Multi-path switching module structure based on high-voltage vacuum relay

Abstract

The invention provides a multi-path switching module structure based on high-voltage vacuum relays, which is arranged in an internal space formed by assembling a shell and side plates, and comprises a metal base, a plurality of high-voltage vacuum relays arranged in two rows, a long PCB (printed circuit board), a short PCB, a high-voltage output connector and a high-voltage pulse input interface on the front side of the shell which are sequentially connected from bottom to top, the metal base is arranged on a bottom plate of the shell, control coils connected with the high-voltage vacuum relays are arranged at the inwards-concave positions of the bottom of the metal base, two wires are led out of the tops of the high-voltage vacuum relays, one wire is connected with the long PCB, and the other wire is connected with the short PCB. The short PCB is connected with the high-voltage output connector, the high-voltage output connector extends out of an opening in the top of the shell, and the long PCB is connected with the high-voltage pulse input interface through a high-voltage wire. The device has the advantages that the modular integrated design is adopted, the manufacturing efficiency and safety are improved, installation and debugging are convenient, and the pulse distortion degree is reduced.

Description

Technical Field

[0001] The present invention relates to the field of pulse power control technology, and in particular to a multi-way switching module structure based on a high-voltage vacuum relay, which is applied to irreversible electroporation (IRE) treatment of tumors and suitable for multi-channel time-sharing pulse distribution under high voltage (≥10kV) and narrow pulse width (≤1μs) conditions. Background Art

[0002] High-voltage pulsed electric fields, a new minimally invasive interventional therapy energy platform, have been widely used for tumor ablation based on the principle of irreversible electroporation (IRE). Conventional IRE devices require electrodes to direct energy into the tumor area. Larger tumors require multiple electrode needles, with discharges between them forming overlapping areas to cover the tumor. Within the IRE device, a single pulse is converted into multiple pulsed electric fields via a multi-channel switching module. High voltages and short pulse widths place stringent demands on the switching module, requiring both high insulation voltage and a compact structure to minimize stray parameters. Summary of the Invention

[0003] The purpose of the present invention is to provide a multi-way switching module structure based on a high-voltage vacuum relay, which adopts a modular integrated design, improves manufacturing efficiency and safety, facilitates installation and debugging, and reduces pulse distortion.

[0004] In order to achieve the above object, the present invention is implemented through the following technical solutions: A multi-way switching module structure based on a high-voltage vacuum relay is arranged in an internal space assembled from a housing and side panels. It includes a metal base connected sequentially from bottom to top, a number of high-voltage vacuum relays arranged in two rows, a long PCB board, a short PCB board, a high-voltage output connector, and a high-voltage pulse input interface on the front side of the housing. The metal base is arranged on the bottom plate of the housing. The control coil connected to each high-voltage vacuum relay is arranged in a recessed area at the bottom of the metal base. The control coil is powered by a socket provided on the metal base. Two wires are led out from the top of the high-voltage vacuum relay, one connected to the long PCB board and the other connected to the short PCB board. The short PCB board is connected to the high-voltage output connector, and the high-voltage output connector extends out of the top opening of the housing. The long PCB board is connected to the high-voltage pulse input interface via a high-voltage wire. After any two of the high-voltage vacuum relays conduct electricity, output is output from any two of the high-voltage output connectors.

[0005] Furthermore, the side panels are configured as a Permalloy interlayer, and the outer shell is provided with a Permalloy interlayer for absorbing spatial electromagnetic fields.

[0006] Further, a plurality of springs are arranged uniformly between the shell bottom plate and the metal base to absorb mechanical vibration energy transmitted from outside, thereby enhancing stability.

[0007] Further, the PCB long plate is coated with a Perrenin-C coating layer, and the PCB short plate is coated with a Perrenin-C coating layer, to eliminate weak points on the high-voltage creepage path, thereby improving insulation and safety.

[0008] Compared with the prior art, the present application has the following advantages: The multi-path switching module structure based on the high-voltage vacuum relay has the advantages of modular integrated design, improved manufacturing efficiency and safety, convenient installation and debugging, reduced pulse distortion degree through impedance matching of the PCB, improved electromagnetic shielding and anti-interference ability of the structure due to the attached permalloy interlayer of the shell and the side plate, and sufficient absorption of external mechanical vibration energy between the shell bottom and the metal base to avoid mechanical damage caused by vibration.

[0009] Specifically, the shell is designed with a composite shielding layer to improve the reliability of the structure, reduce the risk of magnetic field / electric field coupling interference on the control coil, ensure accurate execution of the attraction / disconnection signal and suppression of radiation noise generated by contact bounce, and avoid logic circuit misjudgment. The shielding layer blocks high-frequency interference from invading the low-voltage control end, protects the circuit, reduces external transient overvoltage through radiation coupling to the contact, and reduces electrical erosion. In addition, the PCB is coated with a Perrenin-C coating layer (avoiding the pad area) to eliminate weak points on the high-voltage creepage path, improve insulation and safety, and integrate the connection between high-voltage vacuum relays, thereby improving manufacturing efficiency and structural stability. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is a schematic diagram of the internal structure of the present application.

[0011] Figure 2 is a schematic diagram of the structure of the present application.

[0012] Figure 3 is a schematic diagram of the structure of the present application.

[0013] Reference signs: 1, shell; 2, side plate; 3, metal base; 4, high-voltage vacuum relay; 5, PCB long plate; 6, PCB short plate; 7, high-voltage output connector; 8, high-voltage pulse input interface; 9, socket; 10, spring. DETAILED DESCRIPTION

[0014] The embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0015] A multi-path switching module structure based on a high-voltage vacuum relay, as shown in Figure 1 、 2 As shown, it is located in the internal space assembled by the shell 1 and the side panel 2, including a metal base 3 connected in sequence from bottom to top, a number of high-voltage vacuum relays 4 arranged in two rows, a PCB long board 5, a PCB short board 6, a high-voltage output connector 7 and a high-voltage pulse input interface 8 on the front side of the shell 1. The metal base 3 is located on the bottom plate of the shell 1, as shown in FIG. Figure 3 As shown, the control coils connected to the various high-voltage vacuum relays 4 are arranged in the concave portion at the bottom of the metal base 3. The control coils are powered by a socket 9 provided on the metal base 3. Two wires are led out from the top of a single high-voltage vacuum relay 4, one connected to a long PCB board 5 and the other connected to a short PCB board 6. The short PCB board 6 is connected to a high-voltage output connector 7, and the high-voltage output connector 7 extends out of the top opening of the housing 1. The short PCB board 6 is provided with a screw hole. The bolt structure at the end of the high-voltage output connector 7 is screwed to the short PCB board 6 via a nut. The long PCB board 5 is connected to the high-voltage pulse input interface 8 via a high-voltage wire. After any two of the high-voltage vacuum relays 4 conduct electricity, output is obtained from any two of the high-voltage output connectors 7. Furthermore, the high-voltage vacuum relays 4 are in a plurality and arranged in two rows on the metal base 3. Preferably, the number of high-voltage vacuum relays 4 in a single row is six, the two long PCB boards 5 are respectively arranged above the single-row high-voltage vacuum relays 4, then the high-voltage pulse input interfaces 8 are also two and are respectively connected to the two long PCB boards 5 through high-voltage wires, the six short PCB boards 6 are connected and fixed to the high-voltage output connector 7 through bolts and nuts, then the high-voltage output connectors 7 are also six and respectively extend out of the top opening of the housing 1.

[0016] The side panels 2 are configured as a Permalloy interlayer, and the housing 1 is additionally provided with a Permalloy interlayer for absorbing spatial electromagnetic fields.

[0017] A plurality of springs 10 are evenly arranged between the bottom plate of the housing 1 and the metal base 3 to absorb mechanical vibration energy transmitted from the outside, thereby enhancing stability.

[0018] The surface of the PCB long board 5 is coated with a Parylene-C coating, and the surface of the PCB short board 6 is coated with a Parylene-C coating, so as to eliminate weak points on the high-voltage creepage path, thereby improving insulation and safety.

[0019] The working principle of the application is that high-voltage pulse waves are input to two PCB long plates 5 through high-voltage wires from two parallel high-voltage pulse input interfaces 8, the high-voltage vacuum relays 4 are paired two by two, the outgoing wires of a single high-voltage vacuum relay 4 are two, one is connected to the PCB long plate 5 and the other is connected to the PCB short plate 6, and when any two of the high-voltage vacuum relays 4 are conductive, they are output from any two of the high-voltage output connectors 7, that is, two by two output. When it is necessary to superimpose field quantities and output multiple paths, after any two high-voltage vacuum relays 4 are turned on, the output field quantity is increased through the two high-voltage output connectors 7 connected, and the output is gradually superimposed in multiples of 2, realizing high-voltage high-energy output, which is not only convenient to operate, but also safe and efficient.

[0020] The above is only the preferred embodiment of the application, and it should be pointed out that for ordinary skilled persons in the art, several improvements and refinements can be made without departing from the concept of the application, and these improvements and refinements should also be considered within the protection scope of the application.

Claims

1. A multi-way switching module structure based on a high-voltage vacuum relay, arranged in an internal space assembled by a housing and side panels, characterized by: The invention comprises a metal base connected sequentially from bottom to top, a plurality of high-voltage vacuum relays arranged in two rows, a long PCB, a short PCB, a high-voltage output connector, and a high-voltage pulse input interface on the front side of the housing. The metal base is arranged on the bottom plate of the housing. The control coil connected to each high-voltage vacuum relay is arranged in the concave part of the bottom of the metal base. The control coil is powered by a socket provided on the metal base. Two wires are led out from the top of the high-voltage vacuum relay, one connected to the long PCB and the other connected to the short PCB. The short PCB is connected to the high-voltage output connector, and the high-voltage output connector extends out of the top opening of the housing. The long PCB is connected to the high-voltage pulse input interface via a high-voltage wire. When any two of the high-voltage vacuum relays conduct electricity, output is output from any two of the high-voltage output connectors.

2. A multi-way switching module structure based on a high-voltage vacuum relay according to claim 1, characterized in that: The side panels are provided with a Permalloy interlayer, and the outer shell is provided with a Permalloy interlayer for absorbing the electromagnetic field in space.

3. The multi-way switching module structure based on a high-voltage vacuum relay according to claim 2, characterized in that: A plurality of springs are evenly arranged between the bottom plate of the shell and the metal base to absorb mechanical vibration energy transmitted from the outside, thereby enhancing stability.

4. The multi-way switching module structure based on a high-voltage vacuum relay according to claim 1, characterized in that: The surface of the long PCB board is coated with a Parylene-C coating, and the surface of the short PCB board is coated with a Parylene-C coating, so as to eliminate weak points on the high-voltage creepage path, thereby improving insulation and safety.

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