Electron curtain accelerator

Abstract

The utility model relates to an electronic curtain accelerator, including big steel cylinder, the cathode assembly of setting in the big steel cylinder inside, the filament power supply of power supply to the cathode assembly, the big steel cylinder with the cathode assembly between be equipped with insulation connecting assembly, the surface of big steel cylinder is equipped with first through -hole, the insulation connecting assembly is worn in first through -hole, at least part insulation connecting assembly is located the outside of big steel cylinder, the insulation connecting assembly connects the middle part of cathode assembly. The utility model will adopt the middle fixed mode to cathode assembly, make the load distribution uniform, the deformation of cathode assembly is smaller can effectively avoid the situation of the cathode assembly droop because of the overlong force arm, improve the stability of cathode assembly, and can further increase the length of cathode assembly, effectively increased the width of electronic curtain accelerator, widened the use scene of equipment.

Description

Technical Field

[0001] This utility model relates to the field of irradiation equipment technology, and in particular to an electron curtain accelerator. Background Technology

[0002] An electron curtain accelerator is a large, high-voltage accelerator without an accelerating tube or scanning device. It is characterized by its small size, regular shape, and simple structure. The electron accelerator mainly consists of a cathode assembly and an anode. During operation, the filament of the cathode assembly is heated by an electric current, generating a large number of electrons. Under the influence of the high-voltage electric field between the anode and cathode, these electrons move at high speed towards the anode, generating very high energy.

[0003] Currently, electron curtain accelerators are receiving widespread market attention in the EB (electron beam curing) industry due to their compact structure and high beam density. Common electron curtain accelerator structures include single-filament and multi-filament structures, and their cathode components mostly adopt a single-end cantilever fixing method. For single-filament structures, due to the small filament beam current, the single-end cantilever fixing method is currently the optimal solution. However, for multi-filament structures, the cathode components are longer, and with the addition of high-voltage feed structures such as high-voltage transformers, the equipment length is relatively large. Moreover, due to the special stress characteristics of the single-end cantilever method, the support structure at the base of long and wide equipment will be more complex. Furthermore, after a period of use, the cathode component may sag away from the support end, causing the beam output direction of the electron curtain accelerator to deviate, affecting the equipment's performance.

[0004] Therefore, there is a need for an electron curtain accelerator that moves the cathode assembly to the center, thereby reducing the horizontal length of the device and preventing it from sagging after prolonged use, thus avoiding beam deviation and improving operational stability. Summary of the Invention

[0005] In order to overcome the shortcomings of the existing technology, this utility model provides an electronic curtain accelerator.

[0006] The technical solution of this utility model is as follows:

[0007] An electron curtain accelerator includes a large steel cylinder, a cathode assembly disposed inside the large steel cylinder, and a filament power supply for supplying power to the cathode assembly. An insulating connection assembly is provided between the large steel cylinder and the cathode assembly. A first through hole is provided on the surface of the large steel cylinder, and the insulating connection assembly passes through the first through hole. At least a portion of the insulating connection assembly is located outside the large steel cylinder, and the insulating connection assembly is connected to the middle part of the cathode assembly.

[0008] As a further improvement of this utility model, the insulating connection assembly includes an insulating member and a first connecting member disposed on the insulating member. The first end of the first connecting member passes through the first through hole and is connected to the cathode assembly. The insulating member is provided with a limiting part, which prevents the insulating member from passing through the first through hole.

[0009] As a further improvement of this utility model, the top and bottom of the insulating member are through, the first connecting member is inserted inside the insulating member, a second connecting member is provided between the first connecting member and the insulating member, a third connecting member is provided between the first end of the first connecting member and the cathode assembly, the second end of the first connecting member is connected to the filament power supply, a channel is provided inside the first connecting member, and the power line of the filament power supply passes through the channel and is electrically connected to the cathode assembly.

[0010] As a further improvement of this utility model, the insulating component is in the shape of a frustum, and the diameter of the end of the insulating component with a larger area is larger than the diameter of the first through hole.

[0011] As a further improvement of this utility model, the limiting part includes at least one limiting block disposed on the surface of the insulating member.

[0012] As a further improvement of this utility model, there are multiple limiting blocks, and the multiple limiting blocks are evenly distributed.

[0013] As a further improvement of this utility model, adjacent limiting blocks abut against each other, and all the limiting blocks form a limiting ring.

[0014] As a further improvement of this utility model, the limiting block is detachable and there are multiple types of limiting blocks, and the lengths of the multiple limiting blocks are different.

[0015] As a further improvement of this utility model, the second connector includes an internal thread provided on the insulating member and an external thread provided on the first connector.

[0016] As a further improvement of this utility model, the upper surface of the cathode assembly is provided with a second through hole, and the third connector includes a through hole screw and a tightening nut. The through hole screw is sleeved on the first connector, the first end of the through hole screw passes through the second through hole and is threadedly connected to the tightening nut, and the diameter of the second end of the through hole screw is larger than the diameter of the second through hole.

[0017] According to the above-described solution, the beneficial effects of this utility model are as follows:

[0018] 1. This utility model adopts a central fixing method for the cathode assembly, which makes the load distribution uniform and the deformation of the cathode assembly small, effectively avoiding the situation where the cathode assembly sags due to excessive lever arm, and improving the stability of the cathode assembly.

[0019] 2. This utility model changes the fixing method of the cathode assembly from one end to the middle, which expands the overall operating space and facilitates the subsequent installation of the cathode assembly.

[0020] 3. The overall structure of this utility model is compact, which effectively reduces the horizontal length of the equipment, making it easier to integrate the equipment into the production line and providing technical support for the industrialization and promotion of the equipment;

[0021] 4. This utility model can further increase the length of the cathode assembly, effectively increasing the width of the electron curtain accelerator and broadening the application scenarios of the equipment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a partial enlarged view of part A of this utility model.

[0024] In the diagram: 1. Large steel cylinder; 2. Cathode assembly; 3. Filament power supply; 4. Insulating component; 41. Limiting part; 5. First connecting component; 6. Through-hole screw; 7. Tightening nut. Detailed Implementation

[0025] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0028] See Figure 1 and Figure 2 This utility model provides an electron curtain accelerator, including a large steel cylinder 1, a cathode assembly 2 disposed inside the large steel cylinder 1, and a filament power supply 3 supplying power to the cathode assembly 2. An insulating connection assembly is provided between the large steel cylinder 1 and the cathode assembly 2, connecting them to form a potential difference, thus meeting the operational requirements of the electron curtain accelerator. The fixed position of the filament power supply 3 is not limited; it can be placed inside or outside the large steel cylinder 1 according to specific usage requirements, as long as it supplies power to the cathode assembly 2. A first through hole is provided on the surface of the large steel cylinder 1, and the insulating connection assembly passes through the first through hole. At least part of the insulating connection assembly is located outside the large steel cylinder 1. The insulating connection assembly connects to the middle of the cathode assembly 2, but is not limited to the exact center of the cathode assembly 2. Taking the cathode assembly 2 as an example, which is divided into three equal segments along its length, the insulating connection assembly can... The cathode assembly 2 can be connected to any position in the middle section. Alternatively, it can be divided into four, five, or other equal parts along its length according to specific usage requirements. The insulating connection component can be connected to any other segment besides the two outermost segments of the cathode assembly 2. This invention uses a middle-fixed method for the cathode assembly 2, resulting in uniform load distribution and smaller deformation, effectively preventing sagging due to excessive lever arm length, thus improving the stability of the cathode assembly 2. It also further increases the length of the cathode assembly 2, effectively increasing the width of the electron curtain accelerator and broadening the equipment's application scenarios. Furthermore, changing the fixing method of the cathode assembly 2 from one end to the middle expands the overall operating space, facilitating subsequent installation of the cathode assembly 2. Simultaneously, the overall structure is compact, effectively reducing the lateral length of the equipment, which is beneficial for embedding the equipment into industrial lines and provides technical support for the industrialization and promotion of the equipment.

[0029] As one embodiment of this utility model, the first through hole is set on the upper surface of the large steel cylinder 1, and the cathode assembly 2 is set horizontally. The filament drooping can be well controlled by the clamping devices at both ends or tension springs, so as to ensure the uniformity of the electron beam. In addition, the horizontal setting of the cathode assembly 2 is conducive to making the electric field distribution between the cathode assembly 2 and other electrodes more uniform and symmetrical, so that the electrons are subjected to a more uniform electric field force during the acceleration process, thereby improving the quality and uniformity of the electron beam, which is beneficial to the extraction and acceleration of electrons and reducing the scattering and distortion of the electron beam.

[0030] As an embodiment of this utility model, the insulating connection assembly includes an insulating member 4 and a first connecting member 5 disposed on the insulating member 4. The first end of the first connecting member 5 passes through the first through hole and is connected to the cathode assembly 2. The insulating member 4 is provided with a limiting part 41, which prevents the insulating member 4 from passing through the first through hole, thereby preventing the insulating member 4 from falling into the large steel cylinder 1 as a whole, thus realizing the connection between the large steel cylinder 1 and the cathode assembly 2. In addition, a connecting component can be added between the limiting part 41 and the large steel cylinder 1 to fix the two relatively. The connecting component can adopt various structures, such as threaded holes on both the limiting part 41 and the large steel cylinder 1, and then threaded connection between the two by screws, or fixing adhesive can be applied between the limiting part 41 and the large steel cylinder 1 to fix the two, or other connection structures can be adopted.

[0031] In one embodiment of this utility model, the top and bottom of the insulating member 4 are through-through, the first connecting member 5 is inserted into the insulating member 4, the first end of the first connecting member 5 extends into the large steel cylinder 1, and the second end of the first connecting member 5 does not pass through the insulating member 4. A second connecting member is provided between the first connecting member 5 and the insulating member 4, through which the position of the first connecting member 5 is fixed and adjusted. A third connecting member is provided between the first end of the first connecting member 5 and the cathode assembly 2, through which the position of the cathode assembly 2 is fixed and adjusted. The second end of the first connecting member 5 is connected to the filament power supply 3. A channel is provided inside the first connecting member 5, through which the power line of the filament power supply 3 passes and is electrically connected to the cathode assembly 2. That is, the filament power supply 3 is set outside the large steel cylinder 1 and fixed on the first connecting member 5, which can reduce the difficulty of installation and maintenance of the filament power supply 3, and further reduce the usable space inside the large steel cylinder 1, thereby improving the space utilization rate.

[0032] As one embodiment of this utility model, the insulating member 4 is frustum-shaped. The diameter of the end with a larger area of ​​the insulating member 4 is larger than the diameter of the first through hole. During installation, the end with a smaller area of ​​the insulating member 4 is inserted into the first through hole. As the insulating member 4 extends in, the side wall of the insulating member 4 abuts against the wall of the first through hole, preventing the insulating member 4 from continuing to pass through the first through hole, thereby limiting the insulating member 4 and preventing the insulating member 4 from falling into the large steel cylinder 1 as a whole. This improves the stability and reliability of the installation of the insulating member 4. In order to ensure the reliability of the connection between the insulating member 4 and the large steel cylinder 1 and the safety of use, the insulating member 4 has a certain rigidity. Preferably, the insulating member 4 is a ceramic cone.

[0033] As one embodiment of this utility model, the insulating member 4 can adopt various shapes and structures. The limiting part 41 includes at least one limiting block disposed on the surface of the insulating member 4, which can limit the insulating member 4 and ensure that at least part of the insulating member 4 is located outside the large steel cylinder 1. That is, a part of the insulating member 4 extends into the large steel cylinder 1, and the other part cannot pass through the first through hole under the action of the limiting block and is located outside the large steel cylinder 1. Alternatively, the insulating member 4 is only connected to the outer wall of the large steel cylinder 1, and the whole part cannot pass through the first through hole, that is, the whole insulating member 4 is located outside the large steel cylinder 1. Preferably, a fixing member is provided between the limiting block and the large steel cylinder 1 for fixing, which improves the connection strength between the insulating member 4 and the large steel cylinder 1, avoids the risk of the insulating member 4 loosening, shaking or even falling off during use, and further improves the stability and safety of the electronic curtain accelerator. The fixing member can adopt various structures, such as bolts and nuts, fixing glue, welding, etc.

[0034] As one embodiment of this utility model, there are multiple limiting blocks, which are evenly distributed so that the multiple limiting blocks can limit the insulating component 4 at multiple locations and angles, making the overall force on the insulating component 4 uniform, improving the limiting stability and reliability. At the same time, the multiple limiting blocks can form limiting redundancy among each other. When one limiting block is damaged, the remaining limiting blocks can still continue to provide the limiting function for the insulating component 4, ensuring that the electronic curtain accelerator can continue to work normally, improving the overall working stability and safety of use.

[0035] As one embodiment of this utility model, there are multiple limiting blocks. Adjacent limiting blocks abut each other, and all the limiting blocks form a limiting ring to achieve all-round limiting of the insulating component 4. This maximizes the limiting of the insulating component 4 and further improves the reliability and stability of the limiting. In addition, adjacent limiting blocks can cooperate with each other. For example, in two adjacent limiting blocks, one limiting block has a protrusion and the other limiting block has a groove. The protrusion is inserted into the corresponding groove to realize the assembly between adjacent limiting blocks, further improving the overall strength. Alternatively, multiple limiting blocks can be formed into a whole by welding, gluing, or other methods, further improving the overall stability.

[0036] As one embodiment of this utility model, the limiting block is detachable and has multiple types, with different lengths. The length of the limiting block is the distance between the end of the limiting block away from the insulating member 4 and the end close to the insulating member 4. Different lengths of limiting blocks can be selected according to specific usage requirements, so that the operator can select the appropriate length of the limiting block according to the specific size of the first through hole, ensuring that the limiting block can achieve the required limiting effect, improving the selectivity of the limiting block, and increasing the overall applicability.

[0037] As one embodiment of this utility model, the second connector can be structurally selected according to specific usage requirements, such as the following three structures:

[0038] Structure 1: The second connector includes an internal thread on the insulating member 4 and an external thread on the first connector 5, and the insulating member 4 is threadedly connected to the first connector 5;

[0039] Structure 2: The second connector is a fixing adhesive set between the insulating component 4 and the first connector 5;

[0040] Structure 3: The second connector includes a buckle on the insulating member 4 and a locking block on the first connector 5, and the insulating member 4 and the first connector 5 are engaged.

[0041] Similarly, the second connector is not limited to the above three structures; other connection structures can also be used.

[0042] Preferably, a sealing element is provided between the insulating element 4 and the first connecting element 5. The sealing element can effectively prevent impurities, dust or other particles from entering the large steel cylinder 1, thereby improving the working stability and safety of the electronic curtain accelerator. The sealing element can be a sealing ring, sealant, etc.

[0043] As an embodiment of this utility model, the upper surface of the cathode assembly 2 is provided with a second through hole, and the third connecting member includes a through hole screw 6 and a tightening nut 7. The through hole screw 6 is sleeved on the first connecting member 5. The first end of the through hole screw 6 passes through the second through hole and is threadedly connected to the tightening nut 7. The diameter of the second end of the through hole screw 6 is larger than the diameter of the second through hole, that is, the second end of the through hole screw 6 cannot pass through the second through hole. The through hole screw 6 and the tightening nut 7 clamp the upper surface of the cathode assembly 2 in the middle for fixation.

[0044] Installation steps:

[0045] 1. Install the insulating component 4 onto the large steel cylinder 1 and adjust the level of the insulating component 4;

[0046] 2. Install the filament power supply 3 to the second end of the first connector 5, and insert the first end of the first connector 5 into the first through hole. Fix the first connector 5 and the insulating part 4 relative to each other through the second connector.

[0047] 3. Install the through-hole screw 6 onto the first end of the first connector 5, and then fit the second through hole of the cathode assembly 2 onto the through-hole screw 6 to adjust the horizontal and vertical positions of the cathode assembly 2.

[0048] 4. Tighten the screw nut 7 to secure the cathode assembly 2.

[0049] In summary, this utility model provides an electronic curtain accelerator. By fixing the cathode assembly 2 in the middle, the load distribution is uniform, and the deformation of the cathode assembly 2 is small, which effectively avoids the sagging of the cathode assembly 2 due to excessive lever arm, thus improving the stability of the cathode assembly 2. It can also further increase the length of the cathode assembly 2, effectively increasing the width of the electronic curtain accelerator and broadening the application scenarios of the equipment. In addition, changing the fixing method of the cathode assembly 2 from one end to the middle expands the overall operating space, facilitating the subsequent installation of the cathode assembly 2. At the same time, the overall structure is compact, effectively reducing the lateral length of the equipment, which is conducive to the integration of the equipment into the industrial line and provides technical support for the industrialization and promotion of the equipment. The limiting part 41 prevents the insulating part 4 from passing through the first through hole, so that the insulating part 4 will not fall into the interior of the large steel cylinder 1, realizing the connection between the large steel cylinder 1 and the cathode assembly 2. The filament power supply 3 is set on the outside of the large steel cylinder 1 and fixed on the first connecting part 5, which can reduce the installation and maintenance difficulty of the filament power supply 3 and further reduce the usable space inside the large steel cylinder 1, improving the space utilization rate.

[0050] It should be emphasized that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. An electron curtain accelerator, characterized in that, The device includes a large steel cylinder (1), a cathode assembly (2) disposed inside the large steel cylinder (1), and a filament power supply (3) supplying power to the cathode assembly (2). An insulating connection assembly is provided between the large steel cylinder (1) and the cathode assembly (2). A first through hole is provided on the surface of the large steel cylinder (1). The insulating connection assembly passes through the first through hole. At least a portion of the insulating connection assembly is located outside the large steel cylinder (1). The insulating connection assembly is connected to the middle part of the cathode assembly (2).

2. The electron curtain accelerator according to claim 1, characterized in that, The insulating connection assembly includes an insulating member (4) and a first connector (5) disposed on the insulating member (4). The first end of the first connector (5) passes through the first through hole and is connected to the cathode assembly (2). The insulating member (4) is provided with a limiting part (41), which prevents the insulating member (4) from passing through the first through hole.

3. The electron curtain accelerator according to claim 2, characterized in that, The top and bottom of the insulating member (4) are through, the first connecting member (5) is inserted inside the insulating member (4), a second connecting member is provided between the first connecting member (5) and the insulating member (4), a third connecting member is provided between the first end of the first connecting member (5) and the cathode assembly (2), the second end of the first connecting member (5) is connected to the filament power supply (3), a channel is provided inside the first connecting member (5), and the power line of the filament power supply (3) passes through the channel and is electrically connected to the cathode assembly (2).

4. The electron curtain accelerator according to claim 3, characterized in that, The insulating element (4) is frustum shaped, and the diameter of the end of the insulating element (4) with a larger area is greater than the diameter of the first through hole.

5. The electron curtain accelerator according to claim 3, characterized in that, The limiting part (41) includes at least one limiting block disposed on the surface of the insulating member (4).

6. The electron curtain accelerator according to claim 5, characterized in that, There are multiple limiting blocks, and the multiple limiting blocks are evenly distributed.

7. The electron curtain accelerator according to claim 6, characterized in that, The adjacent limiting blocks abut against each other, and all the limiting blocks form a limiting ring.

8. The electron curtain accelerator according to any one of claims 5-7, characterized in that, The limiting block is detachable and there are multiple types, and the lengths of the various limiting blocks are different.

9. The electron curtain accelerator according to claim 3, characterized in that, The second connector includes an internal thread on the insulating member (4) and an external thread on the first connector (5).

10. The electron curtain accelerator according to claim 3, characterized in that, The upper surface of the cathode assembly (2) is provided with a second through hole. The third connector includes a through hole screw (6) and a tightening nut (7). The through hole screw (6) is sleeved on the first connector (5). The first end of the through hole screw (6) passes through the second through hole and is threadedly connected to the tightening nut (7). The diameter of the second end of the through hole screw (6) is greater than the diameter of the second through hole.

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