A gas discharge tube manufacturing process

Abstract

The present invention provides a gas discharge tube manufacturing process, which relates to the field of overvoltage protection technology. The gas discharge tube manufacturing process includes: obtaining a discharge tube body; obtaining a connecting tape encapsulated with a plurality of pairs of leads; clamping the discharge tube body with the same pair of leads, welding the leads to the discharge tube body to obtain a gas discharge tube; testing the gas discharge tube to screen out qualified gas discharge tubes; printing the qualified gas discharge tubes; and taping the printed gas discharge tubes. When welding the leads to the discharge tube body, the leads are encapsulated in the connecting tape, and the discharge tube body is clamped and fixed by the leads. There is no need for operators to manually clamp and fix the leads and the discharge tube body, and the degree of automation is high. In addition, the prepared gas discharge tubes are all transferred through the connecting tape, so that the connecting tape is sequentially transferred to each subsequent device, and the testing, printing and taping of the gas discharge tube can be completed continuously, saving labor time and also being conducive to the automated production of gas discharge tubes.

Description

Technical Field

[0001] The present invention relates to the technical field of overvoltage protection, and in particular to a manufacturing process of a gas discharge tube. Background Art

[0002] A gas discharge tube (GDT) is a switching protection device commonly used as an overvoltage protection device. Its basic operating principle is gas discharge. When the voltage across the GDT's electrodes exceeds the gas's breakdown voltage, a gap discharge occurs, protecting downstream circuits connected in parallel with the GDT.

[0003] In the current manufacturing process of leaded gas discharge tubes, all steps after electroplating (including printing, welding, testing, taping, etc.) are all independent and separate processes. The process flow is complicated and the working time is long, which is not conducive to automated production. Summary of the Invention

[0004] In order to solve the problems existing in the prior art, the present invention aims to provide a gas discharge tube manufacturing process.

[0005] The present invention provides the following technical solutions:

[0006] A gas discharge tube manufacturing process is used to manufacture a gas discharge tube, wherein the gas discharge tube comprises a discharge tube body and a lead wire, wherein the lead wire is parallel to an end surface of one end of the discharge tube body along an axial direction;

[0007] The gas discharge tube manufacturing process comprises:

[0008] Obtaining the discharge tube body;

[0009] Obtaining a connection tape encapsulating a plurality of pairs of leads, wherein the leads are partially located outside the connection tape;

[0010] clamping the discharge tube body with the same pair of lead wires, and welding the lead wires to the discharge tube body to obtain the gas discharge tube;

[0011] Testing the gas discharge tubes to select qualified gas discharge tubes;

[0012] Printing the qualified gas discharge tubes;

[0013] The printed gas discharge tube is braided.

[0014] As a further optional solution to the gas discharge tube manufacturing process, the step of welding the lead wire to the discharge tube body includes:

[0015] immersing the lead wire and the discharge tube body in flux and then taking them out;

[0016] preheating the lead wire and the discharge tube body;

[0017] The lead wire and the discharge tube body are immersed in tin and then taken out.

[0018] As a further optional solution to the gas discharge tube manufacturing process, the lead wires include a pin portion and a welding portion connected to each other, the welding portion is located outside the connecting band, and the welding portions of the same pair of lead wires intersect obliquely;

[0019] The step of making the same pair of lead wires clamp the discharge tube body comprises:

[0020] The welding portions of the same pair of lead wires are used to clamp the discharge tube body.

[0021] As a further optional solution to the manufacturing process of the gas discharge tube, the welding portion is provided along a radial direction of the discharge tube body.

[0022] As a further optional solution to the manufacturing process of the gas discharge tube, the length of the discharge tube body along the axial direction is L, and L is less than or equal to 4 mm.

[0023] As a further optional solution to the gas discharge tube manufacturing process, after the step of welding the lead wire to the discharge tube body, the process further includes:

[0024] An insulating sealing layer is coated on the surfaces of the lead wire and the discharge tube body.

[0025] As a further optional solution to the gas discharge tube manufacturing process, the step of coating the surfaces of the lead wire and the discharge tube body with an insulating encapsulation layer includes:

[0026] preheating the lead wire and the discharge tube body;

[0027] spraying or dipping the encapsulation material onto the surface of the lead wire and the discharge tube body;

[0028] The lead wire and the discharge tube body are baked to solidify the encapsulation material to form the insulating encapsulation layer.

[0029] As a further optional solution to the gas discharge tube manufacturing process, the encapsulation material is epoxy resin or phenolic resin.

[0030] As a further optional solution to the gas discharge tube manufacturing process, the discharge tube body includes a porcelain tube, a welding piece, and an end electrode. The welding piece is provided at both ends of the porcelain tube along the axial direction. The end electrode is provided on the side of the welding piece facing away from the porcelain tube and connected to the porcelain tube via the welding piece. The side of the end electrode facing the welding piece has a mesh surface.

[0031] The step of obtaining the discharge tube body comprises:

[0032] Coating a cathode emission layer on the grid surface of the terminal electrode;

[0033] Installing the porcelain tube, the welding piece and the end electrode into the assembly hole of the graphite sealing mold;

[0034] The graphite sealing mold is placed in a sealing furnace and sealed to form the discharge tube body.

[0035] As a further optional solution to the gas discharge tube manufacturing process, after the step of sealing to form the discharge tube body, the process further includes:

[0036] applying a preset voltage to the discharge tube body to age the discharge tube body;

[0037] Place the discharge tube body under a preset air pressure and check for leaks;

[0038] An anti-oxidation conductive layer is electroplated on the surface of the terminal electrode.

[0039] The embodiments of the present invention have the following beneficial effects:

[0040] When manufacturing a gas discharge tube using the above-mentioned gas discharge tube manufacturing process, a plurality of pairs of leads are first encapsulated with a connecting tape, with the lead portions positioned outside the connecting tape. The same pair of leads are then used to clamp the discharge tube body. The leads are then welded to the discharge tube body to produce the gas discharge tube. Finally, the gas discharge tube is tested, printed, and taped. When welding the leads to the discharge tube body, the leads are encapsulated in the connecting tape, and the discharge tube body is clamped and fixed by the leads. This eliminates the need for operators to manually clamp and fix the leads and the discharge tube body, resulting in a high degree of automation. Furthermore, the manufactured gas discharge tubes are transferred via the connecting tape, allowing the connecting tape to be sequentially transferred to subsequent equipment. This allows for continuous testing, printing, and taping of the gas discharge tube, saving labor time and facilitating the automated production of gas discharge tubes.

[0041] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0043] Figure 1 A schematic structural diagram of a gas discharge tube in the related art is shown;

[0044] Figure 2 A schematic structural diagram of a gas discharge tube provided by an embodiment of the present invention is shown;

[0045] Figure 3 A schematic diagram showing the steps of a gas discharge tube manufacturing process provided by an embodiment of the present invention is shown;

[0046] Figure 4 A flow chart showing step S1 in a gas discharge tube manufacturing process provided by an embodiment of the present invention is shown;

[0047] Figure 5 FIG2 shows an operation diagram of step S1-1 in a gas discharge tube manufacturing process provided by an embodiment of the present invention;

[0048] Figure 6 1. A schematic diagram showing the operation of step S1-2 in a gas discharge tube manufacturing process provided by an embodiment of the present invention;

[0049] Figure 7 Schematic diagram showing the operation of steps S1-3 in a gas discharge tube manufacturing process provided by an embodiment of the present invention;

[0050] Figure 8 A schematic diagram illustrating the operation of steps S1-5 in a gas discharge tube manufacturing process provided by an embodiment of the present invention is shown;

[0051] Figure 9 Schematic diagram showing the operation of steps S1-6 in a gas discharge tube manufacturing process provided by an embodiment of the present invention;

[0052] Figure 10 A schematic diagram showing the connection relationship between the lead wire and the connecting tape in a manufacturing process of a gas discharge tube provided by an embodiment of the present invention is shown;

[0053] Figure 11 FIG2 shows an operation diagram of step S3 in a gas discharge tube manufacturing process provided by an embodiment of the present invention;

[0054] Figure 12 A flow chart of step S3 in a gas discharge tube manufacturing process provided by an embodiment of the present invention is shown;

[0055] Figure 13 FIG2 shows an operation diagram of step S3-1 in a gas discharge tube manufacturing process provided by an embodiment of the present invention;

[0056] Figure 14 Schematic diagram showing the operation of step S3-4 in a gas discharge tube manufacturing process provided by an embodiment of the present invention;

[0057] Figure 15 A schematic diagram showing the steps of a gas discharge tube manufacturing process provided by another embodiment of the present invention is shown;

[0058] Figure 16 A flow chart showing step S3' in a gas discharge tube manufacturing process provided by an embodiment of the present invention is shown;

[0059] Figure 17 FIG2 shows an operation diagram of step S3′-2 in a gas discharge tube manufacturing process provided by an embodiment of the present invention;

[0060] Figure 18 FIG2 shows an operation diagram of step S3′-3 in a gas discharge tube manufacturing process provided by an embodiment of the present invention;

[0061] Figure 19 The diagram shows the operations of steps S4, S5 and S6 in a gas discharge tube manufacturing process provided by an embodiment of the present invention.

[0062] Description of main component symbols:

[0063] 100-gas discharge tube; 110-discharge tube body; 111-porcelain tube; 112-soldering piece; 113-end electrode; 1131-grid surface; 1132-cathode emission layer; 1133-anti-oxidation conductive layer; 120-lead; 121-pin portion; 122-welding portion; 130-solder layer; 140-insulating encapsulation layer; 200-graphite sealing mold; 210-assembly hole; 300-sealing furnace; 310-graphite tray; 400-sealed container; 500-connecting tape; 600-first container; 700-tin furnace; 800-second container; 900-constant temperature oven; 1000-testing machine; 1100-laser printer; 1200-CCD detector; 1300-taping machine. DETAILED DESCRIPTION

[0064] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0065] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. Conversely, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0066] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0067] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0068] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the template description herein are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0069] See also Figure 1 In the related art, a gas discharge tube 100 is composed of a discharge tube body 110 and two leads 120. The leads 120 extend along the axis of the discharge tube body 110, with one lead 120 connected to one end of the discharge tube body 110 along the axis, and the other lead 120 connected to the other end of the discharge tube body 110 along the axis.

[0070] The manufacturing process of the gas discharge tube 100 mainly consists of the following steps: coating → assembly → sealing → aging → leak detection → electroplating → printing → welding → testing, and taping. All steps after electroplating are independent and separate processes, which are complex and time-consuming, making them unsuitable for automated production.

[0071] Furthermore, the gas discharge tube 100 is relatively large, with exposed electrodes. This limits its suitability for applications requiring minimal product size and requiring minimal EMC distances. This also poses a risk of reduced withstand voltage when in contact with power lines. Furthermore, as a gas discharge tube 100 is an overvoltage protection device, its electrode terminals typically carry high voltage, posing a safety hazard.

[0072] Example

[0073] To address the above problems, this embodiment provides a gas discharge tube manufacturing process for manufacturing a gas discharge tube 100 .

[0074] See also Figure 2 In this embodiment, the gas discharge tube 100 includes a discharge tube body 110 and two lead wires 120 .

[0075] The discharge tube body 110 includes a porcelain tube 111, two welding lugs 112, and two end electrodes 113. The two welding lugs 112 are respectively arranged at the two ends of the porcelain tube 111 along the axial direction. The two end electrodes 113 are respectively arranged on the side of the welding lugs 112 facing away from the porcelain tube 111 and are connected to the porcelain tube 111 through the corresponding welding lugs 112.

[0076] In addition, the lead wire 120 is parallel to the end surface of one end of the discharge tube body 110 along the axial direction. The two lead wires 120 are located at both ends of the discharge tube body 110 along the axial direction and are connected to the end electrodes 113 respectively.

[0077] See also Figure 3 The above-mentioned gas discharge tube manufacturing process includes the following steps:

[0078] S1, obtaining the discharge tube body 110.

[0079] See also Figure 4 The specific steps of obtaining the discharge tube body 110 are as follows:

[0080] S1 - 1 , coating a cathode emission layer 1132 on the mesh surface 1131 of the terminal electrode 113 .

[0081] See also Figure 5 The side of the terminal electrode 113 facing the welding piece 112 has a mesh surface 1131. A cathode emission material of a certain thickness is coated on the mesh surface 1131 to form a cathode emission layer 1132.

[0082] In addition, the material of the terminal electrode 113 can be an iron-nickel alloy or oxygen-free copper, which is not limited in this embodiment.

[0083] S1-2, install the porcelain tube 111, welding piece 112 and end electrode 113 into the assembly hole 210 of the graphite sealing mold 200.

[0084] See also Figure 6 , using a graphite sealing mold 200, one of the end electrodes 113, one of the welding pieces 112, the porcelain tube 111, another welding piece 112 and another end electrode 113 are sequentially installed into the assembly hole 210 of the graphite sealing mold 200. The graphite sealing mold 200 has a plurality of assembly holes 210.

[0085] S1-3, placing the graphite sealing mold 200 into the sealing furnace 300, and sealing to form the discharge tube body 110.

[0086] See also Figure 7 The assembled graphite sealing mold 200 is placed on the graphite tray 310 in the sealing furnace 300, and the door of the sealing furnace 300 is closed. The furnace chamber of the sealing furnace 300 is evacuated and heated to a certain temperature. An inert gas is then filled into the furnace chamber, and the temperature is then raised to approximately 850°C. Finally, the temperature is cooled to room temperature, thereby sealing and forming the discharge tube body 110.

[0087] Furthermore, after the discharge tube body 110 is sealed and formed, the following steps are further included:

[0088] S1 - 4 , applying a preset voltage to the discharge tube body 110 to age the discharge tube body 110 .

[0089] Specifically, a preset voltage is applied to the discharge tube body 110 to make current flow through the discharge tube body 110 , and the time for the current to flow through the discharge tube body 110 is controlled to better age the discharge tube body 110 .

[0090] Exemplarily, the preset voltage is not less than 1.5 times the nominal discharge voltage of the discharge tube body 110 .

[0091] S1-5, placing the discharge tube body 110 under a preset air pressure and checking for leaks.

[0092] See also Figure 8 The sealed discharge tube body 110 is placed in a sealed container 400 with gas at several times the atmospheric pressure and stored for a certain period of time to determine the leak point in advance.

[0093] S1-6, electroplating an anti-oxidation conductive layer 1133 on the surface of the terminal electrode 113.

[0094] See also Figure 9 A certain thickness of nickel or tin is plated on the surface of the terminal electrode 113 to form an anti-oxidation conductive layer 1133, so that the discharge tube body 110 is not easily oxidized and can be better welded to the lead wire 120 in subsequent processes.

[0095] S2 , obtaining a connection tape 500 encapsulating a plurality of pairs of leads 120 , wherein the leads 120 are partially located outside the connection tape 500 .

[0096] See also Figure 10 The connecting tape 500 is encapsulated with multiple pairs of leads 120. Each pair of leads 120 is arranged sequentially along the extension direction of the packaging bag, and the two leads 120 of the same pair are stacked along the thickness direction of the connecting tape 500. In addition, a portion of the leads 120 is encapsulated on the connecting tape 500, and the other portion is located outside the connecting tape 500.

[0097] Illustratively, the connecting tape 500 is a paper tape, and the lead wire 120 may be made of a tinned copper wire or a copper-clad steel wire, which is not limited in this embodiment.

[0098] S3 , clamping the discharge tube body 110 with the same pair of lead wires 120 , and welding the lead wires 120 to the discharge tube body 110 to obtain the gas discharge tube 100 .

[0099] See also Figure 11 The distance between the two lead wires 120 in the same pair along the thickness direction of the connecting strip 500 is less than the axial length of the discharge tube body 110. When the discharge tube body 110 is sandwiched between the two stacked lead wires 120, the two lead wires 120 are stretched apart by the discharge tube body 110, elastically deforming and clamping the discharge tube body 110 with a certain elastic force, thereby securing the discharge tube body 110.

[0100] When welding the lead wire 120 and the discharge tube body 110 , the lead wire 120 is encapsulated in the connecting tape 500 , and the discharge tube body 110 is clamped and fixed by the lead wire 120 . This eliminates the need for an operator to manually clamp and fix the lead wire 120 and the discharge tube body 110 , resulting in a high degree of automation.

[0101] In addition, compared with providing an additional clamping device to clamp and fix the lead wire 120 and the discharge tube body 110 , the structure of this embodiment is simpler, the cost is lower, and it is more conducive to the automated production of the gas discharge tube 100 .

[0102] In some embodiments, the leads 120 are composed of interconnected pin portions 121 and soldering portions 122. The pin portions 121 away from the soldering portions 122 are encapsulated on the connection strip 500, while the pin portions 121 near the soldering portions 122 and the soldering portions 122 are located outside the connection strip 500. Furthermore, the soldering portions 122 of the same pair of leads 120 intersect at an angle.

[0103] Accordingly, making the same pair of lead wires 120 clamp the discharge tube body 110 specifically means making the welding portions 122 of the same pair of lead wires 120 clamp the discharge tube body 110 .

[0104] When the discharge tube body 110 is clamped and fixed by the leads 120, the clamping force applied by the leads 120 to the discharge tube body 110 acts on the area of ​​the discharge tube body 110 contacting the leads 120, corresponding to the welded portion 122. Arranging the welded portions 122 of the same pair of leads 120 to intersect at an angle ensures that the discharge tube body 110 is subjected to forces of equal magnitude, opposite direction, and collinearity from the two leads 120 in at least a certain area, thereby facilitating the leads 120 to stably clamp the discharge tube body 110.

[0105] Conversely, if the two leads 120 are parallel to each other, the discharge tube body 110 can only be stably clamped when the two leads 120 are completely aligned along the axis of the discharge tube body 110. If the two leads 120 are misaligned, no area of ​​the discharge tube body 110 can be subjected to the equal, opposite, and collinear forces from the two leads 120. This can easily cause the discharge tube body 110 to deflect and prevent it from being stably clamped and fixed by the leads 120.

[0106] Furthermore, the welding portion 122 is provided along the radial direction of the discharge tube body 110 .

[0107] When the discharge tube body 110 is clamped and fixed by the lead wire 120 , the clamping force applied by the lead wire 120 to the discharge tube body 110 acts on the center of the discharge tube body 110 , which helps the lead wire 120 clamp the discharge tube body 110 more stably.

[0108] In some embodiments, the length of the discharge tube body 110 along the axial direction is L, which satisfies L≤4 mm.

[0109] In the related art, the discharge tube body 110 has an axial length of no less than 6 mm, resulting in a large volume and weight, making it difficult for the lead wire 120 to stably clamp and secure the discharge tube body 110. In this embodiment, the discharge tube body 110 has an axial length of no more than 4 mm, and is relatively small in volume and weight, which facilitates the lead wire 120 to stably clamp and secure the discharge tube body 110.

[0110] Exemplarily, the length of the discharge tube body 110 along the axial direction is 4 mm.

[0111] See also Figure 12 In some embodiments, the specific steps of welding the lead wire 120 to the discharge tube body 110 are as follows:

[0112] S3-1, immerse the lead wire 120 and the discharge tube body 110 in the flux and then take them out.

[0113] See also Figure 13The soldering flux is contained in the first container 600. When the lead wire 120 and the discharge tube body 110 move above the first container 600 along with the connecting tape 500, the connecting tape 500 moves downward, immersing the lead wire 120 and the discharge tube body 110 in the soldering flux. Subsequently, the connecting tape 500 moves upward, pulling the lead wire 120 and the discharge tube body 110 out of the first container 600.

[0114] S3-2, preheating the lead wire 120 and the discharge tube body 110.

[0115] Exemplarily, the preheating temperature is 200° C. and the preheating time is 3 seconds.

[0116] S3-3, immerse the lead wire 120 and the discharge tube body 110 in tin and then take them out.

[0117] See also Figure 14 The tin pot 700 is filled with liquid tin at a temperature of 245°C. When the lead wire 120 and the discharge tube body 110, along with the connecting tape 500, move above the tin pot 700, the connecting tape 500 moves downward, immersing the lead wire 120 and the discharge tube body 110 in the liquid tin. Subsequently, the connecting tape 500 moves upward, pulling the lead wire 120 and the discharge tube body 110 out of the tin pot 700. As the temperature of the lead wire 120 and the discharge tube body 110 drops, the tin adhered to the lead wire 120 and the discharge tube body 110 gradually solidifies to form a solder layer 130, soldering the lead wire 120 and the discharge tube body 110 together.

[0118] Please also refer to Figure 2 and Figure 15 In some embodiments, the gas discharge tube 100 further includes an insulating encapsulating layer 140, and the insulating encapsulating layer 140 covers the discharge tube body 110 and an end of the lead wire 120 close to the discharge tube body 110. Accordingly, after the step of welding the lead wire 120 to the discharge tube body 110, the following steps are further included:

[0119] S3 ′, coating the surfaces of the lead wire 120 and the discharge tube body 110 with an insulating encapsulating layer 140 .

[0120] It is understandable that the end electrode 113 and the lead 120 are both made of conductive materials. When exposed, they may come into contact with other electrical components on the circuit board and cause a short circuit. Using the insulating encapsulation layer 140 to cover the discharge tube body 110 and the end of the lead 120 close to the discharge tube body 110 can effectively solve this problem. This is particularly suitable for application scenarios with requirements on product volume and a small EMC distance.

[0121] Furthermore, when the axial length of the discharge tube body 110 is no greater than 4 mm, the distance between the two end electrodes 113 is too short, potentially causing current to break through the air outside the discharge tube body 110, causing conduction between the two end electrodes 113 and affecting other electrical components on the circuit board. By encapsulating the discharge tube body 110 and the end of the lead wire 120 proximal to the discharge tube body 110 with the insulating encapsulating layer 140, a discharge path is prevented from forming outside the discharge tube body 110. This ensures a stable and controllable gap discharge process, facilitating the proper operation of the gas discharge tube 100 and other electrical components on the circuit board.

[0122] Furthermore, in harsh environments, the porcelain tube 111 may absorb moisture, thereby affecting the performance of the gas discharge tube 100. However, the insulating encapsulation layer 140 envelops the porcelain tube 111, thereby preventing the porcelain tube 111 from coming into contact with moisture in the external environment and, thus, preventing the porcelain tube 111 from absorbing moisture, thereby facilitating the reliable operation of the gas discharge tube 100.

[0123] Exemplarily, the insulating encapsulating layer 140 encloses the welding portion 122 of the lead 120 and the discharge tube body 110. The pin portion 121 of the lead 120 is located outside the insulating encapsulating layer 140 so as to be connected to the circuit board.

[0124] See also Figure 16 In some embodiments, the specific steps of step S3 are as follows:

[0125] S3`-1, preheating the lead wire 120 and the discharge tube body 110.

[0126] Specifically, the lead wire 120 and the discharge tube body 110 are placed in a constant temperature oven 900 and preheated for 30 minutes. The internal temperature of the oven during preheating is 120°C.

[0127] S3`-2, spraying or dipping the encapsulation material onto the surfaces of the lead wire 120 and the discharge tube body 110.

[0128] See also Figure 17 Taking dip coating as an example, the encapsulating material is placed in a second container 800. As the lead wire 120 and the discharge tube body 110, along with the connecting tape 500, move above the second container 800, the connecting tape 500 moves downward, immersing the lead wire 120 and the discharge tube body 110 in the encapsulating material. Subsequently, the connecting tape 500 moves upward, pulling the lead wire 120 and the discharge tube body 110 out of the first container 600. At this point, the encapsulating material is evenly coated on the surfaces of the lead wire 120 and the discharge tube body 110, completely covering the welded portion 122 of the lead wire 120 and the discharge tube body 110.

[0129] Optionally, the encapsulating material is epoxy resin or phenolic resin.

[0130] S3`-3, baking the lead wire 120 and the discharge tube body 110 to solidify the encapsulation material to form an insulating encapsulation layer 140.

[0131] See also Figure 18 The lead wire 120 with the encapsulation material attached and the discharge tube body 110 are moved to the constant temperature oven 900 along with the connecting tape 500 for baking to remove moisture from the encapsulation material, so that the encapsulation material is completely hardened to form an insulating encapsulation layer 140, which seals the lead wire 120, the welding portion 122 and the discharge tube body 110, thereby achieving a better discharge environment that is not affected by external interference.

[0132] S4, testing the gas discharge tubes 100 to select qualified gas discharge tubes 100.

[0133] See also Figure 19 The gas discharge tube 100 is moved to the testing machine 1000 along with the connecting belt 500. The testing machine 1000 tests the conventional performance of the gas discharge tube 100 (including but not limited to DC breakdown voltage, withstand voltage, insulation resistance, etc.), sorts out defective products, and thus screens out qualified gas discharge tubes 100.

[0134] S5, printing is performed on the qualified gas discharge tube 100.

[0135] See also Figure 19 The qualified gas discharge tube 100 is moved to the laser printer 1100 along with the connecting belt 500, and the laser printer 1100 prints words on the qualified gas discharge tube 100, and the printed words include company logo, product model, product certification, production batch number and other information.

[0136] Subsequently, the gas discharge tube 100 is moved along with the connecting belt 500 to the CCD inspection machine 1200, where the CCD inspection machine 1200 inspects whether the printed characters are correct.

[0137] S6, taping the printed gas discharge tube 100.

[0138] See also Figure 19 The printed gas discharge tube 100 is moved to the tape braiding machine 1300 along with the connecting tape 500, and the tape braiding machine 1300 braids the gas discharge tube 100 into paper tape according to the specification requirements.

[0139] In this embodiment, the tester 1000, laser printer 1100, CCD inspection machine 1200, and taping machine 1300 are arranged in series. Since the manufactured gas discharge tubes 100 are transferred via the connecting tape 500, the connecting tape 500 is sequentially transferred to each of the above-mentioned devices, allowing the gas discharge tubes 100 to be tested, printed, and taped continuously. This saves labor and facilitates automated production of the gas discharge tubes 100.

[0140] In summary, the above-described manufacturing process for gas discharge tubes 100 enables automated production, further improving production efficiency. Furthermore, the resulting gas discharge tubes 100 are smaller in size, occupying less space on a circuit board, saving up to 70% of space compared to conventional gas discharge tubes 100. Furthermore, this further reduces material costs, meeting user requirements for cost reduction.

[0141] Furthermore, the insulating encapsulation layer 140 encapsulates the soldering portion 122 of the lead 120 and the discharge tube body 110, providing a complete enclosure for the device exterior. This provides enhanced protection, higher reliability, and complies with high-standard PCB design specifications and requirements. Furthermore, the encapsulated gas discharge tube 100 exhibits no flash during discharge, preventing user panic.

[0142] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not limiting, and thus other examples of the exemplary embodiments may have different values.

[0143] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0144] The above-described embodiments merely illustrate several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that variations and modifications are possible without departing from the scope of the present invention, and such variations and modifications are fully within the scope of protection of the present invention.

Claims

1. A gas discharge tube manufacturing process, characterized in that: Used for manufacturing a gas discharge tube, the gas discharge tube comprising a discharge tube body and a lead, wherein the lead is parallel to an end surface of one end of the discharge tube body along the axial direction; The gas discharge tube manufacturing process comprises: Obtaining the discharge tube body; Obtaining a connection tape encapsulating a plurality of pairs of leads, wherein the leads are partially located outside the connection tape; clamping the discharge tube body with the same pair of lead wires, and welding the lead wires to the discharge tube body to obtain the gas discharge tube; Testing the gas discharge tubes to select qualified gas discharge tubes; Printing the qualified gas discharge tubes; The printed gas discharge tube is braided.

2. The gas discharge tube manufacturing process according to claim 1, characterized in that: The step of welding the lead wire to the discharge tube body comprises: immersing the lead wire and the discharge tube body in flux and then taking them out; preheating the lead wire and the discharge tube body; The lead wire and the discharge tube body are immersed in tin and then taken out.

3. The gas discharge tube manufacturing process according to claim 1, characterized in that: The leads include a pin portion and a welding portion connected to each other, the welding portion is located outside the connecting strip, and the welding portions of the same pair of leads intersect obliquely; The step of making the same pair of lead wires clamp the discharge tube body comprises: The welding portions of the same pair of lead wires are used to clamp the discharge tube body.

4. The gas discharge tube manufacturing process according to claim 3, characterized in that: The welding portion is arranged along the radial direction of the discharge tube body.

5. The gas discharge tube manufacturing process according to claim 1, characterized in that: The length of the discharge tube body along the axial direction is L, and L is less than or equal to 4 mm.

6. The process for manufacturing a gas discharge tube according to any one of claims 1 to 5, characterized in that: After the step of welding the lead wire to the discharge tube body, the method further includes: An insulating sealing layer is coated on the surfaces of the lead wire and the discharge tube body.

7. The gas discharge tube manufacturing process according to claim 6, characterized in that: The step of coating the surface of the lead wire and the discharge tube body with an insulating sealing layer comprises: preheating the lead wire and the discharge tube body; spraying or dipping the encapsulation material onto the surface of the lead wire and the discharge tube body; The lead wire and the discharge tube body are baked to solidify the encapsulation material to form the insulating encapsulation layer.

8. The gas discharge tube manufacturing process according to claim 7, characterized in that: The encapsulating material is epoxy resin or phenolic resin.

9. The process for manufacturing a gas discharge tube according to any one of claims 1 to 5, characterized in that: The discharge tube body includes a porcelain tube, a welding piece, and an end electrode. The welding pieces are arranged at both ends of the porcelain tube along the axial direction. The end electrode is arranged on the side of the welding piece facing away from the porcelain tube and is connected to the porcelain tube through the welding piece. The side of the end electrode facing the welding piece has a mesh surface. The step of obtaining the discharge tube body comprises: Coating a cathode emission layer on the grid surface of the terminal electrode; Installing the porcelain tube, the welding piece and the end electrode into the assembly hole of the graphite sealing mold; The graphite sealing mold is placed in a sealing furnace and sealed to form the discharge tube body.

10. The gas discharge tube manufacturing process according to claim 9, characterized in that: After the step of sealing to form the discharge tube body, the method further includes: applying a preset voltage to the discharge tube body to age the discharge tube body; Place the discharge tube body under a preset air pressure and check for leaks; An anti-oxidation conductive layer is electroplated on the surface of the terminal electrode.

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