CN216748109U

CN216748109U - Automatic beam intensity detection device of linear electron accelerator

Info

Publication number: CN216748109U
Application number: CN202220248963.3U
Authority: CN
Inventors: 周国梁; 唐娜; 肖海滨; 王仕忠; 陈光荣
Original assignee: Shandong Vanform High Energy Physics Technology Co ltd
Current assignee: Shandong Vanform High Energy Physics Technology Co ltd
Priority date: 2022-02-07
Filing date: 2022-02-07
Publication date: 2022-06-14
Anticipated expiration: 2032-02-07

Abstract

The utility model discloses a beam intensity automatic detection device of a linear electron accelerator, relating to the technical field of industrial linear electron accelerators; the method is characterized in that: the device comprises a power unit, a motion unit and a test unit, wherein a motor support frame is fixed on the top surface of a conveying curve close to a radiation area, a winch is connected with a self-locking motor, one end of a steel wire rope is bound with the winch, and the other end of the steel wire rope is bound with a traction ring of a movable tray; the supporting frame is fixed in a slope shape with a high left and a low right, rollers are arranged at four corners of the bottom surface of the movable tray, an insulating bottom plate is laid in the groove, the water absorber is in a rectangular stainless steel groove structure and is placed above the groove of the movable tray, and a testing bolt is arranged on the frame and is used for connecting one end of a measuring cable; the utility model has the advantages that: avoid artifical transport and pass in and out the irradiation passageway repeatedly, only be used for the measurement of goods absorbed dose and simple structure, remote control accomplishes in the control room of keeping away from the radiation zone to the intensity parameter of the more convenient acquisition beam.

Description

Automatic beam intensity detection device of linear electron accelerator

Technical Field

The utility model relates to the technical field of industrial linear electron accelerators, in particular to a beam technology.

Background

The linear electron accelerator accelerates electrons by using a high-frequency electric field, electron beams excited by an electron source continuously acquire energy in an accelerating tube and accelerate, the energy of the electron beams of the linear electron accelerator for industrial irradiation sterilization usually reaches 10MeV, the electron beams with enough energy are emitted from a scanning box at the tail end of the accelerating tube and are used for cargo treatment, and an outlet of the scanning box is called an irradiation window and is covered with a titanium film to maintain the vacuum state in the accelerating tube. The operation main control console of the electron accelerator is positioned in a main control room far away from the radiation area; the goods transmission channel is of a curve type, aims to prevent ray leakage, and is provided with an inlet and an outlet, and is used for conveying a beam lower line of goods to be irradiated to detour to the deepest area through three curves to be irradiated by electron beams. The electron beam has two important parameters, except the electron energy, the other is the beam intensity, which is the time average value of the number of the electron beam irradiated on a product, and the unit is milliampere, and the index directly influences the irradiation dose size absorbed by high-energy electrons in an irradiated substance, namely the irradiation processing capacity size in unit time. The beam intensity can be measured by collecting electrons of the titanium film within a certain time, so that the irradiation dose actually acting on goods can be calculated.

Due to the complexity of the operation and maintenance of accelerator equipment, re-debugging is often required, and in order to ensure strict compliance with the preset irradiation dose, parameters such as beam intensity and the like are often required to be tested. The existing testing devices are mostly simple water tank type absorption devices, are temporarily and manually carried to the lower part of a scanning box in a transmission channel, and are heavy and inconvenient; the utility model with the comparison application number of 202011396002.9 discloses an electron accelerator irradiation intensity detection device which is suitable for measuring beam intensity differences of a plurality of parts, so that the performance of equipment is comprehensively judged, the structure is relatively complex, and a structure convenient to move is not arranged.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide an automatic beam intensity detection device of a linear electron accelerator, which avoids manual carrying and repeated access of an irradiation channel, is only used for measuring the absorbed dose of goods, has a simple structure, and is remotely controlled and completed in an operation room far away from a radiation area, so that the intensity parameters of the beam can be more conveniently obtained.

In order to achieve the above object, the present invention provides an automatic beam intensity detection device for a linear electron accelerator, comprising: comprises a power unit, a motion unit and a test unit; the power unit comprises an electric cabinet, a self-locking motor 1, a winch 9 and a motor support frame 2; the self-locking motor 1 is arranged on the motor support frame 2, the motor support frame 2 is fixed on the top surface of the conveying curve close to a radiation area so as to be prevented from being damaged by direct irradiation, the winch 9 is connected with the self-locking motor 1, one end of the steel wire rope 5 is bound with the winch 9, and the other end of the steel wire rope is bound with the traction ring 11 of the movable tray 7; the motion unit comprises a support frame 12, a movable tray 7 and an insulating bottom plate 14; the supporting frame 12 is fixed in a slope shape with a high left and a low right, so that the movable tray 7 automatically slides to the right when the steel wire rope 5 is released; the movable tray 7 is formed by welding angle steel into a rectangular groove, the middle part of a long frame on the left side is provided with a traction ring 11 which is connected with a steel wire rope 5, four corners of the bottom surface of the movable tray 7 are provided with rollers 15, and an insulating bottom plate 14 is laid in the groove of the movable tray 7 and is used for insulating the movable tray 7 and the water absorber 6; the test unit comprises a water absorber 6, a measuring cable and an ammeter; the water absorber 6 is a rectangular stainless steel groove structure, a certain amount of water is contained in the water absorber, and the water absorber is placed on the groove of the movable tray 7 and used for absorbing electrons emitted by the electron accelerator; the bolt 18 for testing is installed on the frame of the water absorber 6 and is used for connecting one end of a measuring cable, the other end of the measuring cable is connected with an ammeter and a ground wire, and the ammeter is placed in a main control room.

The power unit and the electric cabinet are arranged in a main control room, the electric cabinet comprises a control key and a control logic circuit, and the self-locking motor 1 is controlled to rotate or stop to enable the movable tray 7 to reciprocate; a plurality of lifting rings 10 are arranged on the top surface of the conveying channel and in the middle of the frame of the supporting frame 12 at intervals and pass through the guide steel wire rope 5; a stroke baffle disc 4 is bound at one position of the steel wire rope 5, a stroke switch 3 is arranged on the wall surface at the corresponding position, the stroke baffle disc 4 touches the stroke switch 3, then the self-locking motor 1 stops rotating, at the moment, the movable tray 7 moves to the left end of the supporting frame 12, the water absorber 6 does not absorb electron beams any more, and the accelerator can perform other work.

The moving unit and the supporting frame 12 are U-shaped steel welded into a square frame, the U-shaped parts of the front side frame and the rear side frame face upwards to form a guide rail, a stop block 8 is arranged at the right end of the guide rail, and the stop block 8 can enable the moving tray 7 to stop at a working position under the scanning box when sliding from left to right along the guide rail.

In the test unit, the water absorber 6 is provided with a ball float valve 13, an overflow opening 16 and a water outlet 17, a shielding cover 19 is arranged above the ball float valve 13 to prevent the water replenishing device from being damaged by rays, if the water absorbs electronic energy and boils, the water flows out through the overflow opening 16, the ball float valve 13 replenishes water evaporated due to high temperature, and after the test is finished, the water outlet 17 is opened to enable the water to automatically flow out.

The utility model has the advantages that: the automatic beam intensity detection device of the linear electron accelerator is simple in structure, can be used for measuring the absorbed dose of cargos only, and can be remotely controlled in an operation room far away from a radiation area, so that beam intensity parameters can be obtained more conveniently.

Drawings

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

fig. 1 is a plan view and a plan view of an automatic beam intensity detection apparatus;

FIG. 2 is a left and top view of the water absorber, mobile tray, support frame;

in the drawings: 1. a self-locking motor; 2. a motor support frame; 3. a travel switch; 4. a travel stop disc; 5. a wire rope; 6. a water absorber; 7. moving the tray; 8. a stopper; 9. a winch; 10. a hoisting ring; 11. a traction ring; 12. a support frame; 13. a float valve; 14. an insulating base plate; 15. a roller; 16. an overflow port; 17. a water outlet; 18. testing bolts; 19. a shield can.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the following structure of the present invention is further described in detail with reference to the accompanying drawings.

The automatic beam intensity detection device of the linear electron accelerator comprises a power unit, a motion unit and a test unit; the power unit comprises an electric cabinet, a self-locking motor 1, a winch 9 and a motor support frame 2; the self-locking motor 1 is arranged on the motor support frame 2, the motor support frame 2 is fixed on the top surface of a conveying curve close to a radiation area, the winch 9 is connected with the self-locking motor 1, one end of the steel wire rope 5 is bound with the winch 9, and the other end of the steel wire rope is bound with the traction ring 11 of the movable tray 7; the motion unit comprises a support frame 12, a movable tray 7 and an insulating bottom plate 14; the supporting frame 12 is fixed in a slope shape with a high left and a low right, so that the movable tray 7 automatically slides rightwards when the steel wire rope 5 is released; the movable tray 7 is formed by welding angle steel into a rectangular groove, the middle part of a long frame on the left side is provided with a traction ring 11 which is connected with a steel wire rope 5, four corners of the bottom surface of the movable tray 7 are provided with rollers 15, and an insulating bottom plate 14 is laid in the groove of the movable tray 7 and is used for insulating the movable tray 7 and the water absorber 6; the test unit comprises a water absorber 6, a measuring cable and an ammeter; the water absorber 6 is a rectangular stainless steel groove structure, and a certain amount of water is contained in the water absorber for absorbing electrons emitted by the electron accelerator; the bolt 18 for testing is installed on the frame of the water absorber 6 and is used for connecting one end of a measuring cable, the other end of the measuring cable is connected with an ammeter and a ground wire, and the ammeter is placed in a main control room.

The power unit and the electric cabinet are arranged in a main control room, the electric cabinet comprises a control key and a control logic circuit, and the self-locking motor 1 is controlled to rotate or stop to enable the movable tray 7 to reciprocate; a plurality of lifting rings 10 are arranged on the top surface of the conveying channel and in the middle of the frame of the supporting frame 12 at intervals and pass through the guide steel wire rope 5; a stroke stop disc 4 is bound at one position of the steel wire rope 5, a stroke switch 3 is arranged on the wall surface at the corresponding position, and the stroke stop disc 4 stops rotating when touching the stroke switch 3 and the self-locking motor 1.

The above detailed description is only used to illustrate the technical solution of the present invention, and not to limit 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.

Claims

1. The automatic detection device for the beam intensity of the linear electron accelerator is characterized in that: comprises a power unit, a motion unit and a test unit; the power unit comprises an electric cabinet, a self-locking motor (1), a winch (9) and a motor support frame (2); the self-locking motor (1) is arranged on the motor support frame (2), the motor support frame (2) is fixed on the top surface of the conveying curve close to the radiation area, the winch (9) is connected with the self-locking motor (1), one end of the steel wire rope (5) is bound with the winch (9), and the other end of the steel wire rope is bound with the traction ring (11) of the movable tray (7); the motion unit comprises a support frame (12), a movable tray (7) and an insulating bottom plate (14); the supporting frame (12) is fixed in a slope shape with a high left and a low right, the movable tray (7) is welded into a rectangular groove by angle steel, the middle part of the left long frame is provided with a traction ring (11), four corners of the bottom surface of the movable tray (7) are provided with rollers (15), and an insulating bottom plate (14) is laid in the groove of the movable tray (7); the test unit comprises a water absorber (6), a measuring cable and an ammeter; the water absorber (6) is of a rectangular stainless steel groove structure, a certain amount of water is filled in the water absorber, and the water absorber is placed on the groove of the movable tray (7); the bolt (18) for the installation test of the frame of the water absorber (6) is used for connecting one end of a measuring cable, the other end of the measuring cable is connected with an ammeter and a ground wire, and the ammeter is placed in a main control room.

2. The device for automatically detecting the beam intensity of a linear electron accelerator according to claim 1, wherein: the power unit and the electric cabinet are placed in a main control room, the electric cabinet comprises a control key and a control logic circuit, and the self-locking motor (1) is controlled to rotate or stop to enable the movable tray (7) to reciprocate; a plurality of lifting rings (10) are arranged on the top surface of the conveying channel and in the middle of the frame of the supporting frame (12) at intervals and pass through the guide steel wire rope (5); a stroke stop disc (4) is bound at one position of the steel wire rope (5), a stroke switch (3) is arranged on the wall surface at the corresponding position, and the stroke stop disc (4) touches the stroke switch (3) to stop rotating the self-locking motor (1).

3. The device for automatically detecting the beam intensity of a linear electron accelerator according to claim 1, wherein: the moving unit and the supporting frame (12) are U-shaped steel welded into a square frame, the U-shaped parts of the front side frame and the rear side frame form a guide rail upwards, a stop block (8) is installed at the right end of the near guide rail, and the stop block (8) can enable the moving tray (7) to stop at a working position under the scanning box when sliding from left to right along the guide rail.

4. The device for automatically detecting the beam intensity of a linear electron accelerator according to claim 1, wherein: the testing unit is characterized in that the water absorber (6) is provided with a ball float valve (13), an overflow port (16) and a water outlet (17), and a shielding cover (19) is arranged above the ball float valve (13).