An overvoltage protection system

Abstract

The application discloses a kind of overvoltage protection systems including main body and control, by output electrode assembly and input electrode assembly respectively connected in operating path and discharge path, when operating voltage reaches the protection parameter set, arc discharge is generated between intermediate electrode and output electrode in operating cavity, thereby high voltage is discharged to discharge path, avoid circuit damage, after operating environment occurs adjustment, by control in operating cavity moves, change the distance of output electrode assembly and intermediate electrode, the volume of corresponding insulation arc-extinguishing gas connected in operating channel is also changed, corresponding breakdown discharge voltage also changes accordingly, to achieve the purpose of adaptive regulation breakdown discharge voltage, in high-energy surge and transient voltage event, more quickly and reliably protection regulation can be carried out, avoid repeated disassembly and replacement of protection component operation, improve practicality, reliability is strong.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical protection system, in particular to an overvoltage protection system. BACKGROUND

[0002] The information provided in this section is for the purpose of generally presenting the context of the disclosure. The work of the presently named inventors, to the extent the descriptions are described in this section, as well as aspects of the descriptions that can not otherwise qualify as prior art at the time of filing, are neither expressly nor impliedly admitted as prior art against the present disclosure.

[0003] Discharge tube is a commonly used overvoltage protection element, but the overvoltage protection parameter designed in the application of discharge tube is fixed, and the parameter does not have continuous adjustability. When the overvoltage is lower than the protection parameter, the discharge cannot be normally carried out, and arc discharge cannot be generated at a specific voltage, so that the overhigh voltage cannot be discharged to the ground or other safe path, resulting in damage to the circuit. Especially in high energy surge and transient voltage events, the reliability is poor. SUMMARY

[0004] In view of the defects in the prior art, the present application provides an overvoltage protection system to solve the problem that the overvoltage protection discharge tube in the prior art cannot adaptively adjust the overvoltage protection parameter, resulting in protection failure.

[0005] The above-mentioned purpose of the present application is mainly realized by the following technical scheme:

[0006] An overvoltage protection system, the overvoltage protection system comprises:

[0007] A main body, two ends of the main body are respectively fixedly provided with an output electrode assembly and an input electrode assembly, and the main body is provided with a working cavity communicated between the output electrode assembly and the input electrode assembly, and the main body is provided with a working channel communicated with the working cavity, the working channel is used for connecting and introducing insulating arc-extinguishing gas;

[0008] A control member movably arranged in the working cavity and separating a first space communicated with the working channel, the control member is provided with an intermediate electrode electrically connected with the input electrode assembly, the control member is movable towards the output electrode assembly, and when the control member moves, the distance between the output electrode assembly and the intermediate electrode increases or decreases to change the breakdown discharge voltage.

[0009] In an optional embodiment, the overvoltage protection system further comprises a driving member connected and driving the control member to reciprocally move in the working cavity.

[0010] In an optional embodiment, the driving component includes a first connecting pipe, a second connecting pipe, and an air source. The air source is used to output compressed air to the first connecting pipe or the second connecting pipe. The main body is provided with a first channel and a second channel that are connected to the first connecting pipe and the second connecting pipe, respectively, so that after the compressed gas enters the first channel or the second channel, it pushes the control component to move away from or closer to the output electrode assembly.

[0011] In an optional embodiment, the control element is fixedly provided with a retaining ring arranged between the first channel and the second channel, so that compressed air pushes the retaining ring to move from the first channel or the second channel.

[0012] In an optional embodiment, a reversing valve is provided between the air source and the first connecting pipe and the second connecting pipe, and the reversing valve controls the compressed air to enter the first connecting pipe or the second connecting pipe.

[0013] In an optional embodiment, a plurality of spaced sealing rings are provided between the outer wall of the control component and the inner wall of the main body component.

[0014] In an optional embodiment, the control member is provided with a plurality of through holes so that when the control member reciprocates, the pressure between the end of the control member and the space between the output electrode assembly and the input electrode assembly is the same.

[0015] In an optional embodiment, the plurality of through holes are arranged circumferentially at intervals around the central axis of the control element.

[0016] In an optional embodiment, a detachable positioning part is fixed between the input electrode assembly and the main body, and the main body, the positioning part, and the control component are all made of insulating material.

[0017] In an optional embodiment, the control member is provided with a limiting ring for abutting the intermediate electrode, so that the end of the intermediate electrode protrudes from the end of the control member.

[0018] Compared with the prior art, the advantages of this application are:

[0019] The overvoltage protection system of this application includes a main body and a control component. An output electrode assembly and an input electrode assembly are fixedly mounted at both ends of the main body. A working cavity is provided within the main body, connecting the output and input electrode assemblies. A working channel, communicating with the working cavity, is provided through the main body. The working channel is used to connect to and introduce insulating arc-extinguishing gas. The control component is movably disposed within the working cavity and separated from the first space connected to the working channel. The control component has an intermediate electrode electrically connected to the input electrode assembly. The control component can move towards the output electrode assembly. When the control component moves, the distance between the output electrode assembly and the intermediate electrode increases or decreases to change the breakdown discharge voltage. In actual operation, the output electrode... The component and input electrode assembly are connected to the working path and discharge path respectively. When the working voltage reaches the set protection parameter, an arc discharge is generated between the intermediate electrode and the output electrode in the working cavity, thereby discharging the excessive voltage to the discharge path and preventing circuit damage. After the working environment is adjusted, the distance between the output electrode assembly and the intermediate electrode is changed by moving the control component in the working cavity. Correspondingly, the volume of the insulating arc-extinguishing gas connected in the working channel also changes, and the corresponding breakdown discharge voltage also changes accordingly. This achieves the purpose of adaptively adjusting the breakdown discharge voltage. In high-energy surge and transient voltage events, protection adjustment can be performed faster and more reliably, avoiding repeated disassembly and replacement of protection components, improving practicality and reliability. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of an overvoltage protection system is provided for an embodiment of this application;

[0022] Figure 2 An assembly sectional view of the main body is provided for the embodiments of this application;

[0023] Figure 3 A cross-sectional view of the main component is provided for the embodiments of this application;

[0024] Figure 4 A cross-sectional view of the control component is provided for an embodiment of this application;

[0025] In the diagram: 100, main body; 101, working channel; 102, first channel; 103, second channel; 104, output electrode assembly; 105, input electrode assembly; 200, control component; 201, first space; 202, intermediate electrode; 203, retaining ring; 301, first connecting pipe; 302, second connecting pipe; 303, reversing valve; 304, air source; 401, sealing ring; 402, through hole; 403, positioning part; 404, limiting ring. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that the description of these embodiments is intended to aid in understanding the invention, but does not constitute a limitation thereof. The specific structural and functional details disclosed herein are merely for describing exemplary embodiments of the invention. However, the invention can be embodied in many alternative forms and should not be construed as being limited to the embodiments described herein.

[0027] like Figure 1 , Figure 2 As shown, Figure 1 A schematic diagram of an overvoltage protection system is provided for an embodiment of this application. Figure 2 This application provides an assembly sectional view of the main body 100 for an embodiment of the present application, an overvoltage protection system, the overvoltage protection system including the main body 100 and the control component 200, wherein:

[0028] like Figure 1 , Figure 2 As shown, the main body 100 has an output electrode assembly 104 and an input electrode assembly 105 fixedly installed at both ends, and the main body 100 has a working cavity communicating between the output electrode assembly 104 and the input electrode assembly 105. The two ends of the main body 100 are connected to the working path and the discharge path through the output electrode assembly 104 and the input electrode assembly 105, respectively. The working cavity is connected between the output electrode assembly 104 and the input electrode assembly 105 to provide a discharge space for the electric arc and maintain stable operation.

[0029] like Figure 1 , Figure 2 As shown, the main body 100 is provided with a working channel 101 that communicates with the working cavity. The working channel 101 is used to connect and introduce insulating arc-extinguishing gas. One end of the working channel 101 can be configured to be sealed after the insulating arc-extinguishing gas is input, or it can be configured to form a seal through the output end of the insulating arc-extinguishing gas to maintain reliability during operation.

[0030] Insulating arc-extinguishing gases are gases used to insulate and extinguish electric arcs. They ensure electrical safety during operations such as opening and closing circuits, preventing short circuits or fires caused by arcs. In practice, sulfur hexafluoride (SF6), dry air, or a mixture of SF6 with nitrogen and carbon dioxide can be used. SF6 is a colorless, odorless, and non-toxic gas with extremely strong electrical insulation and arc-extinguishing properties. Dry air, having had moisture removed, has better insulation properties than humid air. Mixing gases can also reduce the amount of SF6 used, mitigating environmental impact.

[0031] like Figure 1 , Figure 2 As shown, the control component 200 is movably disposed within the working cavity and separated from the first space 201 connected to the working channel 101. The control component 200 is provided with an intermediate electrode 202 electrically connected to the input electrode assembly 105. The control component 200 can move toward the output electrode assembly 104, and when the control component 200 moves, the distance between the output electrode assembly 104 and the intermediate electrode 202 increases or decreases to change the breakdown discharge voltage.

[0032] The control unit 200 can reciprocate within the working cavity, and the intermediate electrode 202 on the control unit 200 also reciprocates synchronously. The intermediate electrode 202 always remains electrically connected to the input electrode assembly 105. Specifically, a flexible cable can be used for connection, so that the flexible deformation of the flexible cable can adapt to the synchronous movement of the intermediate electrode 202, and always maintain the state of electrical connection between the intermediate electrode 202 and the input electrode assembly 105 when the control unit 200 moves to different positions.

[0033] As the control unit 200 shifts overall, the distance between the output electrode assembly 104 and the intermediate electrode 202 increases or decreases. After the distance between the output electrode assembly 104 and the intermediate electrode 202 changes, the insulating arc-extinguishing gas introduced through the working channel 101 remains between the output electrode assembly 104 and the intermediate electrode 202. Consequently, when the distance between the output electrode assembly 104 and the intermediate electrode 202 changes, the corresponding volume of the insulating arc-extinguishing gas between the output electrode assembly 104 and the intermediate electrode 202 also changes, thus completing the change of the breakdown discharge voltage under this state. This achieves the purpose of continuous adjustment of the overload protection parameters. Furthermore, by referring to the relationship between the breakdown discharge voltage value and the distance between the output electrode assembly 104 and the intermediate electrode 202 under this premise, the breakdown discharge voltage value can be precisely controlled and adjusted quickly by adjusting the distance between the output electrode assembly 104 and the intermediate electrode 202.

[0034] In an optional embodiment, the overvoltage protection system of this application operates as follows: The overvoltage protection system includes a main body 100 and a control component 200. Output electrode assembly 104 and input electrode assembly 105 are fixedly mounted at both ends of the main body 100, respectively. A working cavity is provided within the main body 100, connecting the output electrode assembly 104 and the input electrode assembly 105. A working channel 101, communicating with the working cavity, is provided through the main body 100. The working channel 101 is used to connect to and introduce insulating arc-extinguishing gas. The control component 200 is movably disposed within the working cavity and separated from a first space 201 connected to the working channel 101. The control component 200 is provided with an intermediate electrode 202 electrically connected to the input electrode assembly 105. The control component 200 can move towards the output electrode assembly 104, and when the control component 200 moves, the output electrode assembly 104 and the intermediate electrode 202... The distance between 02 is increased or decreased to change the breakdown discharge voltage. In actual operation, the output electrode assembly 104 and the input electrode assembly 105 are connected to the working path and the discharge path respectively. When the working voltage reaches the set protection parameter, an arc discharge is generated between the intermediate electrode 202 and the output electrode in the working cavity, thereby discharging the excessive voltage to the discharge path and avoiding circuit damage. After the working environment is adjusted, the control component 200 moves in the working cavity to change the distance between the output electrode assembly 104 and the intermediate electrode 202. The volume of the insulating arc-extinguishing gas connected in the working channel 101 is also changed accordingly, and the breakdown discharge voltage is also changed accordingly. This achieves the purpose of adaptively adjusting the breakdown discharge voltage. In high-energy surge and transient voltage events, protection adjustment can be performed faster and more reliably, avoiding repeated disassembly and replacement of protection components, improving practicality and reliability.

[0035] like Figure 1 , Figure 2 As shown, in an optional embodiment, the overvoltage protection system further includes a drive component, which connects to and drives the control component 200 to reciprocate within the working cavity. Correspondingly, by controlling the drive component and driving the control component 200 to move within the working cavity, the overall integrity of the main body 100 and the ease of operation of the control component 200 are maintained.

[0036] like Figure 1 , Figure 2 as well as Figure 3 As shown, Figure 3A cross-sectional view of the main body 100 is provided for an embodiment of this application. In an optional embodiment, the driving component includes a first connecting pipe 301, a second connecting pipe 302, and an air source 304. The air source 304 is used to output compressed air to the first connecting pipe 301 or the second connecting pipe 302. The main body 100 is provided with a first channel 102 and a second channel 103 that are connected to the first connecting pipe 301 and the second connecting pipe 302, respectively, so that after the compressed gas enters the first channel 102 or the second channel 103, it pushes the control component 200 to move away from or closer to the output electrode assembly 104.

[0037] Specifically, the compressed air output from the air source 304 is guided to the first connecting pipe 301 or the second connecting pipe 302. When the compressed air enters the first channel 102 through the first connecting pipe 301, it enters the working cavity and pushes the control component 200 to move in the first direction. When the compressed air enters the second channel 103 through the second connecting pipe 302, it enters the working cavity and pushes the control component 200 to move in the second direction. When the control component 200 moves in the first or second direction, the intermediate electrode 202 on the control component 200 moves closer to or further away from the output electrode assembly 104.

[0038] like Figure 2 , Figure 4 As shown, Figure 4 A cross-sectional view of the control element 200 is provided for an embodiment of this application. In an optional embodiment, a retaining ring 203 is fixedly provided on the control element 200 and disposed between the first channel 102 and the second channel 103, so that compressed air pushes the retaining ring 203 to move within the first channel 102 or the second channel 103.

[0039] To ensure the control element 200 moves stably in either the first or second direction, a retaining ring 203 is provided on the control element 200. The first channel 102 and the second channel 103 extend to both sides of the retaining ring 203, ensuring that the limit position of the control element 200's movement is always between the first channel 102 and the second channel 103. This ensures the retaining ring 203 is always positioned between the first and second channels 102, effectively maintaining the relative independence of the first and second channels 103 during operation. This prevents the movement of the retaining ring 203 from causing communication between the first and second channels 102 and 103, allowing compressed air to stably enter both sides of the retaining ring 203 from either the first or second channel 102. This improves the stability of the control element 200's operation and enhances control accuracy.

[0040] like Figure 1 , Figure 2As shown, in an optional embodiment, a reversing valve 303 is provided between the air source 304 and the first connecting pipe 301 and the second connecting pipe 302, and the reversing valve 303 controls the compressed air to enter the first connecting pipe 301 or the second connecting pipe 302.

[0041] A reversing valve 303 is provided between the air source 304 and the first connecting pipe 301 and the second connecting pipe 302. The reversing valve 303 is connected to both the first connecting pipe 301 and the second connecting pipe 302. Under the operation of the reversing valve 303, the compressed air can be output towards the first connecting pipe 301 or the second connecting pipe 302. Thus, while maintaining a stable output from the air source 304, the output direction of the compressed air can be switched, thereby conveniently completing the control operation of the displacement direction of the control component 200.

[0042] like Figure 2 , Figure 4 As shown, in an optional embodiment, a plurality of spaced sealing rings 401 are provided between the outer wall of the control member 200 and the inner wall of the main body member 100.

[0043] Multiple sealing rings 401 improve the operational sealing between the control component 200 and the main body 100 during movement. To improve the effectiveness of the sealing rings 401, sealing rings 401 can be set at both ends of the control component 200 to seal the areas at both ends of the control component 200. In addition to setting a retaining ring 203, sealing rings 401 can also be set on the retaining ring 203 to improve the sealing performance, so that the space connected to the working channel 101, the space connected to the first channel 102, and the space connected to the second channel 103 are independent and sealed respectively.

[0044] like Figure 2 , Figure 4 As shown, in an optional embodiment, the control member 200 is provided with a plurality of through holes 402 so that when the control member 200 reciprocates, the pressure in the space between the end of the control member 200 and the output electrode assembly 104 and the input electrode assembly 105 is the same.

[0045] When the control component 200 is arranged, it forms a partition in the working space and creates relative spaces on both sides of the control component 200. Through the through hole 402, the relative spaces on both sides of the control component 200 can be connected. As the control component 200 moves back and forth, the insulating arc-extinguishing gas in the working space flows back and forth through the through hole 402, thereby reducing the pressure difference between the relative spaces on both sides of the control component 200, reducing the difficulty of moving the control component 200, and maintaining the precise controllability and smoothness of the control component 200 during adjustment and movement.

[0046] likeFigure 2 , Figure 4 As shown, in an optional embodiment, the plurality of through holes 402 are arranged circumferentially at intervals around the central axis of the control member 200.

[0047] The even distribution and smoother flow of insulating arc-extinguishing gas improve the reliability of the 200-stage control unit's drive operation.

[0048] like Figure 2 , Figure 4 As shown, in an optional embodiment, a detachable positioning part 403 is fixed between the input electrode assembly 105 and the main body 100. The main body 100, the positioning part 403 and the control component 200 are respectively made of insulating material to maintain the insulation of the fixed base of the input electrode assembly 105, the output electrode assembly 104 and the intermediate electrode 202, improve the discharge stability and avoid uncontrollable conductive accidents.

[0049] like Figure 2 , Figure 4 As shown, in an optional embodiment, the control member 200 is provided with a limiting ring 404 for supporting the intermediate electrode 202, so that the end of the intermediate electrode 202 protrudes from the end of the control member 200. When installing the intermediate electrode 202, the limiting ring 404 maintains the assembly stability of the intermediate electrode 202 and prevents the intermediate electrode 202 from falling off during reciprocating operation. Correspondingly, the limiting ring 404 is located between the intermediate electrode 202 and the input electrode assembly 105, and is connected to the intermediate electrode 202 by a flexible cable, which further increases the constraint and restriction on the intermediate electrode 202 and prevents the intermediate electrode 202 from falling off during the repeated movement of the control member 200.

[0050] It is worth noting that the limiting ring 404 causes the end of the intermediate electrode 202 to protrude beyond the end of the control member 200, which allows the end of the intermediate electrode 202 to discharge onto the output electrode assembly 104 with the protruding part when an arc discharge operation occurs, thereby improving the discharge stability.

[0051] It should be understood that the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. Although the terms "first," "second," etc., may be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another. For example, a first unit may be referred to as a second unit, and similarly, a second unit may be referred to as a first unit, without departing from the scope of the exemplary embodiments of the invention.

[0052] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" in this article describes another relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after it are in an "or" relationship.

[0053] It should be understood that in the description of this invention, the terms "upper," "vertical," "inner," "outer," etc., indicate the orientation or positional relationship as commonly placed when the disclosed product is used, or the orientation or positional relationship commonly understood by those skilled in the art. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0054] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" 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 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 invention based on the specific circumstances.

[0055] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments of the invention. As used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” “containing,” and / or “including” as used herein specify the presence of the stated features, integers, steps, operations, units, and / or components, and do not exclude the presence or addition of one or more other features, quantities, steps, operations, units, components, and / or combinations thereof.

[0056] Specific details are provided in the following description to provide a complete understanding of the exemplary embodiments. However, those skilled in the art will understand that the exemplary embodiments can be implemented without these specific details. In other embodiments, well-known processes, structures, and techniques may be omitted in the depiction of non-essential details to avoid obscuring the exemplary embodiments.

[0057] The above are merely specific embodiments of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

[0058] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art.

Claims

1. An overvoltage protection system, characterized in that, The overvoltage protection system includes: The main body has an output electrode assembly and an input electrode assembly fixedly mounted at both ends, and a working cavity is provided inside the main body to connect the output electrode assembly and the input electrode assembly. A working channel is provided through the main body to connect to and pass through the working cavity. The working channel is used to connect to and pass through insulating arc-extinguishing gas. A control component is movably disposed within the working cavity and separates a first space connected to the working channel. The control component is provided with an intermediate electrode electrically connected to the input electrode assembly. The control component can move toward the output electrode assembly, and when the control component moves, the distance between the output electrode assembly and the intermediate electrode increases or decreases to change the breakdown discharge voltage. A driving component is provided, which connects to and drives the control component to reciprocate within the working cavity. The driving component includes a first connecting pipe, a second connecting pipe, and an air source. The air source is used to output compressed air to the first connecting pipe or the second connecting pipe. The main body is provided with a first channel and a second channel respectively connected to the first connecting pipe and the second connecting pipe, so that after the compressed gas enters the first channel or the second channel, it pushes the control component to move away from or towards the output electrode assembly. A retaining ring is fixedly provided on the control component and arranged between the first channel and the second channel, so that the compressed air pushes the retaining ring to move from the first channel or the second channel.

2. The overvoltage protection system as described in claim 1, characterized in that: A reversing valve is provided between the air source and the first connecting pipe and the second connecting pipe, and the reversing valve controls the compressed air to enter the first connecting pipe or the second connecting pipe.

3. The overvoltage protection system as described in claim 1, characterized in that: Multiple sealing rings are provided between the outer wall of the control component and the inner wall of the main body component.

4. The overvoltage protection system as described in claim 1, characterized in that: The control component has multiple through holes so that when the control component reciprocates, the pressure between the end of the control component and the space between the output electrode assembly and the input electrode assembly is the same.

5. The overvoltage protection system as described in claim 4, characterized in that: The plurality of through holes are arranged circumferentially at intervals around the central axis of the control element.

6. The overvoltage protection system as described in claim 1, characterized in that: A detachable positioning part is fixed between the input electrode assembly and the main body, and the main body, the positioning part, and the control component are all made of insulating material.

7. The overvoltage protection system as described in claim 1, characterized in that: The control component is provided with a limiting ring for supporting the intermediate electrode, so that the end of the intermediate electrode protrudes from the end of the control component.

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