a closed protective door (5) that can send and take items is installed on the side wall of the integrated shield (2), and the integrated shield The body (2) is equipped with a tray (3) capable of supporting objects, the tray (3) is supported by a support rod (6) connected to its bottom plane, and the support rod (6) is fixed at the center of the bottom of the integrated shielding body (2) , a coolant (4) is placed at the bottom of the integrated shielding body (2).

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