阅读说明：本技术 一种工业电子加速器用的束流挡板 (Beam flow baffle for industrial electronic accelerator ) 是由 张强 刘华周 刘洋 王琳 李传南 于 2020-10-12 设计创作，主要内容包括：本发明公开了一种工业电子加速器用的束流挡板,涉及电子束流屏蔽技术；其特征在于：包括：动力部件、运动部件、水吸收体、滑道部件共四个部分；动力部件包括电控箱、变频减速电机、扭力限制器,通过行程控制的链条限定水吸收体在滑道内平移,滑道部件固定在辐照室顶面；本发明的有益效果是：适用于扫描盒的最低位置位于加速管扫描盒通道内的,解决了没有邻近的侧墙可用于固定的问题,延长电气部件使用寿命,多重电机保护、限位保护提高了使用安全性,水吸收体的双侧支撑,更有利于稳定平滑,对于电子加速器的安全运行更有保障。(The invention discloses a beam baffle for an industrial electron accelerator, and relates to an electron beam shielding technology; the method is characterized in that: the method comprises the following steps: the power part, the moving part, the water absorber and the slideway part are all four parts; the power part comprises an electric cabinet, a variable-frequency speed reducing motor and a torque limiter, the water absorber is limited by a stroke-controlled chain to move horizontally in a slideway, and the slideway part is fixed on the top surface of the irradiation chamber; the invention has the beneficial effects that: the lowest position suitable for the scanning box is located in the channel of the accelerating tube scanning box, the problem that no adjacent side wall can be used for fixing is solved, the service life of an electrical component is prolonged, the use safety is improved through multiple motor protection and limiting protection, the water absorber is supported on two sides, stability and smoothness are facilitated, and the safe operation of the electron accelerator is guaranteed.)

1. A beam baffle for an industrial electron accelerator is characterized in that: comprises four parts of a power part, a moving part, a water absorber (13) and a slideway part; the power component comprises an electric cabinet and a variable-frequency speed reducing motor (1), and power is transmitted to a chain (7) of the moving component through a torque limiter (3); the moving part comprises a chain (7) which drives a stroke contact block (8) to move along a guide rod (9), and two stroke switches (6) are arranged; the slide way component is provided with a slide way (12) comprising a square frame structure, the slide way is fixed on the top surface of the irradiation chamber, the inner side surfaces of a pair of frames are provided with groove slide ways, water absorbers (13) are embedded, a transmission shaft (17) is arranged in one frame, a chain (7) is suspended between the variable-frequency speed reducing motor (1) and the transmission shaft (17), and the water absorbers (13) are connected through load chains (15) on two sides.

2. The beam stop for an industrial electron accelerator of claim 1, wherein: the power component comprises an electric cabinet, a variable-frequency speed reducing motor (1), a motor support frame (2), a torque limiter (3), a chain wheel (4) and a tensioning bolt (5); the electric cabinet is internally provided with a frequency converter and a control circuit; the variable-frequency speed reducing motor (1) is arranged on the motor support frame (2); the motor support frame (2) is fixed on the top surface of the irradiation chamber and is made of stainless steel material, and a lead plate is attached to the inner surface of the motor support frame; the torque limiter (3) is made of stainless steel materials and is assembled with an output shaft of the variable-frequency speed reducing motor (1); the tensioning bolt (5) is fixed on the motor support frame (2), and the tail end of the tensioning bolt is connected with the chain wheel (4).

3. The beam stop for an industrial electron accelerator of claim 1, wherein: the moving part comprises a travel switch (6), a chain (7), a travel contact block (8), a guide rod (9) and a travel switch protective cover (10); the number of the travel switches (6) is 2, the travel switches are arranged in a travel switch protective cover (10) and are electrically connected with the electric cabinet; the stroke contact block (8) is arranged on the chain (7) and does linear reciprocating motion along the guide rod (9), and the stroke contact block and the water absorber (13) have synchronous displacement; the guide rod (9) is arranged inside the travel switch protective cover (10); the travel switch protective cover (10) is arranged on the top surface of the irradiation chamber and is made of stainless steel with a lead plate inside.

4. The beam stop for an industrial electron accelerator of claim 1, wherein: the water absorber (13) is of a rectangular stainless steel structure, a circulating water pipeline is arranged inside the water absorber, pulleys are arranged at two ends of the water absorber, and U-shaped clamps are arranged at two ends of the water absorber and are in threaded connection with the load chain (15).

5. The beam stop for an industrial electron accelerator of claim 1, wherein: the slide way component comprises a limit screw (11), a slide way (12), an auxiliary shaft (14), a load chain (15), a driven chain wheel (16) and a transmission shaft (17); the number of the limiting screws (11) is 4, and the limiting screws are arranged at two ends of the slide way (12); two driven chain wheels (16) are fixed at two ends of a transmission shaft (17); an auxiliary shaft (14) is fixedly arranged at the right end of each of the two side slideways (12), and a load chain (15) is hung between the driven chain wheel (16) and the auxiliary shaft (14) and is connected with the water absorber (13).

Technical Field

The invention relates to an industrial electron accelerator technology, in particular to an electron beam shielding technology.

Background

The irradiation processing by the electron beam generated by the industrial electron accelerator becomes an important process means in the industries of chemical engineering, electric power, agricultural and sideline products, environmental protection and the like. In the irradiation operation process, the irradiation dose is frequently required to be changed for different cargos, and the beam current is required to be shielded for a short time in the adjustment process; if faults such as shutdown, cargo blockage and the like occur in the operation process of the transmission line, beam current needs to be immediately shielded in order to prevent damage, heating and even fire caused by excessive irradiation of the cargo; when the accelerator is maintained and debugged, the transmission line stops running and needs to be shielded to prevent the transmission line from being damaged. Therefore, the beam shielding device has important practicability, and in view of the diversity of the structure of the irradiation chamber, the beam shielding device also has different structural designs so as to be convenient to install and use. The invention with the application number of 2019107437642 discloses a beam shielding device for an industrial electron accelerator, which realizes the beam shielding function, but has several defects that firstly, the device can be only fixed on a side wall, and the device is not suitable for a scanning box without an adjacent side wall; secondly, the electric fittings are positioned in a beam direct radiation area, and the reliability of the electric fittings is reduced by long-term radiation although the electric fittings are provided with protective devices; thirdly, only one end of the water absorber is provided with a support, so that the stability is low. The invention with the application number of 201710439026X discloses a beam baffle device of a swing type accelerator, the supporting point of the beam baffle device is fixed on a scanning box to reciprocate, and the beam baffle device is unsafe for the scanning box with titanium film which is easy to damage and causes vacuum leakage.

At present, a host system of the industrial electronic accelerator is installed in an upper-layer machine room, a transmission line is installed in a lower-layer irradiation room, a floor slab between two layers is thickened concrete, an accelerating tube scanning box channel is arranged, the lower end of an accelerating tube is connected with a scanning box, and goods on the transmission line are irradiated through the channel. The lowest position of the scanning box is provided with one extending out of the channel and one positioned in the channel.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a beam baffle for an industrial electronic accelerator, which is accurate in positioning and stable in operation, is fixed on the top surface of an irradiation chamber and around the lower opening of a channel of an accelerating tube scanning box, is suitable for the lowest position of the scanning box in the channel of the accelerating tube scanning box, solves the problem that no adjacent side wall can be used for fixing, and prolongs the service life because an electrical component avoids a direct radiation area.

In order to achieve the above object, the technical solution of the present invention is a beam baffle for an industrial electron accelerator, comprising: the power part, the moving part, the water absorber 13 and the slideway part are all four parts; the power component comprises an electric cabinet and a variable-frequency speed reducing motor 1, and power is transmitted to a chain 7 of the moving component through a torque limiter 3; the moving part arrangement comprises a chain 7 driving a stroke contact block 8 to move along a guide rod 9, and two stroke switches 6 are arranged to limit the stroke range of the stroke contact block, so that the water absorber 13 is driven and limited to move horizontally; the slide way component is provided with a slide way 12 which comprises a square frame structure and is fixed on the top surface of the irradiation chamber, the inner side surfaces of a pair of frames are provided with groove slide ways, water absorbers 13 are embedded in the groove slide ways, a transmission shaft 17 is arranged in one frame, a chain 7 drives the transmission shaft 17 to rotate, and the water absorbers 13 are driven to move horizontally by load chains 15 on two sides.

The power component comprises an electric cabinet, a variable-frequency speed reducing motor 1, a motor support frame 2, a torque limiter 3, a chain wheel 4 and a tensioning bolt 5; the electric cabinet is internally provided with a frequency converter and a control circuit, the frequency converter controls the forward rotation, the reverse rotation or the stop of the variable-frequency speed reducing motor 1, and the control circuit receives the instruction of the main control console and the signal of the travel switch 6 and transmits the instruction and the signal to the frequency converter; the variable-frequency speed reducing motor 1 is arranged on the motor support frame 2 and is used for ensuring the rapid and accurate positioning of the water absorber 13; the motor support frame 2 is fixed on the top surface of the irradiation chamber and is made of stainless steel material, and a lead plate is attached to the inner surface of the motor support frame to play a role in shielding radiation and protecting a motor; the torque limiter 3 is made of stainless steel materials and assembled with the output shaft of the variable-frequency speed reducing motor 1, and if a chain is blocked, the motor can be prevented from being burnt; tensioning bolt 5 is fixed on motor support frame 2, and the terminal connection sprocket 4 realizes the tensioning regulatory function to chain 7.

The moving parts comprise a travel switch 6, a chain 7, a travel contact block 8, a guide rod 9 and a travel switch protective cover 10; the travel switches 6 are 2 in number, are arranged in the travel switch protective cover 10 and are used for determining position signals of a starting point and an end point of the water absorber 13 and controlling the travel of the water absorber; the chain 7 drives the action of the torque limiter 3 to drive the transmission shaft 17 to rotate; the stroke contact block 8 is arranged on the chain 7 and linearly reciprocates along the guide rod 9, and has synchronous displacement with the water absorber 13; the guide rod 9 is arranged inside the travel switch protective cover 10; the travel switch protective cover 10 is installed on the top surface of the irradiation chamber and is made of stainless steel with lead plates attached inside.

The water absorber 13 is of a rectangular stainless steel structure, a circulating water pipeline is arranged in the water absorber, pulleys are arranged at two ends of the water absorber and can roll in the slideway 12, U-shaped clamps are further arranged at two ends of the water absorber and are in threaded connection with the load chain 15, and the tension of the load chain 15 can be controlled by adjusting the length of the stud; when the water absorber 13 is positioned at the side, the accelerator is normally irradiated and processed, and when the water absorber moves to the center of the channel of the accelerating tube scanning box, the electron ray is blocked and the energy of the electron beam is absorbed.

The slide way component comprises a limit screw 11, a slide way 12, an auxiliary shaft 14, a load chain 15, a driven chain wheel 16 and a transmission shaft 17; the number of the limiting screws 11 is 4, the limiting screws are arranged at two ends of the slide way 12, and the limitation on the stroke of the water absorber 13 is strengthened; the two driven chain wheels 16 are fixed at two ends of the transmission shaft 17, and when the transmission shaft 17 rotates, the driven chain wheels 16 rotate along with the transmission shaft; an auxiliary shaft 14 is fixedly arranged at the right end of each of the two side slideways 12, and a load chain 15 is hung between a driven chain wheel 16 and the auxiliary shaft 14 and is connected with a water absorber 13.

The invention has the beneficial effects that: the beam baffle can be fixed on the top surface of the irradiation chamber and around the lower opening of the channel of the accelerating tube scanning box, the lowest position of the scanning box is suitable for being positioned in the channel of the accelerating tube scanning box, the problem that no adjacent side wall can be used for fixing is solved, and the electric parts avoid a direct radiation area, so that the service life can be prolonged; the use safety is improved by multiple motor protection and limit protection; the bilateral support of the water absorber is more beneficial to stability and smoothness, and the safe operation of the electron accelerator is guaranteed.

Drawings

The technical scheme of the invention is further explained in detail by combining the attached drawings and the detailed implementation mode;

FIG. 1: a beam baffle front view for an industrial electron accelerator;

FIG. 2 is a drawing: a top view of a beam baffle for an industrial electron accelerator;

in the figure: 1. a variable frequency reduction motor; 2. a motor support frame; 3. a torque limiter; 4. a sprocket; 5. tensioning the bolt; 6. a travel switch; 7. a chain; 8. a travel contact block; 9. a guide bar; 10. a travel switch protective cover; 11. a limit screw; 12. a slideway; 13. a water absorber; 14. an auxiliary shaft; 15. a load chain; 16. a driven sprocket; 17. a drive shaft.

Detailed Description

The installation of a beam baffle for an industrial electron accelerator comprises the following steps: assembling and fixing a variable-frequency speed reducing motor 1, a torque limiter 3, a chain wheel 4 and a tension bolt 5 on a motor support frame 2; the travel switch 6 and the guide rod 9 are arranged inside a travel switch protective cover 10; mounting limit screws 11 at two ends of a slide way 12, respectively mounting an auxiliary shaft 14 and a transmission shaft 17 at two sides of the slide way 12, and respectively mounting a driven sprocket 16; embedding a water absorber 13 in the slideway 12; hanging the chain 7 on the torque limiter 3 and the transmission shaft 17; a load chain 15 is hung on the driven sprocket 16 and the auxiliary shaft 14, and is connected with the water absorber 13; the motor support frame 2, the travel switch protective cover 10 and the slide way 12 are hung on the top surface of the irradiation chamber through expansion screws; ensuring the levelness of each installation part in the installation process, wherein the inclination is less than 1 mm/m; and finally, the stroke contact block 8 is arranged on the chain 7, the stroke switch 6 is electrically connected with the electric cabinet and the accelerator main control console, and the position of the stroke contact block 8 is adjusted when the whole machine is linked, so that the stroke positioning of the water absorber 13 is controlled finally.

The using method comprises the following steps: connecting a cooling system to 2 flange openings of the water absorber 13 to realize water circulation cooling; the water absorber 13 is normally positioned at the side, the accelerator main control console sends a forward rotation instruction, the variable-frequency speed reduction motor 1 forwards rotates to drive the torque limiter 3 to drag the chain 7, the transmission shaft 17, the driven sprocket 16 and the load chain 15 are sequentially driven, the water absorber 13 is dragged to move rightwards, when the water absorber is horizontally moved to the center of the channel of the accelerating tube scanning box, the stroke contact block 8 touches the stroke switch 6 at the right side, and the water absorber 13 stops moving. After the corresponding work is finished, the main control console sends a reverse instruction, the water absorber 13 moves leftwards, the stroke touch block 8 touches the stroke switch 6 on the left side, the water absorber 13 stops on the side, and the accelerator continues irradiation processing.

The above detailed description is only for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.