阅读说明：本技术 一种电子帘加速器屏蔽体结构 (Shielding body structure of electron curtain accelerator ) 是由 杜芳琪 郑宏斌 黄芳芳 汤德芳 戚奇杰 曹得坡 杨皓 王辉 于 2019-10-17 设计创作，主要内容包括：本发明公开了一种电子帘加速器屏蔽体结构,属于工业辐照加工技术领域,包括连接电子帘加速器的电子流通道出口的屏蔽主体,屏蔽主体上活动连接有正对电子流通道出口处的主屏蔽块,以及对称分布在主屏蔽块的上下两侧的上屏蔽块和下屏蔽块；当主屏蔽块、上屏蔽块以及下屏蔽块活动至工作位时,三者与屏蔽主体形成供产品通过的产品通道,该产品通道经过电子流通道出口处。将屏蔽主体结构固定在电子帘加速器的电子流通道出口处,通过将主屏蔽块、上屏蔽块和下屏蔽块活动至工作位,可有效屏蔽电子帘加速器在电离时产生的辐射。(The invention discloses a shielding body structure of an electron curtain accelerator, belonging to the technical field of industrial irradiation processing, comprising a shielding main body connected with an electron flow channel outlet of the electron curtain accelerator, wherein the shielding main body is movably connected with a main shielding block which is over against the electron flow channel outlet, and an upper shielding block and a lower shielding block which are symmetrically distributed on the upper side and the lower side of the main shielding block; when the main shielding block, the upper shielding block and the lower shielding block move to the working position, the three and the shielding main body form a product channel for a product to pass through, and the product channel passes through the outlet of the electron flow channel. The shielding main body structure is fixed at the outlet of an electron flow channel of the electron curtain accelerator, and the radiation generated by the electron curtain accelerator during ionization can be effectively shielded by moving the main shielding block, the upper shielding block and the lower shielding block to a working position.)

1. A shielding body structure of an electron curtain accelerator is characterized by comprising a shielding main body connected with an electron flow channel outlet of the electron curtain accelerator, wherein the shielding main body is movably connected with a main shielding block right facing the electron flow channel outlet, and an upper shielding block and a lower shielding block which are symmetrically distributed on the upper side and the lower side of the main shielding block;

when the main shielding block, the upper shielding block and the lower shielding block move to a working position, the main shielding block, the upper shielding block and the lower shielding block form a product channel for a product to pass through, and the product channel passes through the outlet of the electron flow channel.

2. The shielding structure of an electronic curtain accelerator as claimed in claim 1, wherein the main shielding block, the upper shielding block and the lower shielding block are movably connected to the shielding body through a rotating shaft, and locking mechanisms are arranged at working positions of the main shielding block, the upper shielding block and the lower shielding block.

3. The electron curtain accelerator shield structure of claim 1, wherein rollers are disposed in the product channel for transporting the product.

4. The shielding structure of an electronic curtain accelerator as claimed in claim 3, wherein the upper shielding block and the lower shielding block are wedge-shaped, the movable ends of the upper shielding block and the lower shielding block are respectively provided with one roller, and two ends of the working position of the main shielding block are respectively provided with one roller.

5. The electron curtain accelerator shield structure of claim 4, wherein a synchromesh gear set is disposed between the upper shield block and the lower shield block.

6. The shielding structure of an electron curtain accelerator as claimed in claim 1, wherein the upper and lower ends of the working position of the main shielding block are provided with auxiliary shielding blocks.

7. The electron curtain accelerator shield structure of claim 1, wherein the shield body is provided with a nitrogen gas conduit communicating with the product channel.

8. The electron curtain accelerator shield structure of claim 1, wherein the main shield block has a beam dump integrated therein, and cooling water is introduced into the beam dump.

Technical Field

The invention relates to the technical field of industrial irradiation processing, in particular to a shielding body structure of an electron curtain accelerator.

Background

The electron accelerator is used for generating high-energy electron beam current by accelerating electrons in a high-voltage environment, and processing and optimizing the performance of an irradiated object by using the electron beam. Since electron beams are radioactive, this technique falls into the category of nuclear techniques. But the electron beam technology is different from natural radioactive nuclide, the generated electron beam mainly depends on the linkage of electric energy, the power failure stops immediately, and the safety and controllability are better. Therefore, shielding is one of the most critical factors in the production application of the electron accelerator, and a shielding device is arranged for the X-rays generated by the accelerator, so that the leakage radiation level of the X-rays meets the relevant national standard requirements.

In the medium and high energy electron accelerators, the medium and wide nuclear power reaches the limit of accelerator technology and has a certain market share, but the low energy electron curtain accelerator in the market is mainly imported, and no completely self-developed electron curtain accelerator is applied to the ground at home, so that the main equipment of the electron curtain accelerator is also innovative at home, and the shielding body specially designed for the characteristics of the electron curtain accelerator is one of the key research directions.

Chinese patent publication No. CN104505135A discloses a shielding device for an electron linear accelerator, which includes a target ray shield for shielding X rays generated by a target of the accelerator, a cylindrical outer shape in which a tip of the accelerator can be disposed, and a loose piece in which an X ray exit slit for emitting X rays from the accelerator is provided.

Chinese patent publication No. CN107293342A discloses a shielding structure of a linear accelerator, which has an inner wall surface defining a profile as viewed on a longitudinal axis, which substantially coincides with a profile of an accelerator guide.

Disclosure of Invention

The invention aims to provide a shielding body structure of an electron curtain accelerator, which can effectively shield radiation generated by ionization and ensure the radiation safety of field workers and workplaces.

In order to achieve the purpose, the shielding body structure of the electron curtain accelerator comprises a shielding main body connected with an electron flow channel outlet of the electron curtain accelerator, wherein a main shielding block right facing the electron flow channel outlet, an upper shielding block and a lower shielding block which are symmetrically distributed on the upper side and the lower side of the main shielding block are movably connected to the shielding main body; when the main shielding block, the upper shielding block and the lower shielding block move to the working position, the three and the shielding main body form a product channel for a product to pass through, and the product channel passes through the outlet of the electron flow channel.

Among the above-mentioned technical scheme, will shield the major structure and fix at the electron flow passageway exit of electron curtain accelerator, through shielding piece, last shielding piece and shielding piece activity down to the work position with the owner, can effectively shield the radiation that electron curtain accelerator produced when the ionization. And the whole device has simple structure and convenient operation.

In order to facilitate the movement of the main shielding block, the upper shielding block and the lower shielding block, the main shielding block, the upper shielding block and the lower shielding block are preferably movably connected with the shielding main body through rotating shafts, and locking mechanisms are arranged at the working positions of the main shielding block, the upper shielding block and the lower shielding block. When the device works, all the shielding blocks are manually rotated to working positions, and meanwhile, all the shielding blocks are locked by the locking mechanism, so that the dislocation phenomenon in the working process is prevented. The locking mechanism can be a screw, a pin, a buckle and the like.

In order to conveniently irradiate the irradiation product through the outlet of the electron flow channel of the electron curtain accelerator, preferably, a roller for conveying the product is arranged in the product channel.

Preferably, the upper shielding block and the lower shielding block are wedge-shaped, the movable ends of the upper shielding block and the lower shielding block are respectively provided with a roller, and two ends of the working position of the main shielding block are respectively provided with a roller. The rolling action of the four rollers can drive the product to pass through the outlet of the electron flow channel and irradiate.

In order to facilitate the rolling of the four rollers, a synchronous gear pair is preferably arranged between the upper shielding block and the lower shielding block. The synchronous gear pair is utilized to drive the rollers on the upper and lower shielding blocks to roll, and then the rollers at two ends of the working position of the main shielding block are driven to roll through the product conveying effect. The synchronous gear pair is utilized to realize that the upper shielding block and the lower shielding block are opened simultaneously, and the lower shielding block is turned upwards when being opened, so that the gravity problem cannot be turned, and the lower shielding block can be restrained by utilizing the downward gravity of the upper shielding block after being synchronous with the upper shielding block, so that the turning is realized.

In order to ensure that the product channel is more closed and the shielding effect is better, the upper end and the lower end of the working position of the main shielding block are preferably provided with the auxiliary shielding blocks.

Preferably, the shielding main body is provided with a nitrogen pipeline communicated with the product channel. The nitrogen can be introduced into the product channel to remove oxygen in the product channel, so that the irradiation product is prevented from being oxidized in the irradiation process, and the product quality is ensured.

Preferably, the main shielding block is integrated with a beam dump, and cooling water is introduced into the beam dump. The aluminum layer is sprayed on the receiving surface of the beam collector, the aluminum material has low density, the generation amount of bremsstrahlung under the bombardment of electron beams can be reduced, and the shielding requirement is lowered.

Compared with the prior art, the invention has the beneficial effects that:

the shielding body structure of the electron curtain accelerator is convenient to operate, can effectively shield radiation generated by ionization, and ensures the radiation safety of field workers and workplaces.

Drawings

FIG. 1 is a schematic diagram of an upper shield block, a lower shield block and a main shield block according to an embodiment of the present invention when they are opened;

FIG. 2 is a view of the structure of the orientation of an irradiated product according to an embodiment of the present invention;

fig. 3 is a side view of fig. 2.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described with reference to the following embodiments and accompanying drawings.