Device and method for packaging ceramic glass vacuum electrodeless ultraviolet lamp

Abstract

The invention discloses a device and method for packaging a ceramic glass vacuum electrodeless ultraviolet lamp, and the device employs a first fixed seat, a second fixed seat and a third fixed seat which are detachably connected, and can achieve the clamping of a glass tube, a diaphragm and a ceramic lamp tube of the ceramic glass vacuum electrodeless ultraviolet lamp. The glass tube, the window sheet and the ceramic lamp tube are sequentially installed from bottom to top, the packaging device does not make contact with the sealing faces of the glass tube, the window sheet and the ceramic lamp tube in the packaging process, and the glass tube, the window sheet and the ceramic lamp tube are prevented from being bonded to the packaging device.

Description

Technical Field

[0001] The 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 produced by the glow reaction of vacuum electrodeless ultraviolet lamp is widely used in scientific analysis 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 ultraviolet photoionization technology is: using radio frequency electric field to stimulate a vacuum electrodeless ultraviolet lamp to emit vacuum ultraviolet light (wavelength 100~200nm). High-energy vacuum ultraviolet light can ionize VOC (volatile organic compound) gas molecules. The ionized gas molecules will form ions. Electrodes specially used to collect ions are used to collect ions and introduce them into the circuit to form a current signal. After a series of circuit processing, the current signal is input into a voltage signal related to the VOC concentration, thereby forming a relationship between the voltage signal and the VOC concentration signal. Using this relationship, the gas concentration of VOC can be measured. The core component, the vacuum electrodeless ultraviolet lamp, generally includes a glass lamp body, a fluoride window (magnesium fluoride) and a getter located in the glass lamp body. The fluoride window is used to highly transmit vacuum ultraviolet light and seal the glass lamp body. The getter is used to absorb impurity gases that may exist in the lamp body. The commonly used sealing processes for vacuum electrodeless UV lamps are: glass sealant sealing process, metal brazing process, hot pressing or hot melt welding process, which make the bulb have good airtightness and stability after welding. Hot pressing or hot melt welding has high requirements on material dimensional accuracy and requires specific hot pressing or hot melt equipment, which is costly and has poor production stability. Metal brazing requires precise matching of the thermal expansion coefficient and curve of glass and magnesium fluoride. The process is relatively complex and requires a higher sealing temperature, generally reaching more than 800°, which is not suitable for welding materials with low softening points. The glass sealant sealing process is relatively simple, and sealants with different material ratios can match different thermal expansion coefficients, which is 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 ultraviolet lamp (referring to the bulb, not involving other parts such as high-frequency generators and couplers), including a glass tube 1, a window piece 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 piece 2 and the glass tube 1 are respectively 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 the conventional electrodeless ultraviolet lamp with a ceramic lamp tube 3, this new type of electrodeless ultraviolet bulb requires three parts to be sealed at the same time. The exploded structure before packaging is shown in the figure below. Figure 2As shown, the 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 consider 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 which is easy to package.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: A device for packaging a ceramic glass vacuum electrodeless ultraviolet lamp comprises a first fixing seat, a second fixing seat and a third fixing seat which are detachably connected in sequence from bottom to top, the first fixing seat being provided with a first mounting hole for mounting a window piece, the second fixing seat being provided with a second mounting hole for mounting a ceramic lamp tube, the third fixing seat being provided with a third mounting hole for mounting a glass tube, the first mounting hole, the second mounting hole and the third mounting hole being arranged in one-to-one correspondence and the central axes of the first mounting hole, the second mounting hole and the third mounting hole being collinear.

[0007] As a further improvement of the above technical solution: The utility model also comprises a counterweight platform, wherein the counterweight platform is pressed on the top of the glass tube.

[0008] 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.

[0009] 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.

[0010] The second fixing seat is provided with a first groove and a second groove at the top and the bottom of the second mounting hole respectively.

[0011] 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 comprises the following steps: S1, installing the window sheet on the first mounting hole of the first fixing seat; S2, stacking the second fixing seat on the first fixing seat, and installing the ceramic lamp tube coated with a sealing agent on the end surface and pre-fired into the second mounting hole of the second fixing seat; 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 in the third mounting hole of the third fixing seat, and applying longitudinal pressure to the glass tube for packaging.

[0012] As a further improvement of the above technical solution: In the step S3, applying pressure to the glass tube includes pressing a counterweight platform onto the top of the glass tube.

[0013] In step S2, the ceramic lamp tube 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 close to the window piece with a sealant, and then placing the ceramic lamp tube on the first mounting hole of the first fixing seat for pre-burning and debinding; P2, remove the ceramic lamp tube from the first mounting hole of the first fixing base; In step S3, the glass tube 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 near the neck with a sealant and placing it on the third fixing seat and the second fixing seat for pre-burning and debinding; Q2, take out the glass tube from the third fixing seat and the second fixing seat.

[0014] Preferably, in step Q1, the lower end of the glass tube is placed on the second fixing seat via a counterweight.

[0015] 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: A1, using the aforementioned packaging method to package and obtain a primary electrodeless ultraviolet lamp; A2, clean and bake the electrodeless UV lamp, and put it into the getter to fix it; A3, vacuumize the electrodeless UV lamp. A4, heating the electrodeless ultraviolet 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 of the initial electrodeless ultraviolet lamp at the neck portion to obtain the electrodeless ultraviolet lamp.

[0016] As a further improvement of the above technical solution: In step A2, the cleaning comprises the following steps: B1, soak 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°.

[0017] In 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°.

[0018] 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.

[0019] Compared with the prior art, the advantages of the present invention are: The device for packaging a ceramic glass vacuum electrodeless ultraviolet lamp of the present invention adopts a first fixing seat, a second fixing seat and a third fixing seat that are detachably connected, and can realize the clamping of the glass tube, the window piece and the ceramic lamp tube of the ceramic glass vacuum electrodeless ultraviolet lamp. When packaging is required, the glass tube, the window piece and the 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, the window piece and the ceramic lamp tube, thereby avoiding the glass tube, the window piece and the ceramic lamp tube from adhering to the packaging device.

[0020] 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.

[0021] The preparation method of the ceramic glass vacuum electrodeless ultraviolet lamp of the present invention performs cleaning, chemical degassing (cleaning), high-temperature degassing (baking), gas replacement and sintering of the ceramic lamp tube and the glass tube, solves the problems of poor consistency, aesthetics, bottom shrinkage, etc., improves the yield rate, greatly reduces the release of gas inside the glass tube, and avoids the entry of external gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is the final product structure diagram of the ceramic glass vacuum electrodeless ultraviolet lamp in the present invention.

[0023] Figure 2 It is a schematic diagram of the explosion structure of the ceramic glass vacuum electrodeless ultraviolet lamp before packaging in the present invention.

[0024] Figure 3 It is a schematic diagram of the structure of the ceramic lamp tube and the getter in the present invention.

[0025] Figure 4 It is a structural schematic diagram of a device for packaging a ceramic glass vacuum electrodeless ultraviolet lamp in the present invention.

[0026] Figure 5It is a cross-sectional view of a device for packaging a ceramic glass vacuum electrodeless ultraviolet lamp in the present invention.

[0027] Figure 6 It is a cross-sectional view of the second fixing seat and the third fixing seat in the present invention.

[0028] Figure 7 It is a cross-sectional view of the first fixing seat in the present invention.

[0029] Figure 8 It is a schematic diagram of the installation structure of the ceramic lamp tube during pre-burning in the second embodiment of the present invention.

[0030] Fig. 9 It is a cross-sectional view of the installation of the ceramic lamp tube during pre-burning in Example 2 of the present invention.

[0031] Fig.10 It is a schematic diagram of the installation structure of the glass tube during pre-firing in Example 2 of the present invention.

[0032] Fig.11 It is a cross-sectional view of the glass tube during pre-firing in Example 2 of the present invention.

[0033] Fig.12 It is a process flow chart of embodiment 3 of the present invention.

[0034] Fig.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.

[0035] Fig.14 It is a schematic diagram of the installation of the glass tube and the sealing tool in the third embodiment of the present invention.

[0036] The symbols in the figure represent: 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

[0037] The present invention will be described in further detail below. Unless otherwise specified, the instruments or materials used in the present invention are commercially available.

[0038] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “top”, “bottom”, “inside” and “outside” are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply 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.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Embodiment 1 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 sheet 2, a ceramic lamp tube 3 and a getter 4 ( Figure 1 (not shown in the figure), the ceramic lamp tube 3 is opaque and has openings at both ends. The window piece 2 and the glass tube 1 are respectively 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.

[0042] The getter 4 is stuck or bonded in the ceramic lamp tube 3, which can prevent most of the getter 4 materials from being irradiated by ultraviolet light without affecting the getter 4's air intake, reduce the probability of the getter 4 being sputtered by ions and oxidized by ultraviolet light, and increase the service life of the ultraviolet lamp.

[0043] The ceramic lamp tube 3 includes a lamp tube body 31 and a clamping portion 32 located at one end of the lamp tube body 31. The clamping portion 32 is arranged close to one side of the glass tube 1. The getter 4 is fixedly clamped in the clamping portion 32 by folding with a certain resilience. The getter 4 is located at the clamping portion 32 away from the window sheet 2 to prevent the getter 4 from affecting the vacuum ultraviolet light transmittance at the window sheet 2, and greatly reduce the irradiation of ultraviolet light on the getter and ion sputtering.

[0044] The getter 4 is folded and clamped in the clamping part 32 (which can also be used as an exhaust channel in the subsequent preparation method). After being folded, the getter 4 has a certain rebound, and is fixed by the rebound and the friction generated by the inner wall of the clamping part 32. Generally, metal materials such as stainless steel and titanium are used as the base material of the getter. The getter 4 uses a Ti-based long strip getter with a width of less than 1 mm.

[0045] The engaging portion 32 is embedded in the glass tube 1 . One end of the lamp tube body 31 is connected to the glass tube 1 , and the other end is connected to the window piece 2 .

[0046] The ceramic lamp tube 3 further includes a truncated cone portion 33, which is located between the lamp tube body 31 and the clamping portion 32, and the inner diameter of the truncated cone portion 33 is between the inner diameter of the clamping portion 32 and the inner diameter of the lamp tube body 31. The outer wall of the truncated cone portion 33 matches the inner wall of the glass tube 1, and one end face of the lamp tube body 31 is sealed and connected 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 sealing agent (conventional commercially available glass sealing agent), such as Figure 1 and Figure 2 Shown in yellow.

[0047] like Figures 4 to 7 As shown, the ceramic glass vacuum electrodeless ultraviolet lamp packaging device of this embodiment includes a first fixing seat 6, a second fixing seat 5 and a third fixing seat 8 which are detachably connected from bottom to top, the first fixing seat 6 is provided with a first mounting hole 61 for mounting the window sheet 2, the second fixing seat 5 is provided with a second mounting hole 51 for mounting the ceramic lamp tube 3, and the third fixing seat 8 is provided with 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 one by one 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 sheet 2, the ceramic lamp tube 3 and the glass tube 1 are matched with the first mounting hole 61, the second mounting hole 51 and the third mounting hole 81 respectively. 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 a ceramic glass vacuum electrodeless ultraviolet lamp glass tube 1, a window piece 2, and a 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.

[0048] In this embodiment, the glass tube 1 is used with a constricted glass tube 1 before packaging. The constricted glass tube is suitable for subsequent flame melting. The wall thickness of the constricted glass tube is 0.8±0.1 mm, and the angle of the constricted glass tube is 90°-135° ( Fig.11The middle angle β is 135° in this embodiment), and 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 leakage caused by excessive shrinkage of the glass. The slow melting of the glass can effectively reduce the gas generated by the melting of the glass.

[0049] In this embodiment, a counterweight platform 7 is also included, and the counterweight platform 7 is pressed on the top of the glass tube 1. Through the arrangement of the counterweight platform 7, on the one hand, the glass tube 1 is sealed by the weight of the counterweight platform 7, and different weights can be placed according to the required sealing strength. On the other hand, it is convenient to pre-burn the sealing agent before the formal packaging of the glass tube 1. In this embodiment, the counterweight platform 7 refers to the counterweight.

[0050] 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 one side of the ceramic lamp tube 2 .

[0051] In this embodiment, the first mounting hole 61 of the first fixing seat 6 is a stepped hole that passes through the upper and lower surfaces of the first fixing seat 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 sheet 2 .

[0052] 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.

[0053] In this embodiment, a second protrusion 53 is provided on the top of the second fixing seat 5, and a second recessed portion 82 is provided on the bottom of the third fixing seat 8, and the second protrusion 53 and the second recessed portion 82 are matched with each other. The second fixing seat 5, the third fixing seat 8, and the first fixing seat 6 are stacked and connected by a mortise and tenon structure. In other embodiments, other detachable connection methods, such as screw and bolt connection, can be used to achieve similar technical effects.

[0054] 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 for degassing of the sealant that is not completely vitrified during high-temperature sealing. The provision of the first groove 54 is also convenient for pre-burning the glass tube 1 before formal packaging.

[0055] In this embodiment, an upper sinking platform and a lower sinking platform are provided at the top and bottom of the counterweight, and the upper sinking platform and the lower sinking platform are not directly connected. The inner diameters of the upper sinking platform and the lower sinking platform match the outer diameter of the glass tube 1, and the outer diameter of the counterweight is not larger than the size of the first groove 54. When it is necessary to apply longitudinal pressure to the glass tube 1, the upper sinking platform or the lower sinking platform of the counterweight is clamped on 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 it is necessary to pre-burn the glass tube 1, the counterweight is placed in the first groove 54 and the upper sinking platform or the lower sinking platform is used to clamp the glass tube 1, so as to clamp and fix the glass tube 1. In other embodiments, the counterweight has only one upper sinking platform or one lower sinking platform, and similar technical effects can also be achieved.

[0056] Embodiment 2 The packaging method of the ceramic glass vacuum electrodeless ultraviolet lamp of this embodiment is carried out using the ceramic glass vacuum electrodeless ultraviolet lamp packaging device of the first embodiment, and specifically comprises the following steps: S1, installing the window sheet 2 on the first mounting hole 61 of the first fixing seat 6; S2, stack the second fixing seat 5 on the first fixing seat 6, and install 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; at this time, the ceramic lamp tube 3 is inverted, the lamp tube body 31 is located in the second mounting hole 51, and the clamping portion 32 is located above the lamp tube body 31; S3, stack the third fixing seat 8 on the second fixing seat 5, install the glass tube 1 coated with a sealant on the end surface and pre-fired into the third mounting hole 81 of the third fixing seat 8, and apply longitudinal pressure to the glass tube 1 for sealing. At this time, the end of the glass tube 1 close to the necking is at the bottom, and the end away from the necking is at the top. In this embodiment, the pre-firing treatment of the glass tube 1 and the ceramic lamp tube 3 specifically includes the following steps: P1, print the sealing agent (prepared glass powder slurry) 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 11As shown, the ceramic lamp tube 3 (upright, with the lamp tube body 31 on top, the snap-fitting part 32 at the bottom, the end face of the ceramic lamp tube 3 coated with the sealant facing upward, the snap-fitting 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 on the side 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 is 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, and 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).

[0057] P2, take out the ceramic lamp tube 3 from the first fixing seat 6 to facilitate the installation of the window piece 2, and take out the glass tube 1 from the second fixing seat 5. Because the glass tube 1 and the ceramic lamp tube 3 need to be inverted during pre-firing and sealing, they need to be taken out. The pre-firing does not include the window piece 2, and the window piece 2 does not need to be pre-firing.

[0058] 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 cooperate 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.

[0059] 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 also equipped with a counterweight platform 7 to apply pressure, so that good sealing can be achieved even with poor fluidity.

[0060] In this embodiment, in the step S2 , the ceramic lamp tube 3 with the sealing agent coated on the end surface is prepared by the following process: firstly, the sealing agent is coated on the end surface of the ceramic lamp tube 3 close to the window piece 2 .

[0061] 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 .

[0062] Embodiment 3 like Fig.12 As shown, the method for preparing the ceramic glass vacuum electrodeless ultraviolet lamp of this embodiment comprises the following steps: A1, encapsulating by the encapsulation method of Example 2 to obtain a primary electrodeless ultraviolet lamp; A2, clean and bake the electrodeless UV lamp, and put it into the getter to fix it; A3, vacuumize the electrodeless UV lamp. A4, heating the electrodeless ultraviolet lamp primary product; A5, fill the electrodeless UV lamp with rare gas, stop the rare gas, and wait for 1 hour until the gas is balanced; A6, repeat steps A3 and A5 2-3 times to perform gas replacement; A7, melting the glass tube 1 of the initial electrodeless ultraviolet lamp at the neck portion to obtain the electrodeless ultraviolet lamp.

[0063] 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, solves the problems of poor consistency, aesthetics, bottom shrinkage, etc., improves the yield rate, greatly reduces the release of gas inside the glass tube 1, and prevents the entry of external gas.

[0064] In this embodiment, in step A2, cleaning includes the following steps: B1, soak the electrodeless ultraviolet lamp in a hydrogen fluoride solution to corrode the glass weathering layer for chemical degassing; in this embodiment, 1% hydrogen fluoride solution is used for soaking for 30 minutes.

[0065] B2, rinse the electrodeless ultraviolet lamp with pure water and then with anhydrous ethanol; in this embodiment, use a long-mouthed needle to inject pure water for rinsing, and finally inject anhydrous ethanol for rinsing, and use clean tweezers throughout the process. In this embodiment, pure water is used to wash away hydrofluoric acid, and ethanol is used to remove a small amount of organic matter (such as oil) that is difficult to dissolve in hydrofluoric acid. Another important purpose is to absorb water.

[0066] In step A2, the baking temperature is 50-100° (70° in this embodiment) in a dust-free oven, and clean tweezers and a clean stainless steel material table are used during the process of placing the material in the dust-free oven. The purpose of baking is to remove ethanol and water in a short time.

[0067] In this embodiment, in step A3, the vacuum degree in the electrodeless ultraviolet lamp after vacuum treatment is less than 10 -5 Pa, the heating temperature of the entire lamp tube (electrodeless ultraviolet bulb) during the heating treatment is 380-420° (400° in this embodiment), which lasts for at least 2-4 hours (4 hours in this embodiment). During heating, the temperature of the vacuum pipeline of the vacuum pumping device is within 100-120°, which is conducive to improving the vacuum degree.

[0068] 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 14The 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 clamping part 32 are heated for 2 hours at a temperature of 100-120°, and the ceramic lamp body 3 is heated for 4 hours at a temperature of 380-420° using a heater. The effect of heating is the same as that of hydrofluoric acid, which removes the weathering layer on the inner wall and discharges the gas on the inner wall of the glass at a high temperature.

[0069] 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 exhaust pipe 104 is rotated to press the pressing piece 102 tightly against the limiting portion, thereby realizing a sealed connection between the glass tube 1 and the vacuum device.

[0070] 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 to compress the fluororubber ring and complete the fixation and vacuum sealing of the prototype workpiece. After degassing, the glass tube is melted.

[0071] In step A4, 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 re-evacuated. 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.

[0072] In step A6, 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 fire can be used for melting, and the flame temperature can be adjusted by adjusting the amount of oxygen.

[0073] 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 part 32 of the ceramic lamp tube 3 and is bonded to the ceramic lamp tube 3 (when the glass tube 1 is melted, it can be covered on the outer wall of the truncated cone part 33 and the clamping part 32, so that the sealing between the glass tube 1 and the ceramic lamp tube 3 is better), and finally the sealing is completed.

[0074] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should 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, the first fixing seat (6) being provided with a first mounting hole (61) for mounting a window sheet (2), the second fixing seat (5) being provided with a second mounting hole (51) for mounting a ceramic lamp tube (3), the third fixing seat (8) being provided with a third mounting hole (81) for mounting a glass tube (1), the first mounting hole (61), the second mounting hole (51) and the third mounting hole (81) being 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) being collinear.

2. The device for packaging a ceramic glass vacuum electrodeless ultraviolet lamp according to claim 1, characterized in that: It also comprises a counterweight platform (7), wherein the counterweight platform (7) is pressed onto the top of the glass tube (1).

3. 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); the first protrusion (62) and the second fixing seat (5) are matched in a concave-convex manner.

4. 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.

5. The device for packaging a ceramic glass vacuum electrodeless ultraviolet lamp according to claim 1, characterized in that: 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.

6. 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 5, specifically The following steps are involved: S1, mounting the window sheet (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 sealing agent on the end surface and subjected to a pre-sintering treatment in the second installation 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 sealing agent on the end surface and subjected to a pre-burning treatment in a third mounting hole (81) of the third fixing seat (8), and applying longitudinal pressure to the glass tube (1) for sealing.

7. The packaging method according to claim 6, characterized in that: In the step S3, applying pressure to the glass tube (1) comprises pressing a counterweight platform (7) onto the top of the glass tube (1); In the 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 sealing agent and placing the ceramic lamp tube (3) on the first mounting hole (61) of the first fixing seat (6) for pre-burning and debonding; P2, removing the ceramic lamp tube (3) from the first mounting hole (61) of the first fixing seat (6); In the step S3, the glass tube (1) having a sealing agent applied to the end surface and subjected to a pre-sintering treatment is prepared by the following steps: Q1, coating the end surface of the glass tube (1) with a sealing agent and placing the glass tube (1) on a third fixing seat (8) and a second fixing seat (5) for pre-burning and debinding; Q2, take the glass tube (1) out of the third fixing seat (8) and the second fixing seat (5).

8. 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 6 or 7 to obtain a primary electrodeless ultraviolet lamp; A2, clean and bake the electrodeless UV lamp, and put it into the getter to fix it; A3, vacuumize the electrodeless UV lamp. A4, heating the electrodeless ultraviolet 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 electrodeless ultraviolet lamp at the neck portion to obtain the electrodeless ultraviolet lamp.

9. The preparation method according to claim 8, characterized in that: In step A2, the cleaning comprises the following steps: B1, soak 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°.

10. The preparation method according to claim 8, characterized in that: In 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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