Device and method for packaging ceramic glass vacuum electrodeless ultraviolet lamp

Abstract

The present invention discloses a device and method for packaging a ceramic glass vacuum electrodeless ultraviolet lamp. The device adopts a detachably connected first fixing seat, a second fixing seat and a third fixing seat, which can realize the clamping of the glass tube, window piece and ceramic lamp tube of the ceramic glass vacuum electrodeless ultraviolet lamp. When packaging is required, the glass tube, window piece and ceramic lamp tube are installed in sequence from bottom to top. During packaging, the packaging device will not contact the sealing surfaces of the glass tube, window piece and ceramic lamp tube, thereby avoiding the glass tube, window piece and ceramic lamp tube from adhering to the packaging device.

Description

Technical Field

[0001] The present invention relates to the technical field of electrodeless ultraviolet lamps, and in particular to a device and method for packaging a ceramic glass vacuum electrodeless ultraviolet lamp. Background Art

[0002] The vacuum ultraviolet light generated by the glow reaction of the vacuum electrodeless ultraviolet lamp is widely used in scientific analytical instruments related to mass spectrometry, spectroscopy, and photoionization detection, and plays an important role in environmental testing, medicine, new energy and other fields.

[0003] The principle of UV photoionization technology is to use a radio frequency electric field to stimulate a vacuum electrodeless UV lamp to emit vacuum UV light (wavelength 100-200nm). The high-energy vacuum UV light can ionize VOC (volatile organic compound) gas molecules, forming ions. Electrodes specifically designed to collect the ions are then introduced into a circuit, forming a current signal. After a series of circuit processing, the current signal is input as a voltage signal related to the VOC concentration, thus forming a relationship between the voltage signal and the VOC concentration signal. This relationship can be used to measure the VOC gas concentration. The core component of the vacuum electrodeless UV lamp generally includes a glass lamp body, a fluoride window (magnesium fluoride), and a getter located within the glass lamp body. The fluoride window is used to highly transmit vacuum UV light and seal the glass lamp body, while the getter is used to absorb any impurities in the lamp body. Common sealing processes for vacuum electrodeless UV lamps include: glass sealing agent sealing, metal brazing, hot pressing or hot melt welding, which ensure good airtightness and stability of the bulb after welding. Hot pressing or hot melt welding requires high material dimensional accuracy and special hot pressing or hot melt equipment, which is costly and has poor production stability. Metal brazing requires precise matching of the thermal expansion coefficients and curves of glass and magnesium fluoride. The process is relatively complex and requires a high sealing temperature, generally reaching above 800°, which is not suitable for welding materials with low softening points. The glass sealing agent sealing process is relatively simple, and sealants with different material ratios can match different thermal expansion coefficients, making it suitable for low-temperature sealing (<600°) and low-cost.

[0004] like Figure 1 As shown, there is currently a new type of ceramic glass vacuum electrodeless UV lamp (referring to the bulb, not including other parts such as the high-frequency generator and coupler), which includes a glass tube 1, a window 2, a ceramic lamp tube 3, and a getter 4. The ceramic lamp tube 3 is opaque and has openings at both ends. The window 2 and the glass tube 1 are sealed and connected to the openings at both ends of the ceramic lamp tube 3 to form a chamber, and the getter 4 is located in the chamber. Compared with conventional electrodeless UV lamps with ceramic lamp tube 3, this new type of electrodeless UV lamp requires the simultaneous sealing of the three components. The exploded structure before packaging is shown in the figure below. Figure 2As shown, sealing is difficult, and there is no suitable sealing device in the existing conventional welding furnace. The existing sealing device only has a fixing seat for the window piece 2 and the glass tube 1, which is only used for sealing the glass tube 1 and the window piece 2, and usually does not take into account the bonding problem between the sealing agent on the sealing plane and the sealing device. Therefore, there is an urgent need for a sealing device that can seal this new type of electrodeless ultraviolet lamp. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a device and method for packaging a ceramic glass vacuum electrodeless ultraviolet lamp that is easy to package.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A device for packaging a ceramic glass vacuum electrodeless ultraviolet lamp includes a first fixing seat, a second fixing seat, and a third fixing seat that are detachably connected from bottom to top. The first fixing seat is provided with a first mounting hole for mounting a window piece, the second fixing seat is provided with a second mounting hole for mounting a ceramic lamp tube, and the third fixing seat is provided with a third mounting hole for mounting a glass tube. The first mounting hole, the second mounting hole, and the third mounting hole are arranged in a one-to-one correspondence, and the central axes of the first mounting hole, the second mounting hole, and the third mounting hole are collinear.

[0008] As a further improvement of the above technical solution:

[0009] The utility model also comprises a counterweight platform which is pressed on the top of the glass tube.

[0010] A first protrusion is provided on the top of the first fixing seat, and a first recess is provided on the bottom of the second fixing seat. The first protrusion and the second fixing seat are matched with each other.

[0011] A second protrusion is provided on the top of the second fixing seat, and a second recess is provided on the bottom of the third fixing seat. The second protrusion and the second recess are matched in a concave-convex manner.

[0012] The second fixing seat is provided with a first groove and a second groove at the top and bottom of the second mounting hole respectively.

[0013] As a general inventive concept, the present invention also provides a method for packaging a ceramic glass vacuum electrodeless ultraviolet lamp, which is performed using the aforementioned ceramic glass vacuum electrodeless ultraviolet lamp packaging device and specifically includes the following steps:

[0014] S1, installing the window piece on the first mounting hole of the first fixing base;

[0015] S2, stacking the second fixing base on the first fixing base, and installing the ceramic lamp tube coated with a sealant on the end surface and pre-fired into the second mounting hole of the second fixing base;

[0016] S3, stacking the third fixing seat on the second fixing seat, installing the glass tube coated with a sealant on the end surface and pre-fired into the third mounting hole of the third fixing seat, and applying longitudinal pressure to the glass tube for sealing.

[0017] As a further improvement of the above technical solution:

[0018] In step S3, applying pressure to the glass tube includes pressing a counterweight platform onto the top of the glass tube.

[0019] In step S2, the ceramic lamp tube coated with a sealant on the end surface and pre-fired is prepared by the following steps:

[0020] P1, apply sealant to the end surface of the ceramic lamp tube close to the window piece, then place it on the first mounting hole of the first fixing seat for pre-burning and debinding;

[0021] P2, remove the ceramic lamp tube from the first mounting hole of the first fixing base;

[0022] In step S3, the glass tube coated with a sealing agent on the end surface and pre-fired is prepared by the following steps:

[0023] Q1: Apply sealant to the end surface of the glass tube near the neck and place it on the third and second fixing seats for pre-burning and debinding.

[0024] Q2, take out the glass tube from the third fixing seat and the second fixing seat.

[0025] Preferably, in step Q1, the lower end of the glass tube is placed on the second fixing seat via a counterweight.

[0026] As a general inventive concept, the present invention also provides a method for preparing a ceramic glass vacuum electrodeless ultraviolet lamp, comprising the following steps:

[0027] A1, using the above-mentioned packaging method to package and obtain the initial electrodeless ultraviolet lamp;

[0028] A2, clean and bake the electrodeless UV lamp, and then place it in a getter to fix it;

[0029] A3, vacuum the electrodeless UV lamp.

[0030] A4, heat the electrodeless UV lamp primary product;

[0031] A5, fill the electrodeless UV lamp with rare gas and wait until the gas is balanced;

[0032] A6, repeat steps A3 and A5 2-3 times;

[0033] A7, melting the glass tube of the initial electrodeless ultraviolet lamp at the neck portion to obtain the electrodeless ultraviolet lamp.

[0034] As a further improvement of the above technical solution:

[0035] In the step A2, the cleaning comprises the following steps:

[0036] B1, immerse the electrodeless UV lamp in hydrogen fluoride solution to corrode the glass weathering layer for chemical degassing;

[0037] B2, rinse the electrodeless UV lamp with water and then with anhydrous ethanol;

[0038] The temperature during the baking is 50-100°.

[0039] In the step A3, the vacuum degree in the electrodeless ultraviolet lamp after the vacuum treatment is less than 10 -5 Pa, the temperature of the ceramic lamp tube is 380-420°.

[0040] In step A6, the wall thickness of the glass tube at the necking portion is 0.8±0.1 mm, the angle at the necking portion is at least 90°-135°, and the inner diameter at the necking portion is 1±0.2 mm.

[0041] Compared with the prior art, the advantages of the present invention are:

[0042] The device for packaging a ceramic glass vacuum electrodeless ultraviolet lamp of the present invention adopts a detachably connected first fixing seat, a second fixing seat and a third fixing seat, which can realize the clamping of the glass tube, window piece and ceramic lamp tube of the ceramic glass vacuum electrodeless ultraviolet lamp. When packaging is required, the glass tube, window piece and ceramic lamp tube are installed in sequence from bottom to top. During packaging, the packaging device will not contact the sealing surfaces of the glass tube, window piece and ceramic lamp tube, thereby avoiding the glass tube, window piece and ceramic lamp tube from adhering to the packaging device.

[0043] The ceramic glass vacuum electrodeless ultraviolet lamp packaging method of the present invention adopts a packaging device for packaging and has the advantages of the packaging device.

[0044] The preparation method of the ceramic glass vacuum electrodeless ultraviolet lamp of the present invention performs cleaning of the ceramic lamp tube and the glass tube, chemical degassing (cleaning), high-temperature degassing (baking), gas replacement and sintering, thereby solving problems such as poor consistency, aesthetics, and bottom shrinkage, and improving the yield rate, significantly reducing the release of gas inside the glass tube, and preventing the entry of external gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is the final product structure diagram of the ceramic glass vacuum electrodeless ultraviolet lamp in the present invention.

[0046] Figure 2 The figure is a schematic diagram of the explosion structure of the ceramic glass vacuum electrodeless ultraviolet lamp before packaging in the present invention.

[0047] Figure 3 It is a structural schematic diagram of the ceramic lamp tube and the getter in the present invention.

[0048] Figure 4 It is a structural schematic diagram of the device for packaging a ceramic glass vacuum electrodeless ultraviolet lamp in the present invention.

[0049] Figure 5 It is a cross-sectional view of the device for packaging a ceramic glass vacuum electrodeless ultraviolet lamp in the present invention.

[0050] Figure 6 It is a cross-sectional view of the second fixing seat and the third fixing seat in the present invention.

[0051] Figure 7 It is a cross-sectional view of the first fixing seat in the present invention.

[0052] Figure 8 This is a schematic diagram of the installation structure of the ceramic lamp tube during pre-firing in Example 2 of the present invention.

[0053] Figure 9 This is a cross-sectional view of the installation of the ceramic lamp tube during pre-firing in Example 2 of the present invention.

[0054] Figure 10 This is a schematic diagram of the installation structure of the glass tube during pre-firing in Example 2 of the present invention.

[0055] Figure 11 This is a cross-sectional view of the glass tube during pre-firing in Example 2 of the present invention.

[0056] Figure 12 It is a process flow chart of Example 3 of the present invention.

[0057] Figure 13 It is a schematic diagram of the explosion structure during installation of the glass tube and the sealing tool in Example 3 of the present invention.

[0058] Figure 14 This is a schematic diagram of the installation of the glass tube and sealing tooling in Example 3 of the present invention.

[0059] The numbers in the figure represent:

[0060] 1. Glass tube; 2. Window piece; 3. Ceramic lamp tube; 31. Lamp tube body; 32. Clamping part; 33. Cone part; 4. Getter; 5. Second fixing seat; 51. Second mounting hole; 52. First recessed part; 53. Second raised part; 54. First groove; 55. Second groove; 6. First fixing seat; 61. First mounting hole; 62. First raised part; 7. Counterweight platform; 8. Third fixing seat; 81. Third mounting hole; 82. Second recessed part; 10. Sealing tool; 101. Fixing nut; 102. Pressing piece; 103. Sealing ring; 104. Exhaust pipe. DETAILED DESCRIPTION

[0061] The present invention will be described in further detail below. Unless otherwise specified, the instruments and materials used in the present invention are commercially available.

[0062] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0063] 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.

[0064] In the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," "fixed," etc. should be understood in a broad sense. 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 elements or interaction between two elements. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0065] Example 1

[0066] like Figures 1 to 3 As shown, the ceramic glass vacuum electrodeless ultraviolet lamp of this embodiment (referring to the bulb, not involving other parts such as high-frequency generator and coupler) includes a glass tube 1, a window 2, a ceramic lamp tube 3 and a getter 4 ( Figure 1(not shown), the ceramic lamp tube 3 is opaque and has openings at both ends. The window piece 2 and the glass tube 1 are sealed and connected to the openings at both ends of the ceramic lamp tube 3 to form a cavity, and the getter 4 is located in the cavity.

[0067] The getter 4 is stuck or bonded in the ceramic lamp tube 3, which can prevent most of the getter 4 material from being irradiated by ultraviolet light without affecting the getter 4's air absorption, reduce the probability of the getter 4 being sputtered by ions and ultraviolet oxidation, and increase the service life of the ultraviolet lamp.

[0068] The ceramic lamp 3 includes a main body 31 and a snap-fit ​​portion 32 at one end of the main body 31. The snap-fit ​​portion 32 is positioned near the glass tube 1. The getter 4 is folded and securely snapped into the snap-fit ​​portion 32 with a certain degree of resilience. The getter 4 is positioned away from the window 2, away from the snap-fit ​​portion 32. This prevents the getter 4 from interfering with the vacuum ultraviolet light transmission through the window 2 and significantly reduces UV exposure to the getter and ion sputtering.

[0069] Getter 4 is folded and locked within the locking portion 32 (which also serves as an exhaust channel in subsequent preparation methods). After folding, getter 4 has a certain degree of resilience, which is retained by friction generated by this resilience and the inner wall of the locking portion 32. The getter base is typically made of metal materials such as stainless steel and titanium. Getter 4 is a Ti-based, elongated strip with a width of less than 1 mm.

[0070] The engaging portion 32 is embedded in the glass tube 1 . One end of the lamp body 31 is connected to the glass tube 1 , and the other end is connected to the window piece 2 .

[0071] The ceramic lamp tube 3 also includes a truncated cone 33, which is located between the lamp body 31 and the engaging portion 32. The inner diameter of the truncated cone 33 is between the inner diameters of the engaging portion 32 and the inner diameter of the lamp body 31. The outer wall of the truncated cone 33 mates with the inner wall of the glass tube 1, and one end face of the lamp body 31 is sealed to one end face of the glass tube 1. In the present invention, the end faces of the glass tube 1 and the ceramic lamp tube 3 are coated with a sealant (conventional commercially available glass sealant), such as Figure 1 and Figure 2 Shown in yellow.

[0072] like Figures 4 to 7As shown, the device for packaging a ceramic glass vacuum electrodeless ultraviolet lamp of this embodiment includes a first fixing base 6, a second fixing base 5, and a third fixing base 8, which are detachably connected from bottom to top. The first fixing base 6 defines a first mounting hole 61 for mounting the window piece 2, the second fixing base 5 defines a second mounting hole 51 for mounting the ceramic lamp tube 3, and the third fixing base 8 defines a third mounting hole 81 for mounting the glass tube 1. The first mounting hole 61, the second mounting hole 51, and the third mounting hole 81 are arranged in a one-to-one correspondence, and the central axes of the first mounting hole 61, the second mounting hole 51, and the third mounting hole 81 are collinear. The outer walls of the window piece 2, the ceramic lamp tube 3, and the glass tube 1 respectively cooperate with the first mounting hole 61, the second mounting hole 51, and the third mounting hole 81. The packaging device of the present invention adopts a detachably connected first fixing seat 6, a second fixing seat 5 and a third fixing seat 8, which can realize the installation and clamping of the ceramic glass vacuum electrodeless ultraviolet lamp glass tube 1, the window piece 2, and the ceramic lamp tube 3. When packaging is required, the glass tube 1, the window piece 2, and the ceramic lamp tube 3 can be installed in sequence from bottom to top. During packaging, the packaging device will not contact the sealing surfaces of the glass tube 1, the window piece 2, and the ceramic lamp tube 3, thereby avoiding the glass tube 1, the window piece 2, and the ceramic lamp tube 3 from adhering to the packaging device.

[0073] In this embodiment, the glass tube 1 is a glass tube 1 with a necking before packaging. The necking portion is suitable for subsequent flame melting. The wall thickness of the necking portion is 0.8±0.1 mm, and the necking angle is 90°-135° ( Figure 11 The inner diameter of the glass at the necking is 1±0.2 mm. The necking wall thickness and angle can reduce the glass melting speed, thereby improving consistency and yield rate, and avoiding the problem of gas leakage caused by excessive glass shrinkage. The slow melting of the glass can effectively reduce the gas generated by the melting of the glass.

[0074] This embodiment also includes a counterweight platform 7, which is pressed against the top of the glass tube 1. The presence of the counterweight platform 7 allows the glass tube 1 to be sealed by applying pressure due to its own weight. Different weights can be placed depending on the required seal strength. Furthermore, the platform facilitates pre-firing of the sealant before the glass tube 1 is officially packaged. In this embodiment, the counterweight platform 7 refers to a counterweight.

[0075] In this embodiment, the ceramic lamp tube 2 is inverted (the lamp tube body 31 is at the bottom and the locking portion 32 is at the top), and the neck of the glass tube 1 is placed close to the ceramic lamp tube 2 .

[0076] In this embodiment, the first mounting hole 61 of the first fixing base 6 is a stepped hole that passes through the upper and lower surfaces of the first fixing base 6 . The diameter of the upper hole of the stepped hole is larger than the diameter of the lower hole. The inner wall of the upper hole matches the outer wall of the window piece 2 .

[0077] In this embodiment, a first protrusion 62 is provided on the top of the first fixing seat 6 , and a first recess 52 is provided on the bottom of the second fixing seat 5 . The first protrusion 62 and the second fixing seat 5 are matched with each other in a concave-convex manner.

[0078] In this embodiment, a second protrusion 53 is provided on the top of the second fixing seat 5, and a second recess 82 is provided on the bottom of the third fixing seat 8. The second protrusion 53 and the second recess 82 are matched with each other. The second fixing seat 5, the third fixing seat 8, and the first fixing seat 6 are connected by a stacked mortise and tenon structure. In other embodiments, other detachable connection methods, such as screws and bolts, can be used to achieve similar technical effects.

[0079] In this embodiment, the second fixing seat 5 is provided with a first groove 54 and a second groove 55 at the top and bottom of the second mounting hole 51, respectively. The first groove 54 and the second groove 55 are used to release the sealant that is not completely vitrified during high-temperature sealing. The provision of the first groove 54 is also convenient for pre-firing the glass tube 1 before formal packaging.

[0080] In this embodiment, the top and bottom of the counterweight are provided with an upper and lower platform, which are not directly connected. The inner diameters of the upper and lower platforms match the outer diameter of the glass tube 1, and the outer diameter of the counterweight is no larger than the size of the first groove 54. When longitudinal pressure needs to be applied to the glass tube 1, the upper or lower platform of the counterweight is clamped to the outer circumference of the glass tube 1, and the pressure is applied to the glass tube 1 by the weight of the counterweight. When the glass tube 1 needs to be pre-burned, the counterweight is placed in the first groove 54 and the upper or lower platform is used to clamp the glass tube 1 to secure it. In other embodiments, the counterweight can have only one upper or lower platform, and similar technical effects can also be achieved.

[0081] Example 2

[0082] The packaging method of the ceramic glass vacuum electrodeless ultraviolet lamp of this embodiment is performed using the ceramic glass vacuum electrodeless ultraviolet lamp packaging device of the first embodiment, and specifically includes the following steps:

[0083] S1, install the window piece 2 on the first mounting hole 61 of the first fixing base 6;

[0084] S2, stack the second fixing base 5 on the first fixing base 6, and install the ceramic lamp tube 3, which has been coated with a sealant and pre-fired on its end surface, into the second mounting hole 51 of the second fixing base 5. At this time, the ceramic lamp tube 3 is inverted, with the lamp tube body 31 located in the second mounting hole 51 and the engaging portion 32 located above the lamp tube body 31.

[0085] S3: The third fixing base 8 is stacked on the second fixing base 5. The glass tube 1, which has been coated with sealant and pre-fired, is installed in the third mounting hole 81 of the third fixing base 8. A longitudinal pressure is applied to the glass tube 1 to seal it. At this point, the end of the glass tube 1 near the neck is at the bottom, and the end away from the neck is at the top.

[0086] In this embodiment, the pre-firing treatment of the glass tube 1 and the ceramic lamp tube 3 specifically includes the following steps:

[0087] P1, print the sealant (prepared glass powder paste) on the end surface of the glass tube 1 near the neck and the end surface of the ceramic lamp tube 3 near the window, and place them between the third fixing seat 8 and the second fixing seat 5 and on the first fixing seat 6 respectively. Figures 8 to 11 As shown, the ceramic lamp tube 3 (upright, with the lamp tube body 31 on top, the clamping part 32 at the bottom, the end face of the ceramic lamp tube 3 coated with the sealant facing upward, the clamping part 32 of the ceramic lamp tube 3 located in the first mounting hole 61 and the lamp tube body 31 protruding upward relative to the upper surface of the first fixing seat 6) is placed on the first fixing seat 6 for pre-firing, and the glass tube 1 (upright, with the end face of the glass tube 1 close to the neck facing upward and protruding upward relative to the upper surface of the third fixing seat 8, the other end of the glass tube 1 connected to the second fixing seat 5 through a counterweight, and the counterweight is placed in the first groove 54) is placed between the third fixing seat 8 and the second fixing seat 5 for pre-firing and debinding of the sealant. The pre-firing process makes the sealant as completely vitrified as possible (in practice, complete vitrification is generally not achieved, but it is as vitrified as possible).

[0088] P2. Remove the ceramic lamp tube 3 from the first mounting base 6 to facilitate installation of the window 2. Remove the glass tube 1 from the second mounting base 5. This is necessary because the glass tube 1 and ceramic lamp tube 3 must be inverted during pre-firing and sealing. This pre-firing does not include the window 2, which does not require pre-firing.

[0089] In this embodiment, the outer diameter of the ceramic lamp tube 3 is the same as that of the window piece 2, and the ceramic lamp tube 3 can also fit well with the first mounting hole 61 of the first fixing seat 6, so the first fixing seat 6 is directly used for fixing during pre-burning and debinding. During the pre-burning stage, the packaging device simultaneously pre-burns and debinds the sealants on the glass tube 1 and the ceramic tube 3. In other embodiments, the ceramic lamp tube 3 can be fixed with other similar fixing seats and then pre-burned and debinded.

[0090] Since the pre-firing process makes the sealant vitrified as much as possible, complete vitrification will lead to poor fluidity of the sealant at high temperatures. Therefore, the sealing device of the present invention is further equipped with a counterweight platform 7 to apply pressure, so that good sealing can be achieved even with poor fluidity.

[0091] In this embodiment, in step S2 , the ceramic lamp tube 3 with the end surface coated with the sealing agent is prepared by the following process: first, the end surface of the ceramic lamp tube 3 close to the window 2 is coated with the sealing agent.

[0092] In this embodiment, in step S3 , applying pressure to the glass tube 1 includes pressing the counterweight platform 7 onto the top of the glass tube 1 .

[0093] Example 3

[0094] like Figure 12 As shown, the preparation method of the ceramic glass vacuum electrodeless ultraviolet lamp of this embodiment includes the following steps:

[0095] A1, using the packaging method of Example 2 to encapsulate and obtain a primary electrodeless ultraviolet lamp;

[0096] A2, clean and bake the electrodeless UV lamp, and then place it in a getter to fix it;

[0097] A3, vacuum the electrodeless UV lamp.

[0098] A4, heat the electrodeless UV lamp primary product;

[0099] A5, initially fill the electrodeless UV lamp with rare gas, stop the rare gas flow, and wait for 1 hour until the gas balance;

[0100] A6, repeat steps A3 and A5 2-3 times to perform gas replacement;

[0101] A7, melting the glass tube 1 of the initial electrodeless ultraviolet lamp at the neck portion to obtain the electrodeless ultraviolet lamp.

[0102] The preparation method of the present invention performs cleaning, chemical degassing (cleaning), high-temperature degassing (baking), gas replacement and sintering of the ceramic lamp tube 3 and the glass tube 1, thereby solving problems such as poor consistency, aesthetics, and bottom shrinkage, and improving the yield rate, significantly reducing the release of gas inside the glass tube 1, and preventing external gas from entering.

[0103] In this embodiment, in step A2, cleaning includes the following steps:

[0104] B1. Immerse the electrodeless UV lamp in a hydrogen fluoride solution to corrode the glass weathering layer for chemical degassing. In this embodiment, immerse the lamp in a 1% hydrogen fluoride solution for 30 minutes.

[0105] B2: Rinse the electrodeless UV lamp with pure water and then with anhydrous ethanol. In this example, a long-nosed syringe is used to inject pure water for rinsing, followed by anhydrous ethanol for final rinsing. Clean tweezers are used throughout the entire process. In this example, pure water is used to wash away the hydrofluoric acid, while ethanol is used to remove small amounts of organic matter (such as oil) that is difficult for hydrofluoric acid to dissolve. Another important purpose is to absorb water.

[0106] In step A2, the baking temperature is 50-100°C (70°C in this example) in a dust-free oven. Clean tweezers and a clean stainless steel work surface are used during the baking process. The purpose of the baking process is to quickly remove the ethanol and water.

[0107] In this embodiment, in step A3, the vacuum degree in the electrodeless ultraviolet lamp after vacuum treatment is less than 10 -5 During the heating process, the heating temperature of the entire lamp tube (electrodeless ultraviolet bulb) is 380-420°C (400°C in this embodiment) and lasts for at least 2-4 hours (4 hours in this embodiment). During the heating process, the temperature of the vacuum pipe of the vacuum pumping device is kept within 100-120°C, which is conducive to improving the vacuum degree.

[0108] In step A3, the vacuum degree in the vacuum chamber of the bulb reaches at least 10 -5 ~10 -6 Pa, and the vacuum chamber has Figures 13 to 14 The sealing tool 10 shown in the figure realizes the vacuuming of the glass tube 1, and the vacuuming reaches 10 -5 Pa, the vacuum chamber and the engaging portion 32 are heated for 2 hours at a temperature of 100-120°C. Simultaneously, a heater is used to heat the ceramic lamp body 3 for 4 hours at a temperature of 380-420°C. The heating effect is similar to that of hydrofluoric acid, removing the weathered layer on the inner wall and discharging gases from the inner glass wall at high temperature.

[0109] The sealing tool 10 includes a fixing nut 101, a pressing piece 102, a sealing ring 103, and an exhaust pipe 104. The fixing nut 101 is provided with an inner hole, one side of the inner hole is provided with an internal thread, and the other side is provided with a limiting portion for limiting the movement of the pressing piece 102. One end of the exhaust pipe 104 is provided with an external thread, and the internal thread and the external thread match each other. The pressing piece 102 is sleeved on the glass tube 1 and is located in the inner hole of the fixing nut 101, and one end is in contact with the limiting portion. The sealing ring 103 is located between the exhaust pipe 104 and the glass tube 1. The rotating exhaust pipe 104 presses the pressing piece 102 tightly against the limiting portion to achieve a sealed connection between the glass tube 1 and the vacuum device.

[0110] In this embodiment, the sealing ring 103 in the sealing tool 10 is a fluororubber ring, which is sleeved on the outer wall of the glass tube 1. The fixing nut 101 is a square nut, and the pressing piece 102 is a stainless steel pressing piece. After tightening the square nut, the stainless steel pressing piece is pressed tightly to compress the fluororubber ring and complete the fixation and vacuum sealing of the prototype workpiece. After degassing is completed, the glass tube is melted.

[0111] In step A5, the rare gas is filled into the vacuum chamber of the bulb, and at least two rounds of rare gas replacement are performed. Each round of replacement requires waiting for the gas to balance for 1-2 hours. After the replacement is completed, the gas needs to be pumped again. Finally, the rare gas is filled into the vacuum chamber according to the required pressure and the gas is waited for 30 minutes to balance.

[0112] In step A7, the glass can be melted manually using an oxyhydrogen flame machine and a flame gun to melt and seal the glass tube 1 at the neck, and the flame temperature can be adjusted by adding petroleum ether. In other embodiments, coal-oxygen flame can be used for melting, and the flame temperature can be adjusted by adjusting the oxygen amount.

[0113] Step A6 also includes sintering the glass tube 1 and the ceramic lamp tube 3. The glass tube 1 melts at high temperature and shrinks under the condition of internal vacuum and external air. The sintering is continued until the glass tube 1 shrinks to the clamping portion 32 of the ceramic lamp tube 3 and is bonded to the ceramic lamp tube 3 (when the glass tube 1 melts, it can cover the outer wall of the frustum portion 33 and the clamping portion 32, so that the sealing between the glass tube 1 and the ceramic lamp tube 3 is better), and finally the sealing is completed.

[0114] Although the present invention has been disclosed above with reference to preferred embodiments, this is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, utilize the technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the scope of protection of the technical solution of the present invention.

Claims

1. A device for packaging a ceramic glass vacuum electrodeless ultraviolet lamp, characterized in that: The invention comprises a first fixing seat (6), a second fixing seat (5) and a third fixing seat (8) which are detachably connected in sequence from bottom to top, wherein the first fixing seat (6) is provided with a first mounting hole (61) for mounting a window sheet (2), the second fixing seat (5) is provided with a second mounting hole (51) for mounting a ceramic lamp tube (3), and the third fixing seat (8) is provided with a third mounting hole (81) for mounting a glass tube (1), wherein the first mounting hole (61), the second mounting hole (51) and the third mounting hole (81) are arranged in a one-to-one correspondence and the central axes of the first mounting hole (61), the second mounting hole (51) and the third mounting hole (81) are collinear; The first mounting hole (61) passes through the upper and lower surfaces of the first fixing seat (6); the second mounting hole (51) passes through the upper and lower surfaces of the second fixing seat (5); and the third mounting hole (81) passes through the upper and lower surfaces of the third fixing seat (8); The device for packaging a ceramic glass vacuum electrodeless ultraviolet lamp further comprises a counterweight platform (7), which is pressed against the top of the glass tube (1) and is used to apply longitudinal pressure to the glass tube (1) to achieve sealing agent packaging of the end faces between the window piece (2) and the ceramic lamp tube (3) and between the ceramic lamp tube (3) and the glass tube (1).

2. The device for packaging a ceramic glass vacuum electrodeless ultraviolet lamp according to claim 1, characterized in that: A first protrusion (62) is provided on the top of the first fixing seat (6), and a first recess (52) is provided on the bottom of the second fixing seat (5), wherein the first protrusion (62) and the second fixing seat (5) are matched in a concave-convex manner.

3. The device for packaging a ceramic glass vacuum electrodeless ultraviolet lamp according to claim 1, characterized in that: A second protrusion (53) is provided on the top of the second fixing seat (5), and a second recess (82) is provided on the bottom of the third fixing seat (8), wherein the second protrusion (53) and the second recess (82) are matched in a concave-convex manner.

4. The device for packaging a ceramic glass vacuum electrodeless ultraviolet lamp according to claim 1, wherein: The second fixing seat (5) is provided with a first groove (54) and a second groove (55) at the top and bottom of the second mounting hole (51), respectively.

5. A packaging method for a ceramic glass vacuum electrodeless ultraviolet lamp, characterized in that: The method is carried out using the ceramic glass vacuum electrodeless ultraviolet lamp packaging device according to any one of claims 1 to 4, specifically The following steps are involved: S1, installing the window piece (2) on the first mounting hole (61) of the first fixing seat (6); S2, stacking the second fixing seat (5) on the first fixing seat (6), and installing the ceramic lamp tube (3) coated with a sealant on the end surface and pre-fired into the second mounting hole (51) of the second fixing seat (5); S3, stacking the third fixing seat (8) on the second fixing seat (5), installing the glass tube (1) coated with a sealant on the end surface and pre-fired in the third mounting hole (81) of the third fixing seat (8), and applying longitudinal pressure to the glass tube (1) for sealing.

6. The packaging method according to claim 5, wherein: In step S3, applying pressure to the glass tube (1) includes pressing a counterweight platform (7) onto the top of the glass tube (1); In step S2, the ceramic lamp tube (3) coated with a sealing agent on the end surface and pre-fired is prepared by the following steps: P1, coating the end surface of the ceramic lamp tube (3) with a sealant and placing it on the first mounting hole (61) of the first fixing seat (6) for pre-firing and debonding; P2, remove the ceramic lamp tube (3) from the first mounting hole (61) of the first fixing seat (6); In step S3, the glass tube (1) coated with a sealing agent on the end surface and pre-fired is prepared by the following steps: Q1, coating the end surface of the glass tube (1) with a sealant and placing it on the third fixing seat (8) and the second fixing seat (5) for pre-firing and debinding; Q2, take the glass tube (1) out of the third fixing seat (8) and the second fixing seat (5).

7. A method for preparing a ceramic glass vacuum electrodeless ultraviolet lamp, characterized in that: The following steps are involved: A1, encapsulating by the encapsulation method according to claim 5 or 6 to obtain a primary electrodeless ultraviolet lamp; A2, clean and bake the electrodeless UV lamp, and then place it in a getter to fix it; A3, vacuum the electrodeless UV lamp. A4, heat the electrodeless UV lamp primary product; A5, fill the electrodeless UV lamp with rare gas and wait until the gas is balanced; A6, repeat steps A3 and A5 2-3 times; A7, melting the glass tube (1) of the initial electrodeless ultraviolet lamp at the neck portion to obtain the electrodeless ultraviolet lamp.

8. The preparation method according to claim 7, characterized in that: In the step A2, the cleaning comprises the following steps: B1, immerse the electrodeless UV lamp in hydrogen fluoride solution to corrode the glass weathering layer for chemical degassing; B2, rinse the electrodeless UV lamp with water and then with anhydrous ethanol; The temperature during the baking is 50-100°.

9. The preparation method according to claim 7, wherein: In the step A3, the vacuum degree in the electrodeless ultraviolet lamp after the vacuum treatment is less than 10 -5 Pa, the temperature of the ceramic lamp tube (3) is 380-420°; In step A6, the wall thickness of the glass tube (1) at the necking portion is 0.8±0.1 mm, the angle at the necking portion is 90°-135°, and the inner diameter at the necking portion is 1±0.2 mm.

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