Device for enhancing guidance quality of electron emission

Abstract

The utility model belongs to the technical field of electron flow emitting devices, and particularly relates to a device for enhancing electron emission guidance quality, which comprises a base, a guide piece column and at least one lamp filament, each pair of conductive columns penetrate through the base and are electrically connected with a power supply, and the lamp filament is electrically connected with the conductive columns. The two ends of the connecting position of the conductive column and the base are respectively provided with an insulating part wrapping the conductive column, and the guiding part is fixedly installed on the base and located behind the lamp filament so as to reduce the phenomenon that electrons emitted by the lamp filament thermally flow to be dissipated in a non-working area. A plurality of independent power supplies can be connected so as to control the density of the electron flow, the use of multiple working areas is met, and the dissipation direction of the electron flow can be controlled through the guide piece.

Description

TECHNICAL FIELD

[0001] The utility model belongs to electronic flow emission device technical field, specifically a kind of device of strengthening electronic emission directionality. BACKGROUND

[0002] In the application fields such as current neutralization, electron beam heating and plasma generation, the hot electron emission device has become the preferred technical solution for generating space electron flow due to its advantages of easy operation, flexible control and low cost. However, the traditional filament hot emission device has significant technical defects: when there is a distance between the filament and the effective working area, the electron flow generated by thermal emission will produce non-directional escape, resulting in a considerable proportion of electron flow lost to the non-working area, not only causing energy waste, but also affecting the processing effect of the target workpiece.

[0003] Therefore, it is necessary to design an emission device that can control the emission direction of electron flow. SUMMARY

[0004] Based on this, the present application provides a device for strengthening the directionality of electron emission, which can control the escape of electron flow to the non-working area, reduce energy waste, and adjust the emission direction of electron flow.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] A device for strengthening the directionality of electron emission, comprising: a base, a guide piece and at least one pair of conductive columns connected to the base, at least one filament or two or more pairs of conductive columns electrically insulated from each other are connected between the pair of conductive columns, and each pair of conductive columns is connected to a filament; each pair of conductive columns is connected to an independent external power supply, a fastener is provided between the guide piece and the base for fixed connection of the two, the guide piece is a conductive metal plate structure, the guide piece and the base are at the same potential, the potential difference between the guide piece and the working area is greater than the size of the alternating current required for filament thermal emission electrons, and the guide piece is provided with at least one guide surface facing the electron flow working area.

[0007] Optionally, in an embodiment of the utility model, at least one support structure is further included for providing physical support for the filament, and the support structure is arranged on the base.

[0008] Optionally, in an embodiment of the utility model, the guide piece is a sheet structure, and the guide piece is provided with an avoidance opening to avoid other structural components.

[0009] Optionally, in an embodiment of the utility model, the guide piece is provided with an inclined guide surface on each side, and the inclined guide surfaces on both sides are the same size.

[0010] Optionally, in an embodiment of the utility model, two sides of the guide piece are respectively provided with two or more than two adjustable inclination angle inclination guide surfaces, and the sizes of the inclination guide surfaces are different.

[0011] Compared with the prior art, the device for strengthening electron emission directionality has the following characteristics:

[0012] A guide piece for electron flow is arranged behind the filament, and the guide piece is mounted on the mounting structure of the filament, so that the overall structure is more compact, and the mounting space is saved.

[0013] The arrangement of the guide piece can guide the part of the electron flow originally escaping to the non-working area to the working area, thereby improving the electron flow density and the efficiency of filament thermal emission.

[0014] The two sides of the guide piece are also provided with adjustable angle inclination guide surfaces, the divergence direction of the electron flow can be controlled by adjusting the inclination angle, and in the case of multiple filaments, the guide piece is also provided with two or more than two inclination guide surfaces with independently adjustable inclination angles, so that the electron flow can be diverged to different directions. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0016] Figure 1 It is a device structure schematic view for strengthening electron emission directionality of the utility model embodiment 1;

[0017] Figure 2 It is a device structure schematic view for strengthening electron emission directionality of the utility model embodiment 2;

[0018] Figure 3 It is a device structure schematic view for strengthening electron emission directionality of the utility model embodiment 3;

[0019] Figure 4 It is a device structure schematic view for strengthening electron emission directionality of the utility model embodiment 4;

[0020] Figure 5 It is a device structure schematic view for strengthening electron emission directionality of the utility model embodiment 5;

[0021] Reference signs: base 1, conductive column 2, limiting base 201, filament 3, guide 4, fastener 401, conductive seat 5, clamping block 501, connecting piece 502, tubular insulating piece 503, fixing base 504. DETAILED DESCRIPTION

[0022] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The technical solutions of the present application will be further described below in combination with the drawings of the embodiments of the present application. The present application is not limited to the following specific embodiments.

[0023] It should be understood that the same or similar reference signs in the drawings of the embodiments correspond to the same or similar components. In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "top" and "bottom" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation. Therefore, the terms describing the positional relationship in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the present patent. For those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0024] Since the existing thermionic emission device has electron escape, waste of energy consumption, and cannot meet the use demand of two or more working areas requiring different density and size of electron flow, a high-efficiency filament 3 clamping device is designed, and the specific scheme is as follows:

[0025] Embodiment 1

[0026] As shown in Figure 1 A device for enhancing the electron emission guiding property, comprising: a base 1, a pair of conductive columns 2 and an insulating connection on the base 1, a filament 3 connected between the pair of conductive columns 2, the conductive columns 2 electrically connected with an external power supply, the guide 4 located behind the filament 3, the fastener 401 provided between the guide 4 and the base 1 for fixed connection of the two, the guide 4 being a conductive metal plate structure, the guide 4 and the base 1 being equipotential, the potential of the guide 4 being set to be lower than the working area, the potential difference amplitude being greater than the size of the alternating current required by the thermionic emission electrons of the filament 3, the guide 4 being provided with at least one guiding surface facing the electron flow working area.

[0027] The conductive column 2 is a rod-shaped structure, the middle part of the conductive column 2 is provided with a limiting part, the conductive column 2 is arranged in the base 1 and the arrangement position is provided with a tubular insulating part, the upper end of the conductive column 2 is provided with a screw-fixed connecting block, the connecting block clamps the filament 3 at the upper end of the conductive column 2, the conductive column 2 is further provided with a limiting base 201, the limiting base 201 is screw-connected with the base 1 and the limiting base 201 is an insulating part, the bottom of the conductive column 2 is provided with a plug-in hole, which is used for quickly completing the connection of the conductive column 2 and the power supply.

[0028] The guide 4 is a sheet-shaped structure, the length covers the length of the base 1, the guide 4 is provided with a position-avoiding opening to avoid the conductive column 2, specifically, the two sides of the guide 4 are respectively provided with a position-avoiding opening, which is used for avoiding the conductive column 2 and the supporting structure, and there is no physical contact between the guide 4 and the conductive column 2, the two sides of the guide 4 are respectively provided with two fasteners 401, the lower end of the fastener 401 is provided with a stud, the upper end is provided with a screw hole, the lower end is used for connecting the base 1, and the upper end is used for installing the guide 4.

[0029] In the embodiment, the two sides of the guide 4 are respectively provided with an inclined guide surface, the sizes of the two sides of the inclined guide surface are the same, and the length of the inclined guide surface is the same as the length of the guide 4.

[0030] Embodiment 2

[0031] As shown in Figure 2 A device for enhancing the electron emission guiding property, comprising: a base 1, a guide 4 and a pair of conductive columns 2 which are insulatedly connected to the base 1, a filament 3 is connected between the pair of conductive columns 2, the conductive column 2 is electrically connected with an external power supply, the guide 4 is located behind the filament 3, a fastener 401 is arranged between the guide 4 and the base 1, which is used for fixedly connecting the two, the guide 4 is a conductive metal plate structure, the guide 4 and the base 1 are equipotential, the potential of the guide 4 is set to be lower than the working area, the potential difference amplitude is greater than the size of the alternating current required by the thermal emission electron of the filament 3, the guide 4 is provided with at least one guide surface facing the electron flow working area.

[0032] The conductive column 2 is a rod-shaped structure, the middle part of the conductive column 2 is provided with a limiting part, the conductive column 2 is arranged in the base 1 and the arrangement position is provided with a tubular insulating part, the upper end of the conductive column 2 is provided with a screw-fixed connecting block, the connecting block clamps the filament 3 at the upper end of the conductive column 2, the conductive column 2 is further provided with a limiting base 201, the limiting base 201 is screw-connected with the base 1 and the limiting base 201 is an insulating part, the bottom of the conductive column 2 is provided with a plug-in hole, which is used for quickly completing the connection of the conductive column 2 and the power supply.

[0033] The guide 4 is a sheet-like structure, and its length covers the length of the base 1. The guide 4 has a clearance opening to avoid the conductive post 2. Specifically, the guide 4 has clearance openings on both sides to avoid the conductive post 2 and the support structure. There is no physical contact between the guide 4 and the conductive post 2. The guide 4 has two fasteners 401 on both sides. The lower end of the fastener 401 has a stud and the upper end has a screw hole. The lower end is used to connect to the base 1 and the upper end is used to install the guide 4.

[0034] In this embodiment, the guide 4 is a flat sheet structure, and its length covers the length of the base 1.

[0035] Example 3

[0036] like Figure 3 As shown, a device for enhancing electron emission guidance includes: a base 1, a guide 4, and a pair of conductive posts 2 insulatedly connected to the base 1. A filament 3 is connected between the pair of conductive posts 2. The conductive posts 2 are electrically connected to an external power source. The guide 4 is located behind the filament 3. A fastener 401 is provided between the guide 4 and the base 1 for fixing the two. The guide 4 is a conductive metal plate structure. The guide 4 and the base 1 are at the same potential. The potential of the guide 4 is set to be lower than that of the working area. The potential difference is greater than the amount of alternating current required for the thermionic emission of electrons by the filament 3. The guide 4 has at least one guiding surface facing the working area of ​​the electron flow.

[0037] The conductive post 2 is a rod-shaped structure with a limiting part in the middle. The conductive post 2 passes through the base 1 and has a tubular insulating component at the passing position. The upper end of the conductive post 2 has a connecting block fixed by screws. The filament 3 is clamped to the upper end of the conductive post 2 through the connecting block. The conductive post 2 also has a limiting base 201, which is screwed to the base 1 and is an insulating component. The bottom of the conductive post 2 has a plug hole for quick connection between the conductive post 2 and the power supply.

[0038] The guide 4 is a sheet-like structure, and its length covers the length of the base 1. The guide 4 has a clearance opening to avoid the conductive post 2. Specifically, the guide 4 has clearance openings on both sides to avoid the conductive post 2 and the support structure. There is no physical contact between the guide 4 and the conductive post 2. The guide 4 has six fasteners 401. The lower end of the fastener 401 has a stud and the upper end has a screw hole. The lower end is used to connect to the base 1 and the upper end is used to install the guide 4.

[0039] In the embodiment, the guide 4 is divided into three parts, left, middle and right, each part is provided with an inclined guide surface on both sides, and the size of the inclined guide surface of each part is different, the size of the inclined guide surface of the same part is also different, the electron flow is guided to different divergence directions by the guide 4 of the three parts to meet the working requirements, and each part of the guide 4 can be disassembled separately.

[0040] Embodiment 4

[0041] As Figure 4 shown, a device for enhancing the electron emission guide property comprises a base 1, a guide 4 and three pairs of conductive columns 2 insulatedly connected to the base 1, the three pairs of conductive columns 2 are electrically insulated from each other, each of the three pairs of conductive columns 2 is connected with a filament 3, the conductive column 2 is electrically connected with an external power supply, the guide 4 is located behind the filament 3, a fastener 401 is arranged between the guide 4 and the base 1 for fixed connection of the two, the guide 4 is a conductive metal plate structure, the guide 4 and the base 1 are equipotential, the potential of the guide 4 is set to be lower than that of the working area, the potential difference amplitude is greater than the size of the alternating current required by the thermal emission electron of the filament 3, and the guide 4 is provided with at least one guide surface facing the electron flow working area.

[0042] A plurality of circular through holes are formed in the base 1 for mounting the conductive column 2 located in the middle of the base 1.

[0043] The conductive column 2 is a rod structure, the middle part of the conductive column 2 is provided with a limiting part, the conductive column 2 is arranged in the base 1 and the pipe-shaped insulating part is arranged at the position where the conductive column 2 is arranged, the upper end of the conductive column 2 is provided with a screw-fixed connecting block, the filament 3 is clamped on the upper end of the conductive column 2 through the connecting block, the conductive column 2 is also provided with a limiting base 201, the limiting base 201 is screw-connected with the base 1 and the limiting base 201 is an insulating part, and the bottom of the conductive column 2 is provided with a plug-in hole for quick connection of the conductive column 2 with the power supply.

[0044] The guide 4 is a sheet structure, the length of the guide 4 covers the length of the base 1, the guide 4 is provided with a position-avoiding opening to avoid the conductive column 2, specifically, the two sides of the guide 4 are respectively provided with a position-avoiding opening to avoid the conductive column 2 and the supporting structure, and there is no physical contact between the guide 4 and the conductive column 2, the guide 4 is provided with six fasteners 401, the lower end of the fastener 401 is provided with a stud, the upper end is provided with a screw hole, the lower end is used for connecting the base 1, and the upper end is used for mounting the guide 4.

[0045] The guide 4 is divided into left, middle and right parts, each part is provided with an inclined guide surface on both sides, and the size of the inclined guide surface of each part is different, and the size of the inclined guide surface of the same part is also different, so as to independently control the emission of each filament 3, and guide the electron flow to different divergence directions through the guide 4 of the three parts to meet the working requirements. The guide 4 of each part can be disassembled independently, and each guide 4 is provided with a pair of conductive columns 2, and each pair of conductive columns 2 is independently connected to the power supply.

[0046] Embodiment 5

[0047] As shown in Figure 5 A device for enhancing the electron emission guide property, comprising a base 1, a guide 4 and a pair of conductive columns 2 insulatedly connected to the base 1, two filaments 3 connected between the conductive columns 2, the base 1 is provided with a support structure, the support structure comprises a fixed part, the fixed part comprises a pair of conductive seats 5, a connecting part 502 and two clamping blocks 501, the conductive seat 5 is installed on the base 1, the connecting part of the conductive seat 5 and the base 1 is provided with an insulating part, the connecting part 502 is installed on the conductive seat 5, the clamping block 501 is installed on the upper end of the conductive seat 5, and one end of the filament 3 is clamped by the clamping block 501 and the conductive seat 5.

[0048] The conductive column 2 is a rod structure, the middle part of the conductive column 2 is provided with a limiting part, the conductive column 2 is provided with a tubular insulating part at the penetrating position of the base 1, the upper end of the conductive column 2 is provided with a screw-fixed connecting block, the filament 3 is clamped by the connecting block and the upper end of the conductive column 2, the conductive column 2 is also provided with a limiting base 201, the limiting base 201 is screw-connected with the base 1 and the limiting base 201 is an insulating part, and the bottom of the conductive column 2 is provided with a plug-in hole for quickly connecting the conductive column 2 with the power supply.

[0049] The conductive seat 5 is penetratingly installed on the base 1, the penetrating position of the conductive seat 5 is provided with a tubular insulating part 503 for insulating and isolating the conductive seat 5 and the base 1, and the lower end of the conductive seat 5 is also provided with a fixed base 504 which is fixedly installed on the base 1, and the fixed base 504 is an insulating part.

[0050] The guide 4 is located behind the filament 3, and a fastener 401 is provided between the guide 4 and the base 1 for fixed connection, the guide 4 is a conductive metal plate structure, the guide 4 and the base 1 are equipotential, the potential of the guide 4 is set to be lower than the working area, and the potential difference amplitude is greater than the size of the alternating current required by the thermal emission electron of the filament 3, and the guide 4 is provided with at least one guide surface facing the electron flow working area.

[0051] The guide piece 4 is a sheet structure, the length covers the length of the base 1, the guide piece 4 is provided with a position avoiding opening to avoid the conductive column 2, specifically, the two sides of the guide piece 4 are respectively provided with a position avoiding opening, for avoiding the conductive column 2 and the supporting structure, and there is no physical contact between the guide piece 4 and the conductive column 2, the two sides of the guide piece 4 are respectively provided with two fasteners 401, the lower end of the fastener 401 is provided with a stud, the upper end is provided with a threaded hole, the lower end is used for connecting the base 1, and the upper end is used for mounting the guide piece 4.

[0052] In the embodiment, the guide piece 4 is a flat sheet structure, and the length covers the length of the base 1.

[0053] Working principle:

[0054] The guide piece 4 keeps the same potential with the base 1, and the electric field formed by the potential difference between the guide piece 4 and the working area has a strength greater than that required by the filament thermal emission, so as to help electrons escape from the filament and be accelerated or deflected to the working area along the field intensity direction.

[0055] The inclined guide surface of the guide piece 4 controls the electric field distribution through geometric configuration, the inclined guide surface makes the electric field lines present a diverging / converging shape, and the symmetrical guide surfaces on both sides form symmetrical distribution of the electric field and constrain the lateral diffusion of electrons.

[0056] The scheme is used for a device with strong electron emission guiding performance, the guide piece 4 for the electron flow is arranged behind the filament 3, the guide piece 4 is a conductive metal part, the guide piece 4 is mounted on the mounting structure of the filament 3, and the overall structure is more compact, and the mounting space is saved.

[0057] Through cooperation of the electric field and the structural design, the electron flow emission directivity and the beam current density are simultaneously improved.

[0058] The two sides of the guide piece 4 are also provided with adjustable inclined guide surfaces, the divergence direction of the electron flow can be controlled by adjusting the inclined angle, in the case of multiple filaments 3, the guide piece 4 is also provided with two or more than two inclined guide surfaces with independently adjustable inclined angles, so that the electron flow can diverge to different directions.

[0059] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not the limitation to the embodiments of the utility model. For ordinary skilled in the art, other different forms of changes or changes can be made on the basis of the above description. Here, it is not necessary and impossible to exhaust all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. An apparatus for enhancing electron emission directivity, characterized by comprising: The application relates to a lamp base, which comprises a base, a guide and at least one pair of electrically conductive columns insulatedly connected to the base, at least one lamp filament is connected between the pair of electrically conductive columns or two pairs of electrically conductive columns are electrically insulated from each other, each pair of electrically conductive columns is respectively connected with a lamp filament; an independent external power supply is connected to each pair of electrically conductive columns; a fastener is arranged between the guide and the base to fixedly connect the guide and the base; the guide is a conductive metal plate structure; the guide and the base are equipotential; the potential difference amplitude between the guide and a working area is greater than the size of alternating current required by hot emission electrons of the lamp filament; the guide is provided with at least one guide surface facing the electron flow working area. The application further comprises at least one supporting structure for providing physical support for the lamp filament, and the supporting structure is arranged on the base.

2. A device for enhancing electron emission directivity according to claim 1, wherein The guide is a sheet structure, and the guide is provided with a clearance opening to avoid other structural components.

3. The device of claim 1, wherein the device is configured to enhance electron emission directionality. The two sides of the guide are respectively provided with inclined guide surfaces with the same size.

4. The device of claim 1, wherein the device is configured to enhance electron emission directionality. The two sides of the guide are respectively provided with two or more inclined guide surfaces with adjustable inclination angles, and the sizes of the inclined guide surfaces are different.

5. The device of claim 1, wherein the device is configured to enhance electron emission directionality. ​

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