Electron accelerator with three-dimensional structure

Abstract

The invention discloses an electron accelerator with a three-dimensional structure in the field of electron accelerators, which comprises a high-voltage part, an accelerating tube part and a leading-out part, and is characterized in that the high-voltage part is composed of a secondary coil, a primary coil, an upper magnetic disc, a shielding layer, a conductive tube assembly, a coil supporting piece and a high-voltage electrode component; the accelerating tube part consists of an electron gun, an accelerating tube, an electron gun power supply and an electron gun power supply supporting component; the leading-out part is mainly composed of a focusing coil. The resonant transformation type high-voltage generator has the advantages of being compact in structure and high in efficiency, and then the three accelerating tubes are connected to the same high-voltage device in parallel, so that the accelerating tubes obtain high voltage to achieve particle acceleration. And meanwhile, each accelerating tube is independently provided with an electron gun power supply to control emission of particles, so that the three accelerating tubes can work independently and do not interfere with one another, and the reliability of equipment operation is greatly improved.

Description

Technical Field

[0001] The invention relates to the field of electron accelerators, in particular to an electron accelerator with a three-dimensional structure. Background Art

[0002] Electron irradiation accelerator applies the electric field generated by high voltage to the accelerator tube, and uses the accelerating effect of the electric field to accelerate the particles in it to a certain speed and then lead them out to achieve radiation processing of objects. Particles with a certain speed are called high-energy electron beams. High-energy electron beams have cross-linking, cracking, polymerization, and grafting effects on substances, thereby producing physical, chemical, and biological effects to achieve the purpose of application processing. This technology has been widely used in material modification, new material production, environmental protection, processing and production, sterilization and disinfection of medical and health products, and sterilization and preservation of food in industrial production.

[0003] An electron accelerator has a structure with multiple beam outlets. Some research has been done abroad in this regard. Their solution is to integrate three accelerator devices together, using a structure similar to the mountain shape, with each accelerating tube corresponding to a high-voltage device, and the accelerating tube outlets are all facing downward. Since this solution has three high-voltage devices inside, the problem of mutual coupling between high voltages is extremely difficult to solve and the reliability is low; in addition, the direction of the accelerating outlets is all downward, which makes the design of the beam structure more difficult, limiting the application scope of this accelerator; finally, since there are three high-voltage devices in one device, the structure is large and the economic benefits are low. Therefore, it is urgent to design an electron accelerator with multiple beam outlets that has a compact structure, high reliability, and a wide range of applications.

[0004] The existing electron accelerator adopts a single accelerating tube and a single beam extraction window design, which can only irradiate a single product per unit time and has the defect of low irradiation efficiency. Although there is a design of multiple beam extraction windows for a single accelerating device, it adopts a multiple accelerator integration method. The coupling problem between the high-voltage equipment corresponding to each accelerating tube is difficult to solve and the reliability is low. In addition, since the accelerating tube mouths are all facing downward, the beam structure design is difficult, which limits the scope of use. In addition, this type of equipment is large in size and high in cost, which also increases the economic burden of enterprises.

[0005] Therefore, those skilled in the art provide an electron accelerator with a three-dimensional structure to solve the problems raised in the above background technology. Summary of the invention

[0006] The object of the present invention is to provide an electron accelerator with a three-dimensional structure to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] An electron accelerator with a three-dimensional structure comprises a high-voltage part, an accelerating tube part and a lead-out part, wherein the high-voltage part is composed of a secondary coil, a primary coil, an upper magnetic disk, a shielding layer, a conductive tube assembly, a coil support and a high-voltage electrode component; the accelerating tube part is composed of an electron gun, an accelerating tube, an electron gun power supply and an electron gun power supply support component; the lead-out part is mainly composed of a focusing coil; the high-voltage part, the accelerating tube part and the lead-out part are integrated in a steel barrel composed of a base flange, a lower steel barrel component, an upper steel barrel component and a steel barrel top cover, wherein the lower steel barrel component is arranged above the base flange, the upper steel barrel component is arranged above the lower steel barrel component, and the steel barrel top cover is arranged above the upper steel barrel component.

[0009] As a further solution of the present invention: an electron gun power supply support is installed in the middle above the base flange, a grading ring support is installed in a position eccentrically above the base flange, and multiple layers of grading rings are arranged on the periphery of the grading ring support.

[0010] As a further solution of the present invention: an accelerating tube support for supporting the accelerating tube is arranged above the equalizing ring support, three cylinders for protecting the accelerating tube are arranged on the side wall of the lower steel barrel component, and the angle between the cylinders is 90 degrees, and a focusing coil is installed at the end of the cylinder outside the accelerating tube.

[0011] As a further solution of the present invention: an electron gun is installed above the electron gun power supply support, an electron gun power supply for power supply is arranged above the electron gun, and a high-voltage electrode component is arranged on one side of the electron gun.

[0012] As a further solution of the present invention: the high voltage part is placed inside the upper steel barrel component and is separated from the electron gun power supply and the lower magnetic disc. An L5 coil is installed above the lower magnetic disc. A plurality of secondary coils are stacked on the lower magnetic disc above the L5 coil, and the secondary coils and the L5 coils are connected to each other in pairs.

[0013] As a further solution of the present invention: the uppermost part of the secondary coil is covered with an upper magnetic disk, and the high-voltage part is supported as a whole by three coil support members at the bottom.

[0014] As a further solution of the present invention: a shielding layer is wrapped around the secondary coil, a wound primary coil is placed closely around the shielding layer, two ends of the primary coil are connected to the conductive tube assembly, and the outermost side of the primary coil is also wrapped with a magnetic conductor.

[0015] As a further solution of the present invention: the secondary coil and the primary coil have a resonant transformer type relationship, and the specific relationship is as follows:

[0016]

[0017] E2=4.44fW2φ m (2)

[0018]

[0019] In the formula: is the induced electromotive force of the primary winding; is the induced electromotive force of the secondary winding; is the number of turns of the primary winding; is the number of turns of the secondary winding; f is the power supply frequency of the circuit; k is the ratio of the primary and secondary winding turns; Φm is the magnetic flux generated by the primary coil.

[0020] As a further solution of the present invention: the base flange is connected to the lower steel barrel component by screws, the lower steel barrel component is connected to the upper steel barrel component by screws, and the upper steel barrel component is connected to the steel barrel top cover by screws.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention adopts a resonant transformer type as a high-voltage generator, which has the advantages of compact structure and high efficiency. After that, the three accelerating tubes are connected in parallel to the same high-voltage device, so that the accelerating tubes obtain high voltage to accelerate particles. At the same time, each accelerating tube is individually provided with an electron gun power supply to control the emission of particles, so that the three accelerating tubes can work independently without interfering with each other, which greatly improves the reliability of the equipment operation. The three accelerating tubes are connected in parallel and are uniformly powered by the same high-voltage generator, so that the equipment has a compact structure and a wide range of applications. Each accelerating tube is controlled by a separate electron gun power supply, and the three are independent of each other and can work independently without interfering with each other, which greatly improves the reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is the main figure of the present invention;

[0024] Figure 2 It is a top view of the present invention.

[0025] In the figure: 1. base flange, 2. lower steel barrel component, 3. focusing coil, 4. accelerating tube, 5. accelerating tube support, 6. upper steel barrel component, 7. secondary coil, 8. primary coil, 9. magnetic conductor, 10. upper magnetic disk, 11. steel barrel top cover, 12. shielding layer, 13. conductive tube assembly, 14. L5 coil, 15. lower magnetic disk, 16. electron gun power supply, 17. coil support, 18. electron gun power supply support component, 19. electron gun, 20. high-voltage electrode component, 21. equalizing ring, 22. equalizing ring support. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figures 1-2 In an embodiment of the present invention, an electron accelerator with a three-dimensional structure includes a high-voltage part, an accelerating tube 4 part and a lead-out part, wherein the high-voltage part is composed of a secondary coil 7, a primary coil 8, an upper magnetic disk 10, a shielding layer 12, a conductive tube assembly 13, a coil support 17 and a high-voltage electrode component 20; the accelerating tube 4 part is composed of an electron gun 19, an accelerating tube 4, an electron gun power supply 16 and an electron gun power supply support component 18; the lead-out part is mainly composed of a focusing coil 3; the high-voltage part, the accelerating tube 4 part and the lead-out part are integrated in a steel barrel composed of a base flange 1, a lower steel barrel component 2, an upper steel barrel component 6 and a steel barrel top cover 11, the lower steel barrel component 2 is arranged above the base flange 1, the upper steel barrel component 6 is arranged above the lower steel barrel component 2, and the steel barrel top cover 11 is arranged above the upper steel barrel component 6.

[0028] Among them, an electron gun power supply 16 support is installed in the middle above the base flange 1, and a voltage equalizing ring support 22 is installed at a position eccentric to the center above the base flange 1. Multiple layers of voltage equalizing rings 21 are arranged on the periphery of the voltage equalizing ring support 22.

[0029] Among them, an accelerating tube support 5 for supporting the accelerating tube 4 is arranged above the equalizing ring support 22, and three cylinders for protecting the accelerating tube 4 are arranged on the side wall of the lower steel barrel part 2, and the angle between the cylinders is 90 degrees. A focusing coil 3 is installed at the end of the cylinder outside the accelerating tube 4.

[0030] In the above technical solution, three accelerating tubes 4 are arranged in the same horizontal plane at 90° intervals, a focusing coil 3 is installed at the outlet of each accelerating tube 4 and an electron gun 19 is installed at the other end, an accelerating tube support 5 is arranged at the flange of the electron gun 19, so that the accelerating tube 4 can be supported in a horizontal manner, the electron gun power supply 16 of each accelerating tube 4 is placed under the lower magnetic disk 15 in a superimposed manner with three electron gun power supply support components 18 as the skeleton, and the shells of each electron gun power supply 16 are connected in parallel with each other, and then placed inside the high-voltage electrode component 20, and a voltage equalizing ring 21 connected in series and grounded is placed at the bottom of the electron gun power supply 16, and the voltage equalizing ring support 22 is used as its support frame so that the entire high-voltage part can be safely grounded and no electric field distortion is generated, so that the device structure is compact and has a wide range of applications, and each accelerating tube 4 adopts an independent working mode. Each accelerating tube 4 is controlled by a separate electron gun power supply 16, and the three are independent of each other and can work independently without affecting each other, which greatly improves the reliability of the device.

[0031] An electron gun 19 is installed above the support of the electron gun power supply 16 , an electron gun power supply 16 for power supply is arranged above the electron gun 19 , and a high-voltage electrode component 20 is arranged on one side of the electron gun 19 .

[0032] Among them, the high-voltage part is placed inside the upper steel barrel part 6, and is separated from the electron gun power supply 16 and the lower magnetic disk 15. An L5 coil 14 is installed above the lower magnetic disk 15. Several secondary coils 7 are stacked above the L5 coil 14 on the lower magnetic disk 15, and the secondary coils 7 and the L5 coils 14 are connected to each other.

[0033] By adopting the above technical solution, when the external medium frequency power supply supplies alternating current of a certain frequency to the conductive tube assembly 13, the primary coil 8 will excite the corresponding magnetic field under the action of the alternating current, so that the magnetic flux passing through the secondary coil 7 will change periodically. According to the principle of induced electromotive force, the corresponding alternating induced electromotive force will be generated inside the secondary coil 7. After the rectification action of the rectifier module inside each secondary coil 7 and the accumulation of several secondary coils 7, the corresponding high voltage will be generated, and the generated high voltage will eventually accumulate on the high-voltage electrode component 20.

[0034] The uppermost part of the secondary coil 7 is covered with an upper magnetic disk 10 , and the high-voltage part is supported as a whole by three coil support members 17 at the bottom.

[0035] The secondary coil 7 is wrapped with a shielding layer 12, and the wound primary coil 8 is placed closely around the shielding layer 12. Both ends of the primary coil 8 are connected to the conductive tube assembly 13, and the outermost side of the primary coil 8 is also wrapped with a magnetic conductor 9.

[0036] Among them, the relationship between the secondary coil 7 and the primary coil 8 belongs to a resonant transformer type relationship, and the specific relationship is as follows:

[0037]

[0038] E2=4.44fW2φ m (2)

[0039]

[0040] In the formula: is the induced electromotive force of the primary winding; is the induced electromotive force of the secondary winding; is the number of turns of the primary winding; is the number of turns of the secondary winding; f is the power supply frequency of the circuit; k is the ratio of the primary and secondary winding turns; Φm is the magnetic flux generated by the primary coil 8.

[0041] In the above formula, it can be known from formula (2) that in order to maximize the induced electromotive force on the secondary coil 77 while keeping other variables constant, the corresponding magnetic flux should also be maximized. The outer layer of the primary coil 8 is wrapped with a magnetic conductor 9 with magnetic conductivity, and is covered with an upper magnetic disk 10 and a lower magnetic disk 15 on the upper and lower sides, in order to minimize the leakage of magnetic flux and increase the effective magnetic flux passing through the secondary coil 7.

[0042] Among them, the base flange 1 is connected to the lower steel barrel component 2 by screws, the lower steel barrel component 2 is connected to the upper steel barrel component 6 by screws, and the upper steel barrel component 6 is connected to the steel barrel top cover 11 by screws.

[0043] The working principle of the present invention is: when the device needs to work, an external power supply supplies power to the accelerator so that the high-voltage part generates corresponding high voltage and accumulates on the high-voltage electrode component 2020. Since each electron gun power supply 1616 is respectively connected to each accelerating tube 44, the high voltage can be transmitted to each accelerating tube 4 in parallel using the shell of the electron gun power supply 1616 as a medium. The three electron gun power supplies 1616 are still connected in parallel with the L5 coil 1414 that supplies power to them. In this way, whether each electron gun power supply 1616 is working can be controlled to control whether each accelerating tube 4 emits a beam. Since the accelerating tube 44 and the high voltage, the electron gun power supply 1616 and the L5 coil 1414 are all connected in parallel, the three accelerating tubes 44 will not interfere with each other and can work independently. Finally, the high-energy electron beam drawn from each accelerating tube 44 is focused by the focusing coil 33 and then transmitted to the scanning structure behind until it reaches the product to be irradiated. The use of a resonant transformer type as a high-voltage generator has the advantages of compact structure and high efficiency. After that, the three accelerating tubes 4 are connected in parallel to the same high-voltage device, so that the accelerating tubes 4 obtain high voltage to accelerate particles. At the same time, each accelerating tube 4 is individually provided with an electron gun power supply 16 to control the emission of particles, so that the three accelerating tubes 4 can work independently without interfering with each other, which greatly improves the reliability of equipment operation.

[0044] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An electron accelerator with a three-dimensional structure, comprising a high voltage part, an accelerating tube (4) part and an extraction part, characterized in that: The high-voltage part is composed of a secondary coil (7), a primary coil (8), an upper magnetic disk (10), a shielding layer (12), a conductive tube assembly (13), a coil support (17) and a high-voltage electrode component (20); the accelerating tube (4) part is composed of an electron gun (19), an accelerating tube (4), an electron gun power supply (16) and an electron gun power supply support component (18); the lead-out part is mainly composed of a focusing coil (3); the high-voltage part, the accelerating tube (4) part and the lead-out part are integrated in a steel barrel composed of a base flange (1), a lower steel barrel component (2), an upper steel barrel component (6) and a steel barrel top cover (11); the lower steel barrel component (2) is arranged above the base flange (1), the upper steel barrel component (6) is arranged above the lower steel barrel component (2), and the steel barrel top cover (11) is arranged above the upper steel barrel component (6).

2. The electron accelerator with a three-dimensional structure according to claim 1, characterized in that: An electron gun power supply (16) support is installed in the middle of the base flange (1), a voltage equalizing ring support (22) is installed at a position eccentrically above the base flange (1), and multiple layers of voltage equalizing rings (21) are arranged around the periphery of the voltage equalizing ring support (22).

3. The electron accelerator with a three-dimensional structure according to claim 1, characterized in that: An accelerating tube support (5) for supporting the accelerating tube (4) is arranged above the pressure equalizing ring support (22); three cylinders for protecting the accelerating tube (4) are arranged on the side wall of the lower steel barrel component (2); and the angles between the cylinders are 90 degrees; and a focusing coil (3) is installed at the end of the cylinder outside the accelerating tube (4).

4. The electron accelerator with a three-dimensional structure according to claim 1, characterized in that: An electron gun (19) is installed above the electron gun power supply (16) support, an electron gun power supply (16) for supplying power is arranged above the electron gun (19), and a high-voltage electrode component (20) is arranged on one side of the electron gun (19).

5. The electron accelerator with a three-dimensional structure according to claim 4, characterized in that: The high-voltage part is placed inside the upper steel barrel component (6) and is separated from the electron gun power supply (16) and the lower magnetic disc (15). An L5 coil (14) is installed above the lower magnetic disc (15). A plurality of secondary coils (7) are stacked above the L5 coil (14) on the lower magnetic disc (15), and the secondary coils (7) and the L5 coils (14) are connected to each other in pairs.

6. The electron accelerator with a three-dimensional structure according to claim 5, characterized in that: The uppermost part of the secondary coil (7) is covered with an upper magnetic disc (10), and the high-voltage part is supported as a whole by three coil support members (17) at the bottom.

7. The electron accelerator with a three-dimensional structure according to claim 6, characterized in that: The secondary coil (7) is wrapped with a shielding layer (12), and a wound primary coil (8) is placed closely around the shielding layer (12). Both ends of the primary coil (8) are connected to a conductive tube assembly (13), and the outermost side of the primary coil (8) is also wrapped with a magnetic conductor (9).

8. The electron accelerator with a three-dimensional structure according to claim 1, characterized in that: The secondary coil (7) and the primary coil (8) have a resonant transformer type relationship, and the specific relationship is as follows: <h2 style=";text-align:left;direction:ltr">E2 = 4.44fW2φ<h2 style=";text-align:left;direction:ltr"> m <h2 style=";text-align:left;direction:ltr"> (2) Where: is the induced electromotive force of the primary winding; is the induced electromotive force of the secondary winding; is the number of turns of the primary winding; is the number of turns of the secondary winding; f is the power supply frequency of the circuit; k is the ratio of the primary and secondary winding turns; Φm is the magnetic flux generated by the primary coil (8).

9. The electron accelerator with a three-dimensional structure according to claim 1, characterized in that: The base flange (1) is connected to the lower steel barrel component (2) by screws, the lower steel barrel component (2) is connected to the upper steel barrel component (6) by screws, and the upper steel barrel component (6) is connected to the steel barrel top cover (11) by screws.

Images