A high-voltage power supply device for electrostatic deflection plates

Abstract

The present invention relates to a high-voltage power supply device for an electrostatic deflection plate, comprising a high-voltage generator and a high-voltage connection device. The high-voltage generator is used to convert and transmit incoming alternating current (AC) electricity through high-frequency inversion and soft-switching technology. The high-voltage connection device is connected to the generator at one end and to the electrostatic deflection plate at the other end, transmitting the stepped high-voltage electrical energy output by the generator to the plate while ensuring the voltage resistance of the connection. The present invention can be widely applied in the field of nuclear technology.

Description

Technical Field

[0001] The invention belongs to the field of nuclear technology, and in particular relates to a high-voltage power supply device applied to an electrostatic deflection plate. Background Art

[0002] Heavy ion beams, with their Bragg peak effect and ultra-high relative biological effect, are becoming a revolutionary tool for precision radiotherapy. They offer high precision, short treatment duration, and a low risk of recurrence, making them internationally recognized as one of the most advanced and effective radiotherapy methods. Synchrotron accelerators are essential devices for providing finely tuned heavy ion beams, with development focused on miniaturization and low cost. Electrostatic deflection plates, core components of the injection and extraction systems, generate an electric field by applying high voltage, providing deflection for the heavy ion beam and are crucial to determining the circumference of a synchrotron.

[0003] Currently, the high-voltage generators used for electrostatic deflection plates primarily operate in a DC state, which is inadequate for the slow extraction of the accelerator beam. Furthermore, the traditional connection between the high-voltage generator and the electrostatic deflection plates involves connecting high-voltage wires made of polytetrafluoroethylene directly to the plates through connectors. Due to material limitations, only a narrow bend radius can be achieved. Furthermore, the gap between the wires and connectors is often a weak point in the high-voltage insulation, making it easy for exposed wires to penetrate the surrounding air and pose a safety risk. Summary of the Invention

[0004] In view of the above problems, the present invention aims to provide a high-voltage power supply device for an electrostatic deflection plate, which can output stepped high voltage electricity while ensuring reliable connection with the electrostatic deflection plate and voltage resistance performance.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A high-voltage power supply device for an electrostatic deflection plate, comprising:

[0007] High voltage generating device and high voltage connecting device;

[0008] The high-voltage generating device is used to convert the incoming AC power into electric energy through high-frequency inversion and soft switching technology, and output stepped high-voltage electric energy;

[0009] One end of the high-voltage connecting device is connected to the high-voltage generating device, and the other end is connected to the electrostatic deflection plate, so as to output the stepped high-voltage electric energy output by the high-voltage generating device to the electrostatic deflection plate, while ensuring the pressure resistance at the connection part.

[0010] Furthermore, the high-voltage generating device includes an industrial frequency rectifier module, a plurality of high-frequency inverter modules, a plurality of soft switch modules, a plurality of high-frequency isolation transformer modules, a plurality of high-voltage switch output modules and a control module;

[0011] The power frequency rectifier module is used to perform power frequency rectification on the incoming alternating current to obtain a direct current voltage;

[0012] The high-frequency inverter module and the soft switch module correspond one to one and are used to convert DC voltage into electric energy to meet the electric energy requirements under different load conditions;

[0013] The high-frequency isolation transformer modules are connected in series, with their primary sides coupled to the soft switch modules and their secondary sides coupled to the two high-voltage switch output modules, to achieve high-frequency isolation.

[0014] Each of the high-voltage switch output modules is used to achieve stepped high-voltage variable energy output;

[0015] The control module is used to control and adjust the switching frequency of the soft switching module and the switching timing of the high-voltage switch output module according to different load conditions or step requirements.

[0016] Furthermore, a first cavity inclined obliquely upward relative to the vacuum chamber is provided at the connection portion between the electrostatic deflection plate and the high-voltage connection device, and a socket for connecting the high-voltage connection device is formed in the first cavity.

[0017] Furthermore, the high-voltage connection device includes an insulating housing, a high-voltage cable, a high-voltage resistor, a high-voltage connector and an elastic conductive plug;

[0018] An annular protrusion is formed at a preset position on the outer surface of the insulating shell, and a sealing groove for installing a sealing ring is provided on the annular protrusion to achieve a sealed connection between the annular protrusion and the first cavity on the electrostatic deflection plate;

[0019] A second cavity is formed inside the insulating shell, and the second cavity is divided into an installation cavity and an adjustment cavity by a partition;

[0020] A high-voltage cable is provided in the installation cavity, and one end of the high-voltage cable is connected to the high-voltage generating device, and the other end of the high-voltage cable is electrically connected to the high-voltage resistor provided in the adjustment cavity through a welded lantern pin;

[0021] The other end of the high-voltage resistor is plugged into and matched with the socket on the electrostatic deflection plate through the high-voltage connector and the elastic conductive plug.

[0022] Furthermore, the high-voltage connecting device also includes a stepped connecting sleeve, one end of which is inserted into the insulating shell and is detachably sealed and connected to the regulating cavity close to the high-voltage connector; the high-voltage connector is covered on the outside of the other end of the connecting sleeve and is locked to the high-voltage connector through a locking member.

[0023] Furthermore, the high-voltage resistor is arranged in the adjustment cavity through a mounting seat, and the mounting seat is made of conductive material. Along the length direction of the high-voltage connection device, one end of the mounting seat is provided with a mounting hole matching the lantern pin, and the outer surface of the lantern pin is provided with a spring plate for close connection with the mounting seat;

[0024] A mounting groove is formed at the other end of the mounting seat, a conductive spring is arranged in the mounting groove, and an end of the conductive spring is electrically connected to the high-voltage resistor through a conductive cap.

[0025] Furthermore, a conductive core is provided between the high-voltage resistor and the high-voltage connector;

[0026] The outer surface of the conductive core is provided with a stepped protrusion, and the high-voltage connector is provided with a snap-fit ​​groove matching the outer protrusion of the conductive core, for achieving snap-fitting between the conductive core and the high-voltage connector;

[0027] The inner surface of the conductive core is also provided with a groove for clamping the high-voltage resistor.

[0028] Furthermore, an elastic member is provided between the conductive core and the high-voltage connector to ensure a reliable connection between the conductive core and the high-voltage connector;

[0029] The outer surface of the conductive plug is provided with an elastic member for ensuring reliable connection with the socket inside the electrostatic deflection plate.

[0030] Furthermore, an oil injection channel is provided on the insulating housing, and two ends of the oil injection channel are respectively located on both sides of the annular protrusion;

[0031] A first through hole and a second through hole communicating with the oil injection channel are provided on a side of the insulating housing away from the annular protrusion, wherein the first through hole is an exhaust hole and the second through hole is an inclined hole for extending from the oil injection channel into the cavity and injecting and extracting insulating oil from the cavity;

[0032] The portion of the insulating shell extending into the cavity of the electrostatic deflection plate is provided with a third through hole and a fourth through hole on its outer surface. The third through hole and the fourth through hole are respectively connected to the adjustment cavity to facilitate the insulating oil in the cavity to flow into the adjustment cavity.

[0033] Furthermore, an oil leakage hole is provided on the groove wall of the mounting groove of the mounting seat, so as to ensure that all places in the adjustment cavity can be completely filled with insulating oil.

[0034] The present invention has the following advantages due to the adoption of the above technical solution:

[0035] 1. The high-voltage generator proposed in the present invention, through the design of a high-frequency inverter module, a soft switch module, and a high-voltage switch output module, can provide high-voltage feed (>200kV) and high-voltage dynamic adjustment (e.g., stepped) for the electrostatic deflection plates within a control cycle;

[0036] 2. The high-voltage connection device proposed in the present invention has high insulation performance while ensuring reliable conductivity, and can flexibly adjust the internal high-voltage matching resistor type according to actual needs, providing system overcurrent protection that meets the needs, and providing universal matching resistor installation conditions for electrostatic deflection plates with different structures and different working conditions.

[0037] In conclusion, the present invention can be widely applied in the field of nuclear technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. Throughout the drawings, the same reference numerals are used to denote the same components. In the drawings:

[0039] Figure 1 1 is a schematic structural diagram of a high-voltage power supply device applied to an electrostatic deflection plate provided in an embodiment of the present invention;

[0040] Figure 2 1 is a schematic diagram of the circuit principle of the high voltage generating device provided in an embodiment of the present invention;

[0041] Figure 3 The electrostatic deflection plate provided in the embodiment of the present invention has a stepped high-voltage energy waveform;

[0042] Figure 4 Schematic diagram of the connection structure between the high-voltage connection device and the electrostatic deflection plate provided in an embodiment of the present invention;

[0043] Figure 5 is a schematic cross-sectional structural diagram of a high-voltage connecting device provided in an embodiment of the present invention;

[0044] Figure 6 yes Figure 5 Schematic diagram of the local enlarged structure at A in the middle;

[0045] The reference numerals in the figures are as follows:

[0046] 1. Elastic conductive plug; 2. High-voltage connector; 3. Conductive core; 4. Connecting sleeve; 5. High-voltage resistor; 6. Conductive cap; 7. Conductive spring; 8. Mounting seat; 9. Lantern pin; 10. Insulating shell; 11. Oil filling channel; 12. First through hole; 13. Second through hole; 14. High-voltage cable sleeve; 15. Third through hole; 16. Fourth through hole; 17. Adjustment chamber; 18. Annular protrusion; 19. Sealing groove; 20. High-voltage cable. DETAILED DESCRIPTION

[0047] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of 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 described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0048] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0049] Some embodiments of the present invention provide a high-voltage power supply device for an electrostatic deflection plate, comprising a high-voltage generator and a high-voltage connection device. The high-voltage generator utilizes high-frequency inversion and soft-switching technology to provide high-voltage power to the electrostatic deflection plate. The high-voltage connection device is specifically designed for the electrostatic deflection plate load, ensuring reliable conductivity while exhibiting high insulation performance. The internal high-voltage matching resistor type can be flexibly adjusted based on actual needs, providing system overcurrent protection that meets requirements. This allows for universal matching resistor installation conditions for electrostatic deflection plates of varying structures and operating conditions.

[0050] Example 1

[0051] like Figure 1 As shown, this embodiment provides a high-voltage power supply device for an electrostatic deflection plate, comprising a high-voltage generator and a high-voltage connection device. The high-voltage generator is used to convert and transmit 380V AC power through high-frequency inversion and soft-switching technology. The high-voltage connection device is connected to the high-voltage generator at one end and to the electrostatic deflection plate at the other end, transmitting the stepped high-voltage power output by the high-voltage generator to the electrostatic deflection plate while ensuring the voltage resistance of the connection.

[0052] Further, if Figure 2As shown, the high-voltage generating device includes an AC-DC rectifier module, several high-frequency inverter modules, several soft-switch modules, several high-frequency isolation transformer modules, several high-voltage switch output modules, and a control module. The power-frequency rectifier module is used to perform power-frequency rectification on the incoming 380V AC power to generate a DC voltage. The high-frequency inverter module and the soft-switch module correspond one-to-one, converting and transmitting the DC voltage to meet the power requirements under different load conditions. The high-frequency isolation transformer modules are connected in series, with their primary sides coupled to the soft-switch modules and their secondary sides coupled to the two high-voltage switch output modules to achieve high-frequency isolation. Each high-voltage switch output module is used to achieve stepped high-voltage energy output. The control module is used to control and adjust the switching frequency of the soft-switch modules and the switching timing of the high-voltage switch output modules according to different load conditions or step requirements.

[0053] Furthermore, in this embodiment, the soft switching module may adopt an LCC resonant converter.

[0054] Furthermore, the high-voltage switch output module includes a rectifier module and a high-frequency filter module, wherein the rectifier module and the high-frequency filter module are respectively used to rectify and filter the high-voltage electric energy output by the high-frequency isolation transformer.

[0055] In this embodiment, using a 250kV power supply as an example, 10 sets of high-frequency inverter modules, soft switch modules, and high-frequency isolation transformer modules are provided, and 20 sets of high-voltage switch output modules are provided. The voltage of a single high-voltage switch output module is only 1.25kV; the normal output of the high-voltage generator is a high-voltage DC source with high stability and strong anti-sparking capability.

[0056] like Figure 3 Figure 2 shows the stepped high-voltage energy waveform of the electrostatic deflection plate, where T1 is the DC boost stage of the deflection plate power supply; T2 is the time period of the deflection plate power supply output change; T3 is the high-voltage drop time, which can be controlled within microseconds based on the response time of the high-voltage switch; T4 is the platform time, which can be adjusted arbitrarily according to needs; N is the energy step, and the number N=T2 / (T3+T4).

[0057] Furthermore, the control module includes a soft switch control module and a high voltage switch control module.

[0058] The soft-switching control module controls the switching frequency of the LCC resonant converter, employing a PSM control method to ensure optimal performance under varying load conditions. For example, under light loads, the switching frequency can be reduced to improve efficiency; under heavy loads, the switching frequency can be increased to meet output power requirements. This enables both high-voltage output conversion and isolation.

[0059] The high-voltage switch control module controls the high-voltage switches in the high-voltage switch output module. For example, by controlling the high-voltage switches in the transformer's downstream stage, it achieves rapid high-voltage changes, enabling step-by-step high-voltage power conversion. The high-voltage power conversion ramp-down time is currently controlled to within microseconds, depending on the response time of the different high-voltage switches. Alternatively, in shutdown mode, each high-voltage switch is sequentially closed according to step requirements, achieving a step-by-step discharge to ensure safety.

[0060] Furthermore, to meet actual needs, the high voltage generating device can generate a voltage of up to several hundred kilovolts, and the voltage resistance at the connection portion between the electrostatic deflection plate and the high voltage connecting device is particularly important.

[0061] like Figure 4 As shown, in this embodiment, the connection portion between the electrostatic deflection plate and the high-voltage connection device is constructed as a cavity inclined upward relative to the vacuum chamber, and a socket for connecting the high-voltage connection device is formed in the cavity.

[0062] Furthermore, if Figure 5 and Figure 6 The figure shows a schematic diagram of the structure of a high-voltage connection device. The high-voltage connection device includes an insulating housing 10, a high-voltage cable 20, a high-voltage resistor 5, a high-voltage connector 2, and an elastic conductive plug 1. An annular protrusion 18 is formed at a preset position on the outer surface of the insulating housing 10, and a sealing groove 19 for mounting a sealing ring is provided on the annular protrusion 18 to achieve a sealed connection between the annular protrusion 18 and the cavity on the electrostatic deflection plate. A cavity is formed inside the insulating housing 10, which is divided into an installation cavity and an adjustment cavity 17 by a partition. A high-voltage cable 20 is installed in the installation cavity, and one end of the high-voltage cable 20 is connected to the high-voltage generator. The other end of the high-voltage cable 20 is electrically connected to the high-voltage resistor 5 set in the adjustment cavity 17 via a welded lantern pin 9. The other end of the high-voltage resistor 5 is plugged into the socket on the electrostatic deflection plate via the high-voltage connector 2 and the elastic conductive plug 1.

[0063] Furthermore, the high-voltage connecting device also includes a stepped connecting sleeve 4, one end of which is inserted into the insulating shell 10 and is detachably sealed and connected to the adjusting chamber 17 on the side close to the high-voltage connector 2; the high-voltage connector 2 is covered on the outside of the other end of the connecting sleeve 4 and is locked to the high-voltage connector 2 through a locking member.

[0064] Preferably, in this embodiment, the connecting sleeve 4 is provided with an external thread, and the regulating chamber 17 is provided with an internal thread, and the two are threadedly connected. Connection holes are provided on the high-pressure connector 2 and the connecting sleeve 4, respectively, and bolts can be used as locking members to connect and lock the high-pressure connector 2 and the connecting sleeve 4. This method can achieve assembly of the high-pressure connecting device.

[0065] Furthermore, a high-voltage cable sleeve 14 is provided at the connection between the high-voltage cable 20 and the high-voltage generating device to keep the high-voltage cable 20 in a fixed shape and prevent damage to the high-voltage cable 20 when frequently plugging and unplugging the high-voltage connecting device.

[0066] Furthermore, the high-voltage resistor 5 is arranged in the adjustment cavity 17 through the mounting seat 8. The mounting seat 8 is made of conductive material (such as copper). Along the length direction of the high-voltage connecting device, one end of the mounting seat 8 is provided with a mounting hole matching the lantern pin 9, and the outer surface of the lantern pin 9 is provided with a similar protruding spring for tight connection with the mounting seat 8; the other end of the mounting seat 8 is formed with a mounting groove, and a conductive spring 7 is provided in the mounting groove. The end of the conductive spring 7 is electrically connected to the high-voltage resistor 5 through a conductive cap 6.

[0067] Furthermore, it should be noted that the various structural parts within the adjustment cavity 17 can be disassembled and replaced, especially through the design of the conductive spring 7, the high-voltage resistor 5 with different resistance values ​​can be flexibly replaced according to actual needs (the sizes of high-voltage resistors with different resistance values ​​are inconsistent), and the conductive spring 7 ensures that the high-voltage resistor 5 is reliably electrically connected.

[0068] Furthermore, a conductive core 3 is arranged between the high-voltage resistor 5 and the high-voltage connector 2, and the outer surface of the conductive core 3 is provided with a stepped protrusion, and a snap-fit ​​groove matching the external protrusion of the conductive core 3 is provided in the high-voltage connector 2, for realizing the snap-fitting of the conductive core 3 and the high-voltage connector 2; the inner surface of the conductive core 3 is also provided with a groove for snapping the high-voltage resistor 5.

[0069] Furthermore, to ensure reliable conductive connection between the conductive core 3 and the high-voltage connector 2, an elastic member is also provided between the conductive core 3 and the high-voltage connector 2. This ensures that the high-voltage resistor 5 is reliably connected between the high-voltage cable 20 and the electrostatic deflection plate.

[0070] Furthermore, the outer surface of the elastic conductive plug 1 is provided with an outwardly protruding spring structure to ensure a reliable connection with the socket. When the high voltage connection device is connected to the electrostatic deflection plate, the elastic conductive plug 1 is plugged into and matched with the socket on the electrostatic deflection plate.

[0071] Furthermore, the cross-sectional area of ​​the portion of the high-voltage connection device that extends into the electrostatic deflection plate cavity is smaller than the cross-sectional area of ​​the cavity. In order to ensure the insulation and voltage resistance performance of the connection portion between the high-voltage connection device and the electrostatic deflection plate socket, after the high-voltage connection device is connected to the electrostatic deflection plate socket, insulating liquid needs to be injected into the cavity and the internal gas needs to be discharged.

[0072] like Figure 5As shown, to facilitate injection of insulating liquid from outside the cavity, the insulating housing 10 is provided with an oil injection channel 11, with both ends of the oil injection channel 11 located on either side of the annular protrusion 18. A first through-hole 12 and a second through-hole 13, communicating with the oil injection channel 11, are provided on the side of the insulating housing 10 away from the annular protrusion 18. The second through-hole 13 is arranged at an angle to facilitate the passage of a pipe from the oil injection channel 11 into the cavity, as well as the injection and extraction of insulating oil from the cavity. The first through-hole 12 serves as a vent. After oil injection, the first and second through-holes 12, 13 are blocked with an insulating plug.

[0073] The portion of insulating housing 10 that extends into the cavity of the electrostatic deflection plate is provided with a third through-hole 15 and a fourth through-hole 16 on its outer surface. These through-holes 15 and 16 are respectively connected to a regulating cavity 17, facilitating the flow of insulating oil into the regulating cavity 17. Third through-hole 15 is located near the mounting cavity.

[0074] Furthermore, oil leakage holes are provided on the groove wall of the mounting groove of the mounting seat 8 to ensure that all parts of the regulating cavity 17 can be completely filled with insulating oil, thereby ensuring the pressure resistance performance of the high-voltage connection device.

[0075] The voltage range of the high-voltage devices involved in this embodiment is 0~250kV. More preferably, the high-voltage power supply device, high-voltage generating device, high-voltage connecting device, high-voltage switch output module, high-voltage cable, high-voltage resistor, high-voltage connector, etc. in this embodiment all adopt 250kV level.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of protection of the claims of the present invention.

Claims

1. A high voltage power supply device for an electrostatic deflection plate, characterized in that: include: High voltage generating device and high voltage connecting device; The high-voltage generating device is used to convert the incoming AC power into electric energy through high-frequency inversion and soft switching technology, and output stepped high-voltage electric energy; One end of the high-voltage connecting device is connected to the high-voltage generating device, and the other end is connected to the electrostatic deflection plate, so as to output the stepped high-voltage electric energy output by the high-voltage generating device to the electrostatic deflection plate, while ensuring the pressure resistance of the connection part; The high-voltage generating device includes an industrial frequency rectifier module, several high-frequency inverter modules, several soft switch modules, several high-frequency isolation transformer modules, several high-voltage switch output modules and a control module; the industrial frequency rectifier module is used to perform industrial frequency rectification on the input alternating current to obtain a direct current voltage; the high-frequency inverter module and the soft switch module correspond one to one and are used to convert the direct current voltage into electrical energy to meet the electrical energy requirements under different load conditions; each of the high-frequency isolation transformer modules is connected in series, and its primary side is coupled with each soft switch module, and its secondary side is coupled with two high-voltage switch output modules to achieve high-frequency isolation; each of the high-voltage switch output modules is used to achieve stepped high-voltage energy output; the control module is used to control and adjust the switching frequency of the soft switch module and the switching timing of the high-voltage switch output module according to different load conditions or step requirements; there are 10 groups of high-frequency inverter modules, soft switch modules and high-frequency isolation transformer modules, and 20 groups of high-voltage switch output modules; A first cavity inclined obliquely upward relative to the vacuum chamber is provided at the connection portion between the electrostatic deflection plate and the high-voltage connection device, wherein a socket for connecting the high-voltage connection device is formed in the first cavity; The high-voltage connection device includes an insulating shell, a high-voltage cable, a high-voltage resistor, a high-voltage connector and an elastic conductive plug; an annular protrusion is formed at a preset position on the outer surface of the insulating shell, and a sealing groove for installing a sealing ring is provided on the annular protrusion to achieve a sealed connection between the annular protrusion and the first cavity on the electrostatic deflection plate; a second cavity is formed inside the insulating shell, and the second cavity is divided into an installation cavity and an adjustment cavity by a partition; a high-voltage cable is provided in the installation cavity, and one end of the high-voltage cable is connected to the high-voltage generating device, and the other end of the high-voltage cable is electrically connected to the high-voltage resistor provided in the adjustment cavity through a welded lantern pin; the other end of the high-voltage resistor is plugged into the socket on the electrostatic deflection plate through the high-voltage connector and the elastic conductive plug; The high-voltage resistor is arranged in the adjustment cavity through a mounting seat. The mounting seat is made of conductive material. Along the length direction of the high-voltage connection device, one end of the mounting seat is provided with a mounting hole matching the lantern pin, and the outer surface of the lantern pin is provided with a spring for tightly connecting with the mounting seat; the other end of the mounting seat is formed with a mounting groove, and a conductive spring is provided in the mounting groove. The end of the conductive spring is electrically connected to the high-voltage resistor through a conductive cap; An oil injection channel is provided on the insulating shell, and the two ends of the oil injection channel are respectively located on both sides of the annular protrusion; a first through hole and a second through hole connected to the oil injection channel are provided on the side of the insulating shell away from the annular protrusion, the first through hole is an exhaust hole, and the second through hole is an inclined hole, which is used to extend from the oil injection channel into the cavity and inject oil into the cavity and extract insulating oil from the cavity; the part of the insulating shell extending into the cavity of the electrostatic deflection plate is provided with a third through hole and a fourth through hole on its outer surface, and the third through hole and the fourth through hole are respectively connected to the adjustment cavity, so as to facilitate the insulating oil in the cavity to flow into the adjustment cavity.

2. A high-voltage power supply device for an electrostatic deflection plate according to claim 1, characterized in that: The high-voltage connecting device also includes a stepped connecting sleeve, one end of which is inserted into the insulating shell and is detachably sealed to the regulating cavity near the high-voltage connector; the high-voltage connector is covered on the outside of the other end of the connecting sleeve and is locked to the high-voltage connector through a locking member.

3. A high voltage power supply device for an electrostatic deflection plate according to claim 1, characterized in that: A conductive core is further provided between the high-voltage resistor and the high-voltage connector; The outer surface of the conductive core is provided with a stepped protrusion, and the high-voltage connector is provided with a snap-fit ​​groove matching the outer protrusion of the conductive core, for achieving snap-fitting between the conductive core and the high-voltage connector; The inner surface of the conductive core is also provided with a groove for clamping the high-voltage resistor.

4. A high voltage power supply device for an electrostatic deflection plate according to claim 3, characterized in that: An elastic member is provided between the conductive core and the high-voltage connector to ensure a reliable connection between the conductive core and the high-voltage connector; The outer surface of the conductive plug is provided with an elastic member for ensuring reliable connection with the socket inside the electrostatic deflection plate.

5. A high voltage power supply device for an electrostatic deflection plate according to claim 1, characterized in that: An oil leakage hole is also provided on the groove wall of the mounting groove of the mounting seat, so as to ensure that all places in the regulating cavity can be completely filled with insulating oil.

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