Electron tube grid leading-out disc and electron tube

Abstract

The utility model relates to the technical field of electronic components, in particular to an electronic tube grid leading-out disc and an electronic tube, which comprises an annular disc body and a kovar alloy welding ring, and the annular disc body is provided with a disc surface and an outer wall perpendicular to the disc surface; the kovar alloy welding ring is of an annular cover-shaped structure and comprises a radial annular section and an axial annular section, and the outer edge of the radial annular section vertically extends towards one side of the annular disc body to form the axial annular section; the inner diameter of the axial annular section is larger than the diameter of the disc body, and the inner surface of the radial annular section is tightly connected with the top disc face of the disc body so that the kovar welding ring can be arranged on the outer edge of the disc body in a sealing and covering mode. By arranging the kovar alloy welding ring, the overall strength and the sealing performance of the annular disc body are improved, and the risks of damage and air leakage of the grid electrode leading-out disc are reduced, so that the stability of the electron tube is improved, and the service life of the electron tube is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic components, in particular to an electron tube grid lead-out plate and an electron tube. Background Art

[0002] The electron tube is a high vacuum device. The grid lead is an important component of the electron tube. It is an important control and input terminal of the electron tube. At the same time, it is part of the vacuum seal of the electron tube, so its strength and sealing are particularly important. The existing grid lead assembly is usually processed by one-piece machining with metal nickel. Although this method is simple, it is easy to cause the following problems during processing and use: the strength of the material is easily damaged during the processing, resulting in a decrease in the yield rate of the product and an increase in cost. In addition, the one-piece machining during use may also cause the performance of the parts to deteriorate in a high-temperature and high-frequency working environment. In particular, when the grid lead assembly is welded to the anode lead end by argon arc welding, it is easy to cause thermal deformation of the grid lead assembly, further affecting the sealing performance of the grid lead assembly, and even burning the internal parts of the electron tube, affecting the reliability and service life of the electron tube. Utility Model Content

[0003] The technical problem to be solved by the utility model is that the existing electron tube grid lead-out components have insufficient connection strength, poor sealing performance, and a high risk of air leakage, which affects the reliability and service life of the electron tube.

[0004] In order to solve the above technical problems, the utility model provides an electron tube grid lead-out plate, comprising: an annular plate body and a Kovar alloy welding ring, wherein the annular plate body is provided with a plate surface and an outer wall arranged perpendicular to the plate surface;

[0005] The Kovar alloy welding ring is an annular cover structure, including a radial annular segment and an axial annular segment, and the outer edge of the radial annular segment vertically extends toward one side of the annular disk to form the axial annular segment;

[0006] The inner diameter of the axial annular segment is larger than the diameter of the disk body, and the inner surface of the radial annular segment is tightly connected to the top disk surface of the disk body, so that the Kovar alloy welding ring sealing cover is arranged on the outer edge of the disk body.

[0007] In a further preferred embodiment of the present invention, the radial annular segment and the disc body are welded by brazing, and this welding method can further enhance the sealing performance between the two.

[0008] In a further preferred embodiment of the utility model, the outer edge of the top disk surface of the annular disk body is provided with a step for accommodating the inner edge of the radial annular segment, thereby reducing exposure of the end of the radial annular segment, enhancing sealing, and making the positioning of the Kovar alloy welding ring during packaging more accurate.

[0009] In a further preferred embodiment of the present invention, the height of the step is greater than or equal to the thickness of the radial annular segment, so that the outer edge of the radial annular segment can be completely located within the step, further improving the sealing performance.

[0010] In a further preferred embodiment of the utility model, a preset distance is provided between the axial annular segment and the outer wall of the annular disk body, so that an annular welding groove is formed therebetween, which facilitates argon arc welding of the axial annular segment and the anode lead-out end.

[0011] In a further preferred embodiment of the present invention, the radial distance between the axial ring segment and the outer wall of the annular disk body is 4-6 mm, which ensures the effect of argon arc welding between the axial ring segment and the anode lead-out end, and at the same time can ensure the strength of the Kovar alloy welding ring.

[0012] In a further preferred embodiment of the utility model, the thickness of the axial annular segment is 0.5-1.5 mm, which can ensure the strength of the axial annular segment and increase the welding strength when the axial annular segment and the anode lead-out end are welded by argon arc welding to ensure the airtightness between the two.

[0013] In a further preferred embodiment of the utility model, a plug hole for connecting the grid is provided on the disk body, and the plug hole is used to connect the grid lead wire.

[0014] In a further preferred embodiment of the utility model, a buckling portion for airtight connection with the electron tube base is provided at the bottom of the disk body, and the buckling portion is used to buckle with the base of the electron tube to increase the sealing between the two and facilitate assembly and positioning between the two.

[0015] The utility model also provides an electron tube, comprising a base and an anode lead-out terminal, and also comprising any of the electron tube grid lead-out disks described above, wherein the disk body is arranged on the base, and the anode lead-out terminal is conformally welded to the outer surface of the Kovar alloy welding ring.

[0016] Beneficial effects of the utility model: the electron tube grid lead-out disk provided by the utility model improves the overall strength and sealing performance of the annular disk body by arranging a Kovar alloy welding ring, helps to maintain a high vacuum degree inside the electron tube, and reduces the risk of damage and leakage of the grid lead-out disk, thereby improving the stability and service life of the electron tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the three-dimensional structure of a grid lead-out plate of an electron tube provided by an embodiment of the utility model;

[0019] Figure 2 A schematic cross-sectional view of a grid lead-out plate of an electron tube provided by an embodiment of the utility model;

[0020] Figure 3 A schematic diagram of a three-dimensional structure of a Kovar alloy welding ring provided in one embodiment of the utility model;

[0021] Figure 4 A schematic diagram of the three-dimensional structure of an annular disk provided in one embodiment of the utility model;

[0022] Figure 5 A schematic diagram of the internal structure of a grid lead-out plate of an electron tube provided by an embodiment of the utility model;

[0023] Figure 6 A schematic diagram of the structure of an electron tube provided by an embodiment of the utility model;

[0024] Figure 7 for Figure 6 A magnified schematic diagram of center A.

[0025] Icons: 1. Annular disk; 11. Step; 12. Plug hole; 13. Snap connection; 2. Kovar alloy welding ring; 21. Radial ring segment; 22. Axial ring segment; 3. Annular welding groove; 4. Base; 5. Anode output terminal. DETAILED DESCRIPTION

[0026] In order to more clearly understand the above-mentioned purposes, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0027] The embodiment of the utility model provides an electron tube grid lead-out plate, which is mainly used to solve the problems of insufficient connection strength, poor sealing performance and high risk of air leakage of existing grid lead-out components of existing electron tubes, which affect the reliability and service life of the electron tubes.

[0028] like Figures 1 to 5As shown, the electron tube grid lead-out disk provided in this embodiment comprises: an annular disk body 1 and a Kovar alloy welding ring 2, wherein the annular disk body 1 is provided with a disk surface and an outer wall vertically arranged with respect to the disk surface; the Kovar alloy welding ring 2 is an annular cover structure, comprising a radial annular segment 21 and an axial annular segment 22, wherein the outer edge of the radial annular segment 21 vertically extends toward one side of the annular disk body 1 to form the axial annular segment 22;

[0029] Furthermore, the inner surface of the radial ring segment 21 is tightly connected to the top disk surface of the annular disk body 1, so that the sealing cover of the Kovar alloy welding ring 2 is arranged on the outer edge of the annular disk body 1. The inner surface of the radial ring segment 21 is connected to the top disk surface of the annular disk body 1 by brazing to form a firm sealing structure. The annular disk body 1 is made of metal nickel, which is different from the material of the Kovar alloy welding ring 2. The brazing welding method can further improve the sealing performance of the grid lead structure, prevent air leakage, and thus maintain a high vacuum inside the electron tube.

[0030] Furthermore, the outer edge of the top disk surface of the annular disk body 1 is provided with a step 11 for accommodating the inner edge of the radial ring segment 21. This design effectively reduces the exposure of the end of the radial ring segment 21 and enhances the overall sealing performance. By embedding the inner edge of the radial ring segment 21 into the step 11, it can ensure close contact between it and the top disk surface of the disk body, thereby improving the sealing performance.

[0031] In addition, the setting of the step 11 also helps to achieve more accurate positioning when the Kovar alloy welding ring 2 is packaged. When the Kovar alloy welding ring 2 is installed on the disk body, the inner edge of the radial ring segment 21 can naturally match the step 11, making the installation and positioning of the entire assembly easier and faster. This design improves the assembly efficiency and accuracy of the electron tube grid lead-out disk, thereby ensuring the stable performance and service life of the electron tube in practical applications.

[0032] Furthermore, the height of the step 11 is greater than or equal to the thickness of the radial ring segment 21. This design ensures that the outer edge of the radial ring segment 21 can be completely located in the step 11, thereby further enhancing the sealing performance. When the height of the step 11 is equal to or greater than the thickness of the radial ring segment 21, the radial ring segment 21 can be completely embedded in the step 11 and closely contact the top disk surface of the disk body. In this way, a more rigorous sealing structure can be formed between the radial ring segment 21 and the top disk surface of the disk body, which helps to maintain a high vacuum inside the electron tube and reduce the risk of air leakage.

[0033] Furthermore, a preset distance is provided between the axial annular segment 22 and the outer wall of the annular disc body 1, so that an annular welding groove 3 is formed therebetween. This design is conducive to argon arc welding between the axial annular segment 22 and the anode lead-out terminal 5.

[0034] By setting a preset distance, an annular welding groove 3 is formed between the outer wall of the annular disc 1 and the axial annular segment 22. This welding groove reserves enough space to make the argon arc welding process easier and more stable. During the argon arc welding process, the annular welding groove 3 provides an appropriate gap to facilitate the operator's operation and observation of the welding area, which helps to obtain more accurate welding results.

[0035] In addition, the reserved annular welding groove 3 space also helps to ensure smooth gas flow during welding, reduce the impact of gas flow on the welding area, and thus improve welding quality. By reserving the annular welding groove 3, the heat generated during welding can be better dispersed, which helps to reduce the temperature change in the welding area, reduce the stress and deformation caused by temperature change, and improve welding strength.

[0036] Furthermore, the radial distance between the axial annular segment 22 and the outer wall of the annular disk body 1 is 4-6 mm, and the distance of 4-6 mm can also ensure the strength of the Kovar alloy welding ring 2. Within this distance range, the axial annular segment 22 and the outer wall of the annular disk body 1 maintain appropriate strength to prevent deformation or damage of the Kovar alloy welding ring 2 due to excessive stress. In addition, this distance range is also conducive to the Kovar alloy welding ring 2 maintaining a stable shape during the welding process, reducing deformation and damage caused by thermal effects during the welding process.

[0037] Furthermore, the thickness of the axial ring segment 22 is 0.5-1.5 mm. When the thickness of the axial ring segment 22 is set within the range of 0.5-1.5 mm, sufficient strength can be provided for the Kovar alloy welding ring 2. This thickness range enables the axial ring segment 22 to have a good anti-deformation ability when subjected to external stress, thereby reducing the risk of damage. At the same time, this thickness range is also conducive to the axial ring segment 22 maintaining its original shape, ensuring the overall performance and service life of the electron tube grid lead-out plate.

[0038] Furthermore, the plate body is provided with a plug hole 12 for connecting the grid. The plug hole 12 is used to connect the grid lead wire, thereby realizing the connection between the grid and the electron tube grid lead plate.

[0039] The plug hole 12 is located on the top disk surface of the disk body, and its size and shape match the size and shape of the grid lead wire, so as to achieve a tight and stable connection when the grid lead wire is inserted. The design of the plug hole 12 helps to ensure good electrical contact between the electron tube grid lead wire and the annular disk body 1, thereby ensuring the normal operation of the electron tube.

[0040] After the gate lead wire is inserted into the plug hole 12, it can be fixed in various ways, such as welding, buckling, threaded connection, etc. Through these connection methods, the connection between the gate lead wire and the annular disk body 1 can be made more firm, and it is convenient for maintenance and replacement.

[0041] During the assembly process, the grid lead wire is first inserted into the plug hole 12 on the disk body, and then an appropriate fixing method is used to make the connection between the grid lead wire and the annular disk body 1 more firmly. Next, the electron tube grid lead disk is assembled with the electron tube base 4 to complete the assembly process of the electron tube.

[0042] Furthermore, a buckle connection portion 13 for airtight connection with the electron tube base 4 is provided at the bottom of the annular disk body 1. The buckle connection portion 13 is used to buckle with the electron tube base 4 to increase the sealing between the two and facilitate the assembly and positioning between the two. The buckle connection portion 13 can be designed into various shapes and structures, such as a slot, a boss, a buckle, a threaded connection, etc., to adapt to different types of electron tube bases 4. The present embodiment adopts a slot structure. During the assembly process, the buckle connection portion 13 cooperates with the corresponding parts of the electron tube base 4 to achieve an airtight connection, ensure the high vacuum inside the electron tube and prevent gas leakage.

[0043] The design of the buckle part 13 helps to simplify the assembly process of the electron tube and improve production efficiency. During the assembly process of the electron tube, the buckle part 13 of the electron tube grid lead plate is butted with the corresponding part of the electron tube base 4 so that the two are tightly buckled. This connection method not only improves the sealing performance of the electron tube, but also makes the connection between the electron tube grid lead plate and the electron tube base 4 more stable and firm.

[0044] In addition, the connection mode between the buckle part 13 and the electron tube base 4 can be adjusted according to actual needs, such as adopting a detachable connection mode to facilitate the maintenance and replacement of the electron tube. By providing the buckle part 13, the utility model improves the convenience of electron tube assembly and the sealing performance, thereby ensuring the stable operation and service life of the electron tube.

[0045] like Figure 6 and Figure 7 As shown, the embodiment of the utility model further provides an electron tube, comprising a base 4, an anode lead-out terminal 5 and a grid lead-out plate. The grid lead-out plate of the electron tube can be the grid lead-out plate of the electron tube described in the above embodiment.

[0046] The annular disk 1 is disposed on the base 4. The base 4 can be made of various materials and structures to carry various components inside the electron tube and ensure a high vacuum inside the electron tube. The connection between the base 4 and the grid lead-out disk can be achieved by buckling, threading, welding, etc. to achieve a tight sealing connection.

[0047] The anode lead-out terminal 5 is configured to conform to the outer surface of the Kovar alloy welding ring 2. The anode lead-out terminal 5 also adopts Kovar alloy and is welded to the Kovar alloy welding ring 2 by argon arc welding. Kovar alloy is a hard glass iron-based sealing alloy containing 29% nickel and 17% cobalt. The alloy has a linear expansion coefficient similar to that of hard glass in the range of 20 to 450°C and can be effectively sealed and matched with the corresponding hard glass, and has a higher Curie point and good low-temperature structural stability. The oxide film of the alloy is dense, easy to weld and fuse, has good plasticity, can be cut and processed, and is widely used in the manufacture of electric vacuum components. Since the two materials are the same, a better welding effect can be achieved during argon arc welding, so that the two are connected more closely, the sealing performance of the electron tube is improved, the risk of leakage is reduced, and the reliability and service life of the electron tube are improved. The electron tube provided by the embodiment of the utility model fully utilizes the advantages of the electron tube grid lead-out disk to achieve high sealing performance and high reliability.

[0048] When in use, the necessary tools and materials are prepared, including the electron tube grid lead plate, the electron tube base 4, the anode lead terminal 5, the grid lead wire, the brazing equipment and the argon arc welding equipment, etc.

[0049] Insert the gate lead wire into the insertion hole 12 on the disk body, and then use an appropriate fixing method (such as welding, snap-fitting, threaded connection, etc.) to make the connection between the gate lead wire and the disk body more secure.

[0050] The buckle connection part 13 of the electron tube grid lead plate is butted with the corresponding part of the electron tube base 4 so that the two are tightly buckled. The connection method can be buckle connection, thread connection, welding, etc. to achieve a tight sealing connection.

[0051] The anode lead-out terminal 5 is arranged in a contour with the outer surface of the Kovar alloy welding ring 2, and is welded to the Kovar alloy welding ring 2 by argon arc welding. An annular welding groove 3 is formed between the outer wall of the annular disk 1 and the axial annular segment 22 to ensure that the heat generated during the welding process can be better dispersed and reduce the temperature change in the welding area.

[0052] Check the sealing performance and electrical contact of the electron tube after assembly to ensure that the electron tube can work normally.

[0053] Install the assembled electron tubes into the corresponding equipment for further testing and debugging to ensure the stable performance and service life of the electron tubes.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A grid lead plate for an electron tube, characterized in that: include: The annular disk body is provided with a disk surface and an outer wall arranged perpendicular to the disk surface; The Kovar alloy welding ring is an annular cover structure, including a radial annular segment and an axial annular segment, wherein the outer edge of the radial annular segment vertically extends toward one side of the annular disk body to form the axial annular segment; The inner diameter of the axial annular segment is larger than the diameter of the disk body, and the inner surface of the radial annular segment is tightly connected to the top disk surface of the disk body, so that the Kovar alloy welding ring sealing cover is arranged on the outer edge of the disk body.

2. The electron tube grid lead plate according to claim 1, characterized in that: The radial annular segment is welded to the disk body by brazing.

3. The electron tube grid lead plate according to claim 1, characterized in that: The outer edge of the top disk surface of the annular disk body is provided with a step for accommodating the inner edge of the radial annular segment.

4. The electron tube grid lead plate according to claim 3, characterized in that: The height of the step is greater than or equal to the thickness of the radial annular segment.

5. The electron tube grid lead plate according to claim 1, characterized in that: A preset distance is set between the axial annular segment and the outer wall of the annular disk body so that an annular welding groove is formed therebetween.

6. The electron tube grid lead plate according to claim 5, characterized in that: The radial distance between the axial annular segment and the outer wall of the annular disk body is 4-6 mm.

7. The electron tube grid lead plate according to claim 6, characterized in that: The thickness of the axial annular segment is 0.5-1.5 mm.

8. The electron tube grid lead plate according to any one of claims 1 to 7, characterized in that: The disk body is provided with a plug-in hole for connecting the grid.

9. The electron tube grid lead plate according to claim 8, characterized in that: The bottom of the disk body is provided with a buckle connection part for sealing connection with the electron tube base.

10. An electron tube, comprising a base and an anode lead-out terminal, characterized in that: It also comprises the electron tube grid lead-out disk according to any one of claims 1 to 9, wherein the disk body is arranged on the base, and the anode lead-out terminal is conformally welded to the outer surface of the Kovar alloy welding ring.

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