High-voltage relay air extracting, inflating and sealing device and process thereof

Abstract

The invention discloses a high-voltage relay air extracting, inflating and sealing device and a process thereof, the high-voltage relay air extracting, inflating and sealing device comprises a metal part, an air extracting, inflating and sealing tool, a light-transmitting sheet and a photon welding head, the metal part is provided with a welding feature, and the welding feature is an air extracting and inflating hole communicated with an inner cavity of a high-voltage relay; the air pumping, inflating and sealing tool is provided with an air inlet and outlet pipe, and the air inlet and outlet pipe is connected to the air pumping device and the air inflating device. The light-transmitting sheet is fixedly mounted on the air pumping, inflating and sealing tool; the photon welding head is arranged outside the air pumping and inflating and sealing tool and located on one side of the light-transmitting piece, the photon welding head and the air pumping and inflating hole are oppositely distributed at intervals, and high-energy welding beam flow generated by the photon welding head can penetrate through the light-transmitting piece and is focused on the air pumping and inflating hole. And the metal material around the air pumping and inflating hole is melted and is cooled to block the air pumping and inflating hole so as to realize sealing. According to the invention, the production process flow is greatly simplified, the sealing reliability and the sealing efficiency are obviously improved, and the manufacturing cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high-voltage relays, in particular to a high-voltage relay air extraction and sealing device and a process thereof. BACKGROUND

[0002] As a core control component in the fields of power systems and new energy vehicles, the internal cavity environment of a high-voltage relay directly determines the insulation performance, arc extinguishing capability and service life of the product. In order to ensure the arc extinguishing effect under high-voltage on-off conditions, the internal cavity of the high-voltage relay is usually extracted to a set vacuum degree, then inert protective gas such as nitrogen or argon is filled, and the cavity is permanently sealed to isolate the intrusion of external air and water vapor.

[0003] In the prior art, the air extraction and sealing process of the high-voltage relay cavity generally adopts a technical scheme of "metal tube welding + jaw sealing", and the specific process flow is as follows: first, a metal tube is welded on the magnetic plate of the high-voltage relay, and the metal tube is connected with the internal cavity of the relay; then, the metal tube is connected with an air extraction device and a gas filling device, the internal gas of the cavity is first extracted by the air extraction device to reach the target vacuum degree, and then the protective gas with a preset pressure is filled into the cavity by the gas filling device; after the gas filling is completed, the metal tube is mechanically extruded by a jaw tool to cause plastic deformation and flattening, thereby achieving sealing. In order to further improve the sealing reliability, a secondary welding plugging is required at the jaw position, and finally the sealing operation of the relay cavity is completed.

[0004] However, the above-mentioned traditional process has many technical defects that are difficult to overcome in actual production application, which is embodied in the following aspects: Firstly, the process steps are complicated and the production efficiency is low: the traditional scheme needs to complete multiple processes such as metal tube welding, air extraction and filling, jaw sealing, and secondary welding in sequence, and multiple tool clamps need to be replaced during the process connection, which not only prolongs the production cycle of a single product, but also increases the equipment investment and labor cost of the production line, making it difficult to adapt to large-scale and automated production needs.

[0005] Secondly, the sealing reliability is poor and air leakage is prone to occur: jaw sealing relies on the plastic deformation of the metal tube to achieve closure, and stress concentration is easily generated at the deformation part of the metal tube during this process, forming micro cracks that are difficult to detect with the naked eye; at the same time, the welding area between the metal tube and the magnetic plate of the relay itself has a welding heat affected zone, and the micro defects of the combined surface and the jaw stress are superimposed, which easily leads to sealing failure, causing leakage of protective gas or intrusion of external air, seriously affecting the working stability and service life of the relay.

[0006] Thirdly, the cost control is difficult: the additional metal tube belongs to consumables, and additional welding material is needed, which increases the cost of raw materials and further raises the overall manufacturing cost of the product.

[0007] Therefore, to solve the above problems in the prior art, it has become a technical problem to be solved by those skilled in the art to develop a high-voltage relay air extraction and sealing device and process with simplified process, high sealing reliability and low cost. SUMMARY

[0008] The problem to be solved by the present application is to provide a high-voltage relay air extraction and sealing device and process to overcome the defects of the conventional high-voltage relay air extraction and sealing process, such as complicated process steps, poor sealing reliability and high manufacturing cost.

[0009] The technical scheme adopted by the present application to solve the technical problem is: a high-voltage relay air extraction and sealing device, comprising: a metal component arranged on the high-voltage relay, and at least one welding feature arranged on the metal component, the welding feature being an air extraction hole arranged on the metal component, the air extraction hole being in communication with the internal cavity of the high-voltage relay; an air extraction and sealing tool provided with at least one air inlet and outlet pipe, and the air inlet and outlet pipe being connected to an air extraction device and an air charging device, the air extraction device being used to extract the gas in the internal cavity of the high-voltage relay through the air extraction and sealing tool to achieve a set vacuum degree, and the air charging device being used to charge the protective gas into the internal cavity of the high-voltage relay through the air extraction and sealing tool; a light-transmitting sheet fixedly installed on the air extraction and sealing tool; and a photon welding head arranged outside the air extraction and sealing tool and on one side of the light-transmitting sheet, and being distributed in a spaced-apart and opposite manner with the air extraction hole, the high-energy welding light beam generated by the photon welding head being able to pass through the light-transmitting sheet and focus on the air extraction hole to melt the metal material around the air extraction hole and completely block the air extraction hole after cooling to achieve sealing, so that the internal cavity of the high-voltage relay is in a completely sealed state.

[0010] As a further improvement of the present application, the high-voltage relay comprises a ceramic cover, a magnetic conducting plate, a core shell and a sealing frame sheet, the ceramic cover and the core shell are arranged on the two sides of the magnetic conducting plate respectively, the sealing frame sheet is connected between the ceramic cover and the magnetic conducting plate, and the internal cavity of the high-voltage relay is formed by the ceramic cover, the magnetic conducting plate, the core shell and the sealing frame sheet.

[0011] As a further improvement of the present application, the air pumping and sealing tool is tubular with hollow interior and open ends, the light-transmitting sheet is sealed and fixed to one open end of the air pumping and sealing tool, and the other open end of the air pumping and sealing tool is used to seal and fit to the metal component or the surrounding area of the metal component, so that the air pumping and sealing tool can communicate with the internal cavity of the high-voltage relay through the air pumping hole.

[0012] As a further improvement of the present application, the metal component is the magnetic conducting plate, the air pumping hole penetrates through both sides of the magnetic conducting plate, and the other open end of the air pumping and sealing tool is sealed and fitted to one side of the magnetic conducting plate and covers the air pumping hole.

[0013] As a further improvement of the present application, the metal component is the iron core shell, the iron core shell is cup-shaped, the air pumping hole is arranged on the bottom plate of the bottom of the iron core shell, and the other open end of the air pumping and sealing tool is sealed and fitted to the outer side of the bottom plate and covers the air pumping hole.

[0014] As a further improvement of the present application, the metal component is the sealing frame, one side of the sealing frame horizontally extends outward to form a sealing platform with an internal cavity, the internal cavity of the sealing platform communicates with the internal cavity of the high-voltage relay, the air pumping hole is arranged on the sealing platform, and the other open end of the air pumping and sealing tool is sealed and fitted to the outer side of the sealing platform and covers the air pumping hole.

[0015] As a further improvement of the present application, the metal component is a metal cap, a through hole is arranged on the ceramic cover, the metal cap is welded to the outer side of the ceramic cover and covers the through hole, and the other open end of the air pumping and sealing tool is sealed and fitted to the outer side of the ceramic cover and covers the metal cap.

[0016] As a further improvement of the present application, the air pumping and sealing tool is internally provided with a sealed cavity, and the high-voltage relay is built in the sealed cavity.

[0017] As a further improvement of the present application, the metal component is the magnetic conducting plate, the iron core shell or the sealing frame, and the air pumping hole and the light-transmitting sheet are in opposite distribution on the metal component. Alternatively, the metal component is a metal cap, a through hole is arranged on the ceramic cover, the metal cap is welded to the outer side of the ceramic cover and covers the through hole, and the air pumping hole and the light-transmitting sheet are in opposite distribution on the metal cap.

[0018] This invention also provides a high-voltage relay gas filling and sealing process, based on the high-voltage relay gas filling and sealing device described above, comprising the following steps: S1, providing a high-voltage relay that has completed preliminary assembly; wherein, at least one welding feature is provided on the metal part of the high-voltage relay, the welding feature being an air vent formed on the metal part, the air vent communicating with the internal cavity of the high-voltage relay; S2, the gas filling and sealing fixture is matched with the high-voltage relay; the photonic welding head is positioned outside the gas filling and sealing fixture and on one side of the light-transmitting sheet, and is distributed at intervals relative to the gas filling hole. S3, start the air extraction device, and use the air extraction and sealing tool to extract the gas from the internal cavity of the high-voltage relay. After the set vacuum level is reached, the air extraction device is turned off. S4, start the inflation device and fill the internal cavity of the high-voltage relay with protective gas through the inflation and sealing fixture; after inflation is completed, turn off the inflation device. S5, the photonic welding head generates a high-energy welding beam that passes through the light-transmitting sheet and is focused on the gas extraction hole to melt the metal material around the gas extraction hole and completely seal the gas extraction hole after cooling, thereby achieving a sealing connection and making the internal cavity of the high-voltage relay completely sealed.

[0019] The beneficial effects of this invention are as follows: This invention provides a high-voltage relay gas filling and sealing device and its process. By setting up a metal component with welding features, a gas filling and sealing fixture equipped with inlet and outlet pipes and a light-transmitting plate, and a photon welding head opposite the light-transmitting plate, an integrated technical solution for gas filling and welding sealing is constructed. This allows the vacuuming, protective gas filling, and sealing operations of the internal cavity of the high-voltage relay to be completed continuously within the same fixture, greatly simplifying the production process and reducing equipment investment and labor costs. Furthermore, by specifically setting the welding features as a gas filling hole connecting the internal cavity of the high-voltage relay, this invention enables the gas filling hole to have the dual functions of gas filling channel and welding sealing, eliminating the step of additional welding of metal pipes in the traditional process, reducing material costs and welding steps. By using the photon welding head to focus on the metal material around the gas filling hole for melting and sealing, the gas filling hole can be completely blocked, significantly improving the sealing reliability and sealing efficiency of the internal cavity of the high-voltage relay and reducing manufacturing costs. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the 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 This is a perspective view of a first embodiment of the high-voltage relay gas pumping and sealing device of the present invention; Figure 2 This is a cross-sectional view of Embodiment 1 of the high-voltage relay gas pumping and sealing device of the present invention; Figure 3 This is an exploded view of the magnetic plate and the gas pumping and sealing fixture in Embodiment 1 of the high-voltage relay gas pumping and sealing device of the present invention. Figure 4 This is a flowchart illustrating the steps of the high-voltage relay gas filling and sealing process of the present invention. Figure 5 This is a perspective view of the high-voltage relay in Embodiment 2 of the high-voltage relay gas pumping and sealing device of the present invention; Figure 6 This is a cross-sectional view of Embodiment 2 of the high-voltage relay gas pumping and sealing device of the present invention; Figure 7 This is a perspective view of the high-voltage relay in Embodiment 3 of the high-voltage relay gas pumping and sealing device of the present invention; Figure 8 This is a cross-sectional view of Embodiment 3 of the high-voltage relay gas pumping and sealing device of the present invention; Figure 9 This is a perspective view of the high-voltage relay in Embodiment 4 of the high-voltage relay gas pumping and sealing device of the present invention; Figure 10 This is a cross-sectional view of Embodiment 4 of the high-voltage relay gas pumping and sealing device of the present invention; Figure 11 This is a perspective view of Embodiment 5 of the high-voltage relay gas pumping and sealing device of the present invention; Figure 12 This is a cross-sectional view of Embodiment 5 of the high-voltage relay gas pumping and sealing device of the present invention.

[0022] Referring to the accompanying drawings, the following explanations are provided: 1. Inflation and sealing fixture; 101. Sealed cavity; 102. Inflation pipe; 103. Inflation pipe; 2. Transparent sheet; 3. Ceramic cover; 301. Through hole; 4. Magnetic plate; 401. Boss; 402. Receiving groove; 5. Iron core shell; 501. Base plate; 6. Sealing frame; 601. Sealing platform; 7. Inflation and sealing hole; 8. Metal cap; 9. Flexible sealing element; 10. Fixture cover plate. Detailed Implementation

[0023] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0025] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The illustrations only show the components related to this application and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0026] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0027] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0028] Example 1

[0029] See Figures 1 to 3 The present invention provides a high-voltage relay gas filling and sealing device, comprising: metal parts, gas filling and sealing fixture 1, light-transmitting sheet 2, and photonic welding head.

[0030] In this embodiment, the metal component is disposed on the high-voltage relay and is an inherent part of the high-voltage relay itself, and the metal component has at least one welding feature. Of course, in other embodiments of the present invention, the metal component may also be an additional independent component, which is fixed to the high-voltage relay after subsequent processing (see Embodiment 3 for details).

[0031] Furthermore, the gas extraction, filling and sealing fixture 1 is provided with at least one gas inlet and outlet pipe, and the gas inlet and outlet pipe is connected to the gas extraction device and the gas filling device. The gas extraction device is used to extract the gas in the internal cavity of the high-voltage relay through the gas extraction, filling and sealing fixture 1 to achieve a set vacuum state. The gas filling device is used to fill the internal cavity of the high-voltage relay with a protective gas at a preset pressure through the gas extraction, filling and sealing fixture 1.

[0032] Furthermore, the light-transmitting plate 2 is fixedly mounted on the gas filling and sealing fixture 1, and is spaced relative to the welding features on the metal part, so that the high-energy welding beam generated by the photonic welding head can pass through the light-transmitting plate 2 and be focused on the welding features. The photonic welding head is disposed outside the gas filling and sealing fixture 1 and on one side of the light-transmitting plate 2, and is spaced relative to the welding features (the photonic welding head and the welding features are separated by the light-transmitting plate 2). The high-energy welding beam generated by the photonic welding head can pass through the light-transmitting plate 2 and be focused on the welding features, so as to melt the metal material of the welding features and achieve sealing after cooling, so that the internal cavity of the high-voltage relay is in a completely sealed state.

[0033] This invention constructs an integrated technical solution for vacuuming, filling, and sealing by setting up a metal component with welding features, a vacuuming and sealing fixture 1 equipped with inlet and outlet pipes and a light-transmitting plate 2, and a photonic welding head opposite the light-transmitting plate 2. This allows the vacuuming, protective gas filling, and sealing operations of the internal cavity of the high-voltage relay to be completed continuously within the same fixture, greatly simplifying the production process and reducing equipment investment and labor costs. At the same time, the high-energy welding beam generated by the photonic welding head is focused on the welding feature through the light-transmitting plate 2, melting the welding feature metal material and achieving non-contact precision welding and sealing after cooling. This significantly improves the sealing reliability and sealing efficiency of the internal cavity of the high-voltage relay and reduces manufacturing costs.

[0034] It should be noted that the photonic welding head is not shown in the accompanying drawings of this invention, as it belongs to existing conventional technology. The photonic welding head referred to in this invention includes, but is not limited to, laser welding heads, pulsed xenon lamp high-intensity light welding heads, and other welding head types capable of generating high-energy welding beam streams. The specific structure, working principle, and control method of such photonic welding heads are common knowledge in the relevant technical field, and this invention will not elaborate on them in detail. It only utilizes their conventional function of generating high-energy welding beam streams and achieving precise focused welding to cooperate with the gas pumping and sealing fixture 1 of this invention to complete the sealing operation.

[0035] See Figure 1 The high-voltage relay includes a ceramic cover 3, a magnetic plate 4, an iron core housing 5, and a sealing frame 6. The ceramic cover 3 and the iron core housing 5 are respectively disposed on both sides of the magnetic plate 4, and the sealing frame 6 is connected between the ceramic cover 3 and the magnetic plate 4.

[0036] In this embodiment, before the high-voltage relay is evacuated, filled with protective gas, and sealed, the ceramic cover 3, magnetic plate 4, iron core shell 5, and sealing frame 6 need to be fixedly assembled. Specifically, the bottom of the ceramic cover 3 is welded to the top of the magnetic plate 4 through the sealing frame 6, and the iron core shell 5 is welded to the bottom of the magnetic plate 4. The internal cavity of the high-voltage relay is formed by the ceramic cover 3, magnetic plate 4, iron core shell 5, and sealing frame 6.

[0037] In this embodiment, the metal component is a magnetic plate 4, and the welding feature on the metal component is an air extraction hole 7 opened on the magnetic plate 4, and the air extraction hole 7 is connected to the internal cavity of the high-voltage relay.

[0038] Furthermore, the inflation and sealing fixture 1 is a hollow tube with open ends. The light-transmitting sheet 2 is sealed and fixed to one of the open ends of the inflation and sealing fixture 1. The fixing method can be, but is not limited to, bonding or using fasteners. To ensure sealing, a sealing ring can also be added between the light-transmitting sheet 2 and the inflation and sealing fixture 1.

[0039] like Figure 2 As shown, the gas filling hole 7 extends through the upper and lower sides of the magnetic plate 4. The other open end of the gas filling and sealing fixture 1 is used to seal and adhere to the bottom surface of the magnetic plate 4 and cover the gas filling hole 7, so that the gas filling and sealing fixture 1 can connect to the internal cavity of the high-voltage relay through the gas filling hole 7. The high-energy welding beam generated by the photon welding head passes through the light-transmitting plate 2 and is focused on the gas filling hole 7, thereby melting the metal material around the gas filling hole 7 and completely sealing the gas filling hole 7 after cooling, thus achieving welding sealing.

[0040] This invention employs a magnetic plate 4 as the metal component and specifically sets the welding feature as a gas extraction hole 7 connecting the internal cavity of the high-voltage relay. This allows the gas extraction hole 7 to serve as both a gas extraction channel and a welding seal, eliminating the need for additional metal tube welding in traditional processes and reducing material costs and welding procedures. Simultaneously, by sealing the light-transmitting sheet 2 at one end of the gas extraction and sealing fixture 1, and ensuring the other end of the fixture 1 is tightly fitted to the magnetic plate 4 and covers the gas extraction hole 7, a relatively sealed channel is formed during the gas extraction process, effectively preventing gas leakage and ensuring precise control of vacuum level and protective gas filling amount. The photon welding head focuses on melting and sealing the metal material around the gas extraction hole 7, achieving complete sealing of the gas extraction hole 7 and forming an integrated sealing structure with the magnetic plate 4, further improving the reliability and durability of the sealing of the internal cavity of the high-voltage relay.

[0041] Optionally, there can be one or more air extraction holes 7. When there are multiple holes, it is necessary to ensure that the other open end of the air extraction and sealing fixture 1 can be covered on multiple air extraction holes 7 at the same time, and the air extraction holes 7 can be welded one by one by the photon welding head.

[0042] Preferably, the diameter of the gas filling hole 7 is 0.1~1mm, which can accurately balance the gas filling efficiency of the high-voltage relay and the reliability of welding and sealing, while also taking into account the structural integrity of the metal components. Within this diameter range, the gas filling hole 7 can provide a sufficient channel for gas flow, while reducing the amount of metal material that needs to be melted and sealed. This allows the high-energy welding beam released by the photon welding head to be more accurately focused on the metal area around the gas filling hole 7, achieving rapid melting and cooling to form a dense sealing structure.

[0043] It should be noted that the specific welding parameters of the photon welding head in this invention, including but not limited to welding power, time, spot size, and energy density, can be flexibly determined according to the actual working conditions such as the material properties, material thickness, and structural dimensions of the metal parts to be welded. The selection and matching of the above welding parameters fall within the scope of existing conventional technology in this field. Those skilled in the art can directly adapt suitable parameter combinations based on conventional experimental methods or existing technical data, combined with specific welding requirements. Therefore, they will not be described in detail here.

[0044] Optionally, the forming method of the air hole 7 can be, but is not limited to, stamping, machining, laser penetration, electric drilling, etc.

[0045] Optionally, the material of the magnetic plate 4 can be, but is not limited to, pure iron, 430 stainless iron, or other magnetic base materials.

[0046] Optionally, the light-transmitting sheet 2 in this invention can be a planar transparent lens, a focusing lens, or a lens made of other materials that allow the high-energy welding beam to pass through. When the light-transmitting sheet 2 in this invention is a focusing lens, the high-energy welding beam generated by the photon welding head can be refocused and optimized by utilizing the optical converging characteristics of the focusing lens itself, so that the beam energy is further focused and concentrated, significantly improving the energy density at the focal point, ensuring that the metal material at the welding feature can melt quickly and fully, effectively shortening the welding time and improving the sealing efficiency.

[0047] Optionally, the air inlet and outlet pipes can be configured as one or two. When configured as one, the air inlet and outlet pipes can be divided into two paths by a solenoid valve, which are connected to the air extraction device and the air inflation device respectively, and the air extraction and inflation sequence can be controlled by the solenoid valve.

[0048] In this embodiment, there are two air inlet and outlet pipes, namely the air extraction pipe 102 and the air inflation pipe 103. Both the air extraction pipe 102 and the air inflation pipe 103 are located on the outer peripheral surface of the air extraction, inflation and sealing fixture 1, and both are connected to the interior of the air extraction, inflation and sealing fixture 1. The air extraction pipe 102 is connected to the air extraction device through a solenoid valve, and the air inflation pipe 103 is connected to the air inflation device through another solenoid valve.

[0049] It should be noted that the vacuum pumping device and the gas filling device are not shown in the accompanying drawings of this invention. Conventional vacuum pumping equipment, inert gas filling equipment, and other mature products in the field can be directly selected. The core function of the vacuum pumping device is to provide a negative pressure to extract gas from the internal cavity of the high-voltage relay and the area connected to the sealing fixture 1. The core function of the gas filling device is to fill the above-mentioned areas with a preset type and pressure of protective gas. The specific structure, control logic, and power source configuration of both do not require modification. Therefore, the specific structure of the vacuum pumping device and the gas filling device will not be described in detail here.

[0050] Optionally, the protective gas that the gas filling device fills into the internal cavity of the high-voltage relay can be helium, nitrogen, argon, etc.

[0051] It is worth mentioning that a flexible sealing element 9 is fixed on the other open end of the gas filling and sealing fixture 1. The flexible sealing element 9 can be a sealing ring. The gas filling and sealing fixture 1 is sealed and attached to the bottom surface of the magnetic plate 4 through the flexible sealing element 9 and covers the gas filling hole 7. The flexible sealing element 9 can be adapted to the pressure of the gas filling and sealing fixture 1 under the action of the pressure, which fully fills the gap between the open end of the gas filling and sealing fixture 1 and the bottom surface of the magnetic plate 4, effectively avoiding gas leakage during the gas filling process. This ensures that the vacuum degree can be accurately reached when the internal cavity of the high-voltage relay is evacuated, and the preset pressure and purity can be maintained when the protective gas is filled, laying the foundation for the sealing of the subsequent welding and sealing.

[0052] See Figure 3The bottom surface of the magnetic plate 4 is provided with receiving grooves 402 distributed around the venting hole 7, and a raised boss 401 is formed in the venting hole 7. The boss 401, as the welding melting area, can provide sufficient metal material for sealing the venting hole 7, ensuring that the amount of molten metal during welding is sufficient to completely cover and seal the venting hole 7. At the same time, the raised structure of the boss 401 can make the high-energy welding beam of the photon welding head more accurately focused on the welding target area, reducing the thermal impact of beam scattering on other parts of the magnetic plate 4. The receiving grooves 402 can efficiently accommodate excess molten metal generated during the welding process, avoiding the formation of burrs or accumulation after excess metal overflows, ensuring the flatness of the surface of the magnetic plate 4, and making the metal solidification process in the welding area more controllable, reducing welding defects such as porosity and slag inclusions, forming a denser and stronger sealing structure, ensuring the airtightness of the internal cavity of the high-voltage relay for a long time, and extending the service life of the product.

[0053] See Figure 4 The present invention also provides a high-voltage relay gas extraction and sealing process, which is implemented based on the high-voltage relay gas extraction and sealing device as described in Embodiment 1, including steps S1 to S6.

[0054] S1, a high-voltage relay with preliminary assembly is provided, wherein the bottom of the ceramic cover 3 is welded to the top of the magnetic plate 4 via a sealing frame 6, and the iron core shell 5 is welded to the bottom of the magnetic plate 4. The metal components of the high-voltage relay have at least one welding feature. In this embodiment, the metal component is specifically the magnetic plate 4, and the welding feature is an air vent 7 formed on the magnetic plate 4.

[0055] It should be noted that the high-voltage relay also includes a contact assembly, a push rod assembly, and a core assembly, all of which have been pre-assembled in the internal cavity of the high-voltage relay provided in step S1.

[0056] S2, the gas filling and sealing fixture 1 is used in conjunction with the high-voltage relay. Specifically, the other open end of the gas filling and sealing fixture 1 is sealed to the bottom surface of the magnetic plate 4 by a flexible sealing element 9 and covers the gas filling hole 7; then, the photonic welding head is positioned outside the gas filling and sealing fixture 1 and on one side of the light-transmitting sheet 2, while being spaced apart from the gas filling hole 7. The photonic welding head and the gas filling hole 7 can be coaxially aligned using a fixture to ensure welding accuracy.

[0057] S3, start the air extraction device, and extract the gas from the internal cavity of the high-voltage relay through the air extraction and sealing tool 1 via the air extraction and sealing hole 7. After the set vacuum degree is reached, the air extraction device is turned off.

[0058] S4, start the inflation device, and inject protective gas into the internal cavity of the high-voltage relay through the inflation and sealing tool 1 via the inflation port 7; after the inflation reaches the set pressure, turn off the inflation device.

[0059] In steps S3 and S4, the air extraction pipe 102 and the air filling pipe 103 can be closed by controlling the solenoid valve to ensure the airtightness of the air extraction and filling, sealing tool 1 and the internal cavity of the high-voltage relay.

[0060] S5, start the welding equipment. The photon welding head generates a high-energy welding beam that passes through the light-transmitting plate 2 and is focused on the gas filling hole 7. The metal material around the gas filling hole 7 is melted and completely sealed after cooling, thus achieving welding sealing and making the internal cavity of the high-voltage relay completely sealed.

[0061] S6, remove the gas filling and sealing fixture 1 from the high-voltage relay to complete the gas filling and sealing operation of the high-voltage relay.

[0062] The high-voltage relay gas filling and sealing process of this invention achieves integrated operation of the gas filling and sealing process by providing a high-voltage relay for preliminary assembly, cooperating with the high-voltage relay using a gas filling and sealing tool 1, vacuuming, filling with protective gas, and photonic welding sealing. This significantly shortens the product production cycle, improves the automation level and production efficiency of the production line, and achieves high-quality sealing, completely solving the technical defects of traditional processes such as cumbersome procedures, high cost, and easy leakage.

[0063] Example 2

[0064] The difference from Embodiment 1 is that the metal component in this embodiment is the iron core shell 5, and the welding feature is also the air filling hole 7, but the air filling hole 7 is located on the iron core shell 5.

[0065] Specifically, see Figure 5 and Figure 6 The core housing 5 is cup-shaped, with an internal cavity for accommodating the core assembly of the high-voltage relay. The bottom of the core housing 5 has a base plate 501, and an air injection / filling hole 7 is located on the base plate 501. During operation, the air injection / filling device 1 and the other open end of the sealing fixture 1 are sealed together by a flexible sealing element 9 to the outer side of the base plate 501 and covered by the air injection / filling hole 7.

[0066] The outer shell of the iron core 5 can be made of materials such as stainless steel.

[0067] It is worth mentioning that the outer side of the base plate 501 extends with a protrusion distributed around the venting hole 7. The protrusion serves as the welding melting area and can provide sufficient metal material for sealing the venting hole 7, ensuring that the amount of metal melted during welding is sufficient to completely cover and seal the venting hole 7.

[0068] The difference between the high-voltage relay gas filling and sealing process in this embodiment and that in Embodiment 1 is that, in step S2, the other open end of the gas filling and sealing fixture 1 is sealed and attached to the outer side of the base plate 501 by a flexible sealing element 9 and covers the gas filling hole 7. The remaining steps are the same and will not be repeated.

[0069] In this embodiment, the iron core shell 5 is used as a metal component, and the air injection hole 7 is set on the bottom plate 501 at the bottom of the iron core shell 5. The air injection and sealing fixture 1 is attached to the outer side of the bottom plate 501 and covered by the air injection hole 7. Taking advantage of the relatively flat and spacious structure of the bottom plate 501 of the iron core shell 5, it is easy to tightly fit and disassemble the air injection and sealing fixture 1, which improves the convenience of operation. At the same time, the iron core shell 5 has high structural strength and is not easy to deform after welding and sealing, which can effectively reduce the risk of sealing failure caused by structural deformation, and further ensure the sealing performance and service life of the high voltage relay.

[0070] Example 3

[0071] The difference from Embodiment 1 is that the metal component in this embodiment is a metal cap 8, and the welding feature is also an air inlet 7, but the air inlet 7 is located on the metal cap 8.

[0072] Specifically, see Figure 7 and Figure 8 The top of the ceramic cover 3 has a through hole 301; of course, in some embodiments of the present invention, the through hole 301 may also be provided on the side of the ceramic cover 3. The metal cap 8 is brazed to the outer side of the ceramic cover 3 and covers the through hole 301, and the air extraction / inflation hole 7 is provided on the top of the metal cap 8. During operation, the air extraction / inflation and the other open end of the sealing fixture 1 are sealed and attached to the outer side of the ceramic cover 3 (the area around the metal cap 8) through the flexible sealing member 9 and covered on the metal cap 8.

[0073] Among them, the metal cap 8 can be made of metal materials that can be brazed with ceramics, such as SPCC, 4J33, and 4J42.

[0074] It is worth mentioning that the top of the metal cap 8 extends with a protrusion distributed around the venting hole 7. The protrusion serves as the welding melting area and can provide sufficient metal material for sealing the venting hole 7, ensuring that the amount of metal melted during welding is sufficient to completely cover and seal the venting hole 7.

[0075] The difference between the high-voltage relay gas filling and sealing process in this embodiment and that in Embodiment 1 is that, in step S2, the other open end of the gas filling and sealing fixture 1 is sealed and attached to the outer side of the ceramic cover 3 by a flexible sealing element 9 and placed on the metal cap 8. The remaining steps are the same and will not be repeated.

[0076] This embodiment defines the metal component as a metal cap 8. By opening a through hole 301 in the ceramic cover 3 and welding the metal cap 8 to the outer side of the ceramic cover 3 to cover the through hole 301, a flexible setting method for the air pumping channel is provided. It is especially suitable for high-voltage relay structures with the ceramic cover 3 as the outer shell. The photonic welding head can effectively seal the through hole 301 of the ceramic cover 3 by welding the metal cap 8, forming an integrated sealing structure of the ceramic cover 3 and the metal cap 8, which improves the reliability of the cavity seal.

[0077] Example 4

[0078] The difference from Embodiment 1 is that the metal component in this embodiment is a sealing frame 6, and the welding feature is also an air filling hole 7, but the air filling hole 7 is located on the sealing frame 6.

[0079] Specifically, see Figure 9 and Figure 10 The sealing frame 6 is annular, with a sealing platform 601 extending horizontally outward on one side. The cavity inside the sealing platform 601 connects to the internal cavity of the high-voltage relay. The sealing platform 601 also protrudes horizontally outward from the corresponding side of the ceramic cover 3, thus providing installation space for the gas filling / sealment device 1. The gas filling / sealment hole 7 is located at the top of the sealing platform 601. During operation, the other open end of the gas filling / sealment device 1 is sealed to the top surface of the sealing platform 601 using a flexible sealing element 9 and covers the gas filling / sealment hole 7.

[0080] Among them, the sealing frame 6 can be made of metal materials such as SPCC, 4J33, and 4J42 that can be brazed with ceramics.

[0081] It is worth mentioning that the top of the sealing platform 601 extends with a protrusion distributed around the venting hole 7. The protrusion serves as the welding melting area and can provide sufficient metal material for sealing the venting hole 7, ensuring that the amount of metal melted during welding is sufficient to completely cover and seal the venting hole 7.

[0082] The difference between the high-voltage relay gas filling and sealing process in this embodiment and that in Embodiment 1 is that, in step S2, the other open end of the gas filling and sealing fixture 1 is sealed and attached to the top surface of the sealing platform 601 by a flexible sealing element 9 and covers the gas filling hole 7. The remaining steps are the same and will not be repeated.

[0083] In this embodiment, the metal component is defined as a sealing frame 6, and a sealing platform 601 with an internal cavity is provided extending from one side of the sealing frame 6. The gas extraction and filling hole 7 is set on the sealing platform 601, providing an independent and dedicated operating area for gas extraction, filling and sealing operations. The internal cavity of the sealing platform 601 is connected to the internal cavity of the high-voltage relay, which can ensure the smooth flow of gas during the gas extraction and filling process, improve the efficiency of vacuuming and filling. After welding and sealing, the sealing platform 601 has strong structural stability and can form a solid sealing structure, effectively preventing the leakage of protective gas and the infiltration of outside air.

[0084] Example 5

[0085] The difference between this embodiment and Embodiment 1 is that the inflation and sealing fixture 1 is different.

[0086] Specifically, see Figure 11 and Figure 12 In this embodiment, the gas filling and sealing tool 1 can be, but is not limited to, a box structure, which has a sealed cavity 101 inside, and the high-voltage relay is built into the sealed cavity 101.

[0087] The top of the gas filling and sealing fixture 1 is provided with a fixture cover plate 10, and the light-transmitting sheet 2 is fixed on the fixture cover plate 10. The fixture cover plate 10 can be disassembled to facilitate the handling of the high-voltage relay. To ensure sealing, a sealing ring can be added between the fixture cover plate 10 and the gas filling and sealing fixture 1.

[0088] The high-voltage relay in this embodiment has the same structure as the high-voltage relay in Embodiment 1, also including a ceramic cover 3, a magnetic plate 4, an iron core shell 5, and a sealing frame 6. In this embodiment, the metal component is the magnetic plate 4, and the air vent 7 is opened on the magnetic plate 4, and the air vent 7 is distributed opposite to the light-transmitting sheet 2.

[0089] The high-voltage relay gas filling and sealing process based on this embodiment includes the following steps: S1, a high-voltage relay with preliminary assembly is provided, wherein the bottom of the ceramic cover 3 is welded to the top of the magnetic plate 4 via a sealing frame 6, and the iron core shell 5 is welded to the bottom of the magnetic plate 4. The metal components of the high-voltage relay have at least one welding feature. In this embodiment, the metal component is specifically the magnetic plate 4, and the welding feature is an air vent 7 formed on the magnetic plate 4.

[0090] It should be noted that the high-voltage relay also includes a contact assembly, a push rod assembly, and a core assembly, all of which have been pre-assembled in the internal cavity of the high-voltage relay provided in step S1.

[0091] S2, the gas filling and sealing fixture 1 is assembled with the high-voltage relay. Specifically, the high-voltage relay provided in step S1 is placed in the sealed cavity 101 of the gas filling and sealing fixture 1, and the fixture cover plate 10 is sealed and fixed on the gas filling and sealing fixture 1, while ensuring that the gas filling holes 7 on the magnetic plate 4 are directly opposite the light-transmitting sheet 2. Then, the photonic welding head is positioned outside the gas filling and sealing fixture 1 and on one side of the light-transmitting sheet 2, while being spaced apart from the gas filling holes 7.

[0092] Among them, a fixture can be set inside the gas filling and sealing fixture 1 to initially fix the high-voltage relay.

[0093] S3, start the vacuum device to extract the gas from the sealed cavity 101 of the vacuum filling and sealing fixture 1 and the internal cavity of the high-voltage relay. After the set vacuum level is reached, turn off the vacuum device.

[0094] S4, start the inflation device to fill the sealed cavity 101 of the inflation and sealing fixture 1 and the internal cavity of the high-voltage relay with protective gas; after the inflation reaches the set pressure, turn off the inflation device.

[0095] In steps S3 and S4, the air extraction pipe 102 and the air filling pipe 103 can be closed by controlling the solenoid valve to ensure the airtightness of the air extraction and filling, sealing tool 1 and the internal cavity of the high-voltage relay.

[0096] S5, start the welding equipment. The photon welding head generates a high-energy welding beam that passes through the light-transmitting plate 2 and is focused on the gas filling hole 7. The metal material around the gas filling hole 7 is melted and completely sealed after cooling, thus achieving welding sealing and making the internal cavity of the high-voltage relay completely sealed.

[0097] S6, open the tool cover 10, remove the high-voltage relay, and complete the gas filling and sealing operation of the high-voltage relay.

[0098] This embodiment sets up a sealed cavity 101 inside the gas filling and sealing fixture 1 and embeds a high-voltage relay therein. The vacuuming and protective gas filling operations are completed within the sealed cavity 101 environment of the gas filling and sealing fixture 1. A high-energy welding beam generated by the photon welding head passes through the light-transmitting sheet 2 and is focused on the gas filling hole 7, thereby completely sealing the gas filling hole 7. This can greatly simplify the production process, significantly improve the sealing reliability and sealing efficiency of the internal cavity of the high-voltage relay, and reduce manufacturing costs.

[0099] In addition, in some other embodiments of the present invention, the inflation and sealing fixture 1 is the same as in Embodiment 5, but the metal part can be the iron core shell 5 described in Embodiment 2, the metal cap 8 described in Embodiment 3, or the sealing frame 6 described in Embodiment 4.

[0100] The same or similar parts between the various embodiments in this specification can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments.

[0101] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A high-voltage relay gas filling and sealing device, characterized in that, The application relates to a high-voltage relay and a sealing method thereof. The high-voltage relay comprises a metal part arranged on the high-voltage relay, and at least one welding feature arranged on the metal part, wherein the welding feature is a pumping and charging hole (7) arranged on the metal part, and the pumping and charging hole (7) is communicated with an internal cavity of the high-voltage relay. The pumping and charging sealing tool (1) is provided with at least one gas inlet and outlet pipe connected with a gas pumping device and a gas charging device, wherein the gas pumping device is used for pumping out gas in the internal cavity of the high-voltage relay through the pumping and charging sealing tool (1) to reach a set vacuum degree, and the gas charging device is used for charging protective gas into the internal cavity of the high-voltage relay through the pumping and charging sealing tool (1). A light-transmitting sheet (2) is fixedly arranged on the pumping and charging sealing tool (1). A photon welding head is arranged outside the pumping and charging sealing tool (1) and on one side of the light-transmitting sheet (2), and is distributed in a spaced-apart and opposite manner with the pumping and charging hole (7), wherein a high-energy welding light beam generated by the photon welding head can pass through the light-transmitting sheet (2) and is focused on the pumping and charging hole (7) to melt metal material around the pumping and charging hole (7) and completely seal the pumping and charging hole (7) after cooling to realize sealing, so that the internal cavity of the high-voltage relay is in a completely sealed state.

2. The high voltage relay pump and seal apparatus of claim 1, wherein, The high-voltage relay comprises a ceramic cover (3), a magnetic conducting plate (4), a core shell (5) and a sealing frame sheet (6), the ceramic cover (3) and the core shell (5) are arranged on two sides of the magnetic conducting plate (4) respectively, the sealing frame sheet (6) is connected between the ceramic cover (3) and the magnetic conducting plate (4), and the internal cavity of the high-voltage relay is formed by the ceramic cover (3), the magnetic conducting plate (4), the core shell (5) and the sealing frame sheet (6).

3. The high voltage relay pump and seal apparatus of claim 2, wherein, The pumping and charging sealing tool (1) is hollow and tubular with two open ends, the light-transmitting sheet (2) is fixedly arranged on one open end of the pumping and charging sealing tool (1), and the other open end of the pumping and charging sealing tool (1) is used for being sealed and fitted on the metal part or a surrounding area of the metal part, so that the pumping and charging sealing tool (1) can be communicated with the internal cavity of the high-voltage relay through the pumping and charging hole (7).

4. The high voltage relay pump and seal apparatus of claim 3, wherein, The metal part is the magnetic conducting plate (4), the pumping and charging hole (7) penetrates through two sides of the magnetic conducting plate (4), and the other open end of the pumping and charging sealing tool (1) is sealed and fitted on one side surface of the magnetic conducting plate (4) and covers the pumping and charging hole (7).

5. The high voltage relay pump and seal apparatus of claim 3, wherein, The metal part is the core shell (5), the core shell (5) is cup-shaped, the pumping and charging hole (7) is arranged on a bottom plate (501) of a bottom of the core shell (5), and the other open end of the pumping and charging sealing tool (1) is sealed and fitted on an outer side surface of the bottom plate (501) and covers the pumping and charging hole (7).

6. The high voltage relay pump and seal apparatus of claim 3, wherein, The metal part is the sealing frame piece (6), one side of the sealing frame piece (6) extends outward horizontally to form a sealing platform (601) with a cavity inside, and the cavity inside the sealing platform (601) is communicated with the internal cavity of the high-voltage relay, the gas extraction and charging hole (7) is arranged on the sealing platform (601), and the other open end of the gas extraction and charging tool (1) is sealingly attached to the outer side surface of the sealing platform (601) and covers the gas extraction and charging hole (7).

7. The high voltage relay pump and seal apparatus of claim 3 wherein, The metal part is a metal cap (8), a through hole (301) is formed on the ceramic cover (3), the metal cap (8) is welded to the outer side surface of the ceramic cover (3) and covers the through hole (301), and the other open end of the gas extraction and charging tool (1) is sealingly attached to the outer side surface of the ceramic cover (3) and covers the metal cap (8).

8. The high voltage relay pump and seal apparatus of claim 2, wherein, The gas extraction and charging tool (1) is internally provided with a sealed cavity (101), and the high-voltage relay is arranged in the sealed cavity (101).

9. The high voltage relay pump and seal apparatus of claim 8, wherein, The metal part is the magnetic conductive plate (4), the iron core shell (5) or the sealing frame piece (6), and the gas extraction and charging hole (7) thereon is in opposite distribution with the light-transmitting sheet (2); Or the metal part is a metal cap (8), a through hole (301) is formed on the ceramic cover (3), the metal cap (8) is welded to the outer side surface of the ceramic cover (3) and covers the through hole (301), and the gas extraction and charging hole (7) on the metal cap (8) is in opposite distribution with the light-transmitting sheet (2).

10. A high voltage relay pump and seal process, characterized by, The high-voltage relay gas extraction and charging and sealing device is realized based on any one of claims 1 to 9, comprising the following steps: S1, providing a high-voltage relay which has completed preliminary assembly; wherein at least one welding feature is arranged on a metal part of the high-voltage relay, the welding feature is a gas extraction and charging hole (7) formed on the metal part, and the gas extraction and charging hole (7) is communicated with an internal cavity of the high-voltage relay; S2, cooperating the gas extraction and charging tool (1) with the high-voltage relay; arranging a photonic welding head outside the gas extraction and charging tool (1) and on one side of the light-transmitting sheet (2), and the photonic welding head is in spaced opposite distribution with the gas extraction and charging hole (7); S3, starting the gas extraction device, extracting the gas in the internal cavity of the high-voltage relay through the gas extraction and charging tool (1), and closing the gas extraction device after reaching a set vacuum degree; S4, starting the gas charging device, charging the protective gas into the internal cavity of the high-voltage relay through the gas extraction and charging tool (1); and closing the gas charging device after the gas charging is completed; S5, the photonic welding head generates a high-energy welding light beam which passes through the light-transmitting sheet (2) and is focused on the gas extraction and charging hole (7) to melt the metal material around the gas extraction and charging hole (7) and completely seal the gas extraction and charging hole (7) to realize sealing after cooling, so that the internal cavity of the high-voltage relay is in a completely sealed state.

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