A high-pressure gas discharge lamp liquid nitrogen filling device and a filling method

Abstract

The application relates to a high-pressure gas lamp liquid nitrogen charging device and a charging method in the technical field of gas lamp manufacturing, wherein the high-pressure gas lamp liquid nitrogen charging device comprises a base and an upper cover, the base is provided with a first cavity with an upward opening, the upper cover is provided with a second cavity with a downward opening, the first cavity and the second cavity jointly form a containing cavity for containing a bulb, a through hole is arranged at the joint of the base and the upper cover and is used for allowing neck pipes at two ends of the bulb to pass out, a liquid nitrogen inlet is arranged at the top of the upper cover, and a sealing structure is arranged at the joint of the base and the upper cover. The high-pressure gas lamp liquid nitrogen charging device and the charging method can improve the freezing effect on the bulb, provide a low-temperature environment close to the temperature of liquid nitrogen, increase the charging amount and expand the applicable charging types, reduce the influence on the fusion of a charging pipe, and improve the product yield.

Description

Technical Field

[0001] This application relates to the field of gas lamp manufacturing technology, and in particular to a liquid nitrogen filling device and filling method for a high-pressure gas lamp. Background Technology

[0002] High-pressure gas lamps belong to the category of gas discharge lamps. They utilize arc discharge between electrodes to excite high-pressure inert gas or metal vapor inside the lamp tube to produce high-intensity light. The gas filling pressure inside a high-pressure gas lamp must be above 10 bar. Currently, they mainly use an upward-opening liquid nitrogen container to condense the filling gas inside the bulb. Figure 1 As shown, after connecting the bulb 2 to the inflation circuit, a high vacuum is first created using a vacuum pump to remove impurities from the inflation line. Then, according to the design, each valve is opened to inject a certain amount of gas into the bulb, and part of the bulb is immersed in liquid nitrogen. The gas condenses inside the bulb, and the line is under high vacuum. The inflation tube 3 on the bulb is heated with a flame. Under atmospheric pressure, the softened inflation tube contracts inward until it is blocked, completing the inflation. However, for this inflation device, firstly, half or even most of the bulb is still at room temperature, resulting in incomplete gas freezing and affecting the inflation volume; secondly, the low temperature of the bulb is not low enough, and it can only freeze a limited number of gases; in addition, the gas in the hot-melt inflation line is prone to cracking due to the vaporization of liquid nitrogen, leading to a decrease in product yield. Summary of the Invention

[0003] In view of the problems existing in the background technology, this application provides a liquid nitrogen filling device and filling method for high-pressure gas lamps, which can improve the freezing effect on the lamp bulb shell, provide a low temperature environment close to the liquid nitrogen temperature, increase the filling volume and expand the applicable filling types, while reducing the impact on the welding of the filling tube and improving the product yield.

[0004] According to one aspect of the present invention, a liquid nitrogen filling device for a high-pressure gas lamp is provided, comprising a base and a top cover. The base has a first chamber with an upward opening, and the top cover has a second chamber with a downward opening. The first chamber and the second chamber together form a receiving cavity for accommodating a bubble shell. The base and the top cover are provided with corresponding through holes for the neck tubes at both ends of the bubble shell to pass through. The top of the top cover is provided with a liquid nitrogen inlet, and the joint between the base and the top cover is provided with a sealing structure.

[0005] In some embodiments of the present invention, the top of the cover is provided with an exhaust port.

[0006] In some embodiments of the present invention, the sealing structure is formed by the freezing and condensation of a liquid medium at the joint between the base and the top cover.

[0007] In some embodiments of the present invention, the liquid medium is pure water.

[0008] In some embodiments of the present invention, an annular groove is formed at the top of the base, and an annular protrusion adapted to the groove is formed at the bottom of the upper cover.

[0009] In some embodiments of the present invention, the depth of the first chamber is greater than that of the second chamber.

[0010] In some embodiments of the present invention, the edges of the base and the top cover are respectively provided with perforated seat plates.

[0011] In some embodiments of the present invention, a liquid outlet valve is provided on the side wall of the base.

[0012] In some embodiments of the present invention, the base and the top cover are rectangular in shape when fastened together, and the two through holes are respectively provided on the two opposite side walls of the rectangular structure.

[0013] According to another aspect of the present invention, a method for filling a high-pressure gas lamp is provided, wherein the high-pressure gas lamp is filled with liquid nitrogen using the aforementioned high-pressure gas lamp filling device, the filling method comprising the following steps:

[0014] First, place the bulb horizontally in the first chamber of the base, with the two necks of the bulb positioned in their corresponding through holes, and the bulb's inflation tube located on the outside of the base. Then, place the top cover on the base, positioning the bulb's bulb shell within the accommodating cavity formed by the first and second chambers. Next, seal the seam between the base and the top cover using a sealing structure. Then, fill the accommodating cavity with liquid nitrogen through the liquid nitrogen inlet, ensuring the liquid nitrogen completely submerges the bulb shell. Condense the gas to be injected into the bulb within the bulb shell through the inflation tube. Finally, weld the inflation tube together, completing the bulb inflation process.

[0015] This application provides a liquid nitrogen filling device and method for high-pressure gas lamps. The device and method utilize a base and a top cover to hold the bulb's bulb shell. Water droplets condense and seal the seam between the base and top cover, allowing liquid nitrogen to be filled into the base and top cover beyond the seam. This achieves complete encapsulation of the bulb shell by the liquid nitrogen, resulting in a lower temperature close to that of liquid nitrogen. This not only ensures more thorough freezing of the filled gas, guaranteeing the filling volume and meeting the filling pressure requirements of the high-pressure gas lamp, but also allows for the freezing of more gases requiring extremely low temperatures, expanding its application range. Simultaneously, it avoids the impact of liquid nitrogen vapor on the welding of the filling tube located on one side of the base and top cover, improving product yield and effectively ensuring the filling effect and safety. Attached Figure Description

[0016] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0017] Figure 1 This is a schematic diagram of the structure of an existing inflation device in the background technology;

[0018] Figure 2 This is a schematic diagram of the overall structure of the liquid nitrogen filling device for the high-pressure gas lamp in this application;

[0019] Figure 3 This is a schematic diagram of the assembly of the bulb and the high-pressure gas lamp liquid nitrogen filling device of this application;

[0020] Figure 4 This is a schematic diagram showing the assembly process of the bulb and the high-pressure gas lamp liquid nitrogen filling device of this application.

[0021] The labels in the attached diagram represent the following: 1. Liquid nitrogen container; 2. Bulb; 21. Bubble shell; 22. Neck tube; 3. Gas filling tube; 4. Base; 5. Top cover; 6. Through hole; 7. Liquid nitrogen inlet; 8. Sealing structure; 9. Exhaust port; 10. Annular groove; 11. Annular protrusion; 12. Seat plate; 13. Liquid outlet valve. Detailed Implementation

[0022] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0023] In the following description, when referring to the accompanying drawings, the same numbers in different drawings denote the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0024] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, in the description of this application, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0025] The following description, in conjunction with the accompanying drawings, illustrates the liquid nitrogen filling device and filling method for the high-pressure gas lamp provided in this application.

[0026] This application discloses a liquid nitrogen filling device for high-pressure gas lamps. This device is used to fill the bulb of a high-pressure gas lamp with gas, such as... Figure 2 and Figure 3 As shown, the bulb 2 includes a bulb shell 21, neck tubes 22 connected to both ends of the bulb shell 21, and an inflation tube 3 connected to one of the neck tubes 22.

[0027] like Figure 2 and Figure 3 As shown, the high-pressure gas lamp liquid nitrogen filling device includes a base 4 and a top cover 5. The base 4 has a first chamber with an upward opening, and the top cover 5 has a second chamber with a downward opening. The first chamber and the second chamber together form a receiving cavity for accommodating the bubble shell 21. The base 4 and the top cover 5 are respectively provided with through holes 6 for the neck tubes 22 at both ends of the bubble shell 21 to pass through. The top of the top cover 5 is provided with a liquid nitrogen inlet 7, and the joint between the base 4 and the top cover 5 is provided with a sealing structure 8.

[0028] In this invention, when it is necessary to inflate the bulb 2, the top cover 5 can be opened first, and the bulb 2 can be placed horizontally in the first chamber of the base 4, so that the bulb shell 21 of the bulb 2 is located in the first chamber, the two neck tubes 22 of the bulb 2 are respectively placed in the corresponding through holes 6, and the inflation tube 3 of the bulb 2 is located outside the base 4. Then, the top cover 5 is fastened on the base 4, and the bulb shell 21 of the bulb 2 is wrapped by the top cover 5 and the base 4. Then, the joint between the base 4 and the top cover 5 is sealed by the sealing structure 8. Then, liquid nitrogen can be poured into the first chamber and the second chamber from the liquid nitrogen inlet 7, so that the liquid nitrogen immerses the entire bulb shell 21, forming a low temperature environment close to the temperature of liquid nitrogen. Then, the gas to be filled into the bulb 2 is condensed in the bulb shell 21 through the inflation tube 3, and the inflation tube 3 is fused together. Finally, the bulb 2 is inflated.

[0029] This invention ensures that the bulb shell 21 of the bulb 2 is completely submerged in liquid nitrogen, giving the bulb shell 21 a temperature close to that of liquid nitrogen. This not only allows for more thorough freezing of the injected gas, ensuring the gas volume and meeting the filling pressure requirements of the high-pressure gas lamp, but also enables the freezing of more gases requiring extremely low-temperature environments, expanding its application range. At the same time, it avoids the impact of liquid nitrogen vaporization on the welding of the filling tube 3 located on the side of the base 4 and the top cover 5, improving product yield and effectively ensuring the filling effect and safety.

[0030] In some embodiments of the present invention, such as Figure 2 As shown, the top of the cover 5 has an exhaust port 9.

[0031] In this embodiment, by opening an exhaust port 9 on the upper cover 5 that communicates with the second chamber, the gas vaporized by liquid nitrogen can be discharged through the exhaust port 9. When the liquid nitrogen fills the containment chamber to immerse the bubble shell 21, the safety of the device can be effectively guaranteed.

[0032] In some embodiments of the present invention, the liquid nitrogen inlet 7 can be connected to the liquid nitrogen tank through a pipeline, and the opening and closing can be controlled by a valve to add liquid nitrogen into the containment cavity by natural gravity or pumping, so that the gas vaporized by the liquid nitrogen can escape through the exhaust port 9.

[0033] In other embodiments of the present invention, a container can also be used to pour liquid nitrogen from the liquid nitrogen inlet 7 into the receiving cavity.

[0034] In some embodiments of the present invention, such as Figure 2 As shown, the sealing structure 8 is formed by the freezing and condensation of liquid medium at the joint between the base 4 and the top cover 5.

[0035] In this embodiment, after the upper cover 5 and the base 4 are joined, a certain amount of liquid nitrogen can be added to the first chamber of the base 4 through the liquid nitrogen inlet 7 to cool the base 4 and the upper cover 5. Then, the liquid medium is dripped onto the joint between the base 4 and the upper cover 5 (including the gap between the neck tube 22 and the wall of the through hole 6). The liquid medium gradually condenses in the gap until it is sealed, thereby sealing the joint between the base 4 and the upper cover 5. After that, more liquid nitrogen can be added to the first chamber and the second chamber to completely immerse the entire bubble shell 21.

[0036] In some embodiments of the present invention, the liquid medium is a volatile and freezeable liquid medium at room temperature. For example, the volatile and freezeable liquid medium at room temperature can be pure water or other liquids that are volatile at room temperature.

[0037] Preferably, the liquid medium is pure water.

[0038] In some embodiments of the present invention, such as Figure 3As shown, the top of the base 4 forms an annular groove 10, and the bottom of the top cover 5 forms an annular protrusion 11 that matches the groove.

[0039] In this embodiment, the base 4 and the top cover 5 are connected by an insertion method, which not only facilitates the alignment of the top cover 5 and the base 4, improving splicing efficiency and stability, but also increases the length of the seam between the base 4 and the top cover 5 from the inside out. Thus, except for the gap between the neck tube 22 and the wall of the through hole 6, only a small amount of liquid medium is needed to freeze-seal the remaining outer seams between the base 4 and the top cover 5, which can reduce the sealing difficulty and improve the sealing effect. At the same time, it can reduce the possibility of liquid medium entering the first chamber and improve safety.

[0040] In some embodiments of the present invention, the annular groove 10 may be provided on the side wall of the first chamber, that is, the annular groove 10 is connected to the upper surface of the base 4 and the side wall of the first chamber.

[0041] In other embodiments of the present invention, the annular groove 10 may also be provided only on the upper surface of the base 4 and formed by excavating downward to a certain depth.

[0042] In some embodiments of the present invention, the depth of the first chamber is greater than that of the second chamber.

[0043] In this embodiment, by increasing the depth of the first chamber, not only can more liquid nitrogen be contained to provide a stable low-temperature environment, but when forming the sealing structure 8, sufficient liquid nitrogen can be added to the first chamber to reduce the temperature of the base 4 and the top cover 5, and the operational risks caused by adding too much liquid nitrogen or even the liquid level reaching the seam position can also be reduced.

[0044] In some embodiments of the present invention, the depth of the first chamber and the depth of the second chamber can be reasonably designed according to the specifications of the bulb 2. For example, after the bulb 2 is installed in the accommodating cavity, if the depth of the first chamber is greater than that of the second chamber, the top wall of the second chamber can be designed to extend more than 1 cm beyond the top of the bubble shell 21, such as 1 cm, 2 cm, 3 cm, 4 cm, 5 cm, 6 cm, 7 cm, etc., so that the liquid nitrogen can completely submerge the bubble shell 21 after being added to the second chamber. Furthermore, during the process of filling the bubble shell 21 with gas and welding the gas filling tube 3, after a certain amount of liquid nitrogen is vaporized, the liquid nitrogen can still submerge the bubble shell 21.

[0045] In some embodiments of the present invention, such as Figure 2 As shown, the edges of the base 4 and the top cover 5 are respectively provided with perforated seat plates 12.

[0046] In this embodiment, the base 4 can be fixed to the ground or work surface using bolts in conjunction with the base plate 12 to prevent the base 4 from tipping over; the top cover 5 can be fixed to an automatic lifting structure using bolts, such as a screw lifting mechanism, an electric push rod lifting mechanism, or a rack and pinion lifting mechanism, so as to achieve the assembly and separation of the top cover 5 and the base 4 through an automated drive structure, thereby reducing the risk of frostbite caused by manually moving the top cover 5.

[0047] In some embodiments of the present invention, such as Figure 2 As shown, a liquid outlet valve 13 is provided on the side wall of the base 4.

[0048] In this embodiment, after the bulb 2 is fully inflated, some or all of the liquid nitrogen in the accommodating cavity can be discharged from the liquid outlet valve 13, at least so that the liquid nitrogen level is lower than the seam between the base 4 and the top cover 5. Then, the sealing structure 8, which is frozen and condensed by the liquid medium, can be melted by heating or natural heat absorption. After that, the top cover 5 can be removed from the base 4, and finally the inflated bulb 2 can be taken out. Then, the same process is followed to inflate the next bulb 2 to be inflated.

[0049] In some embodiments of the present invention, the melting of the sealing structure 8 can be carried out by blowing hot air from outside; or an electric heating wire can be built into the side wall of the base 4 and / or the side wall of the top cover 5 to accelerate the melting of the sealing structure 8 by electric heating.

[0050] In some embodiments of the present invention, such as Figure 2 As shown, the base 4 and the top cover 5 are rectangular in shape when they are fastened together, and two through holes 6 are respectively located on the two opposite side walls of the rectangular structure.

[0051] In this embodiment, by setting a regular base 4 and a top cover 5, a planar through hole 6 can be formed on their opposite sidewalls, which makes it convenient to set a sealing structure 8 at the through hole 6, reduces the difficulty of setting the sealing structure 8, and improves its use effect.

[0052] This embodiment also proposes a method for filling a high-pressure gas lamp. This method utilizes the aforementioned high-pressure gas lamp liquid nitrogen filling device to fill the high-pressure gas lamp. The filling method includes the following steps:

[0053] First, place the bulb 2 horizontally in the first chamber of the base 4, so that the two neck tubes 22 of the bulb 2 are respectively placed in the corresponding through holes 6, and the air inlet tube 3 of the bulb 2 is located on the outside of the base 4.

[0054] Then, the top cover 5 is placed on the base 4, so that the bulb shell 21 of the bulb 2 is located in the receiving cavity formed by the first chamber and the second chamber, as shown. Figure 4 As shown in Figure A.

[0055] Then, the joint between the base 4 and the top cover 5 is sealed using the sealing structure 8: First, a small amount of liquid nitrogen is added to the first chamber to cool the base 4 and the top cover 5. Then, water droplets are placed on the gap between the base 4 and the top cover 5. The water droplets gradually condense in the gap until the gap is sealed. Figure 4 As shown in B.

[0056] Then, liquid nitrogen is poured into the accommodating cavity through the liquid nitrogen inlet 7, so that the liquid nitrogen completely submerges the bubble shell 21, as shown. Figure 4 As shown in Figure C, the gas to be injected into the bulb 2 is condensed in the bulb shell 21 through the gas filling tube 3.

[0057] Finally, the inflation tube 3 is fused together, and the bulb 2 is filled with gas.

[0058] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A liquid nitrogen filling device for a high-pressure gas lamp, characterized in that, The device includes a base and a top cover. The base has a first chamber with an upward opening, and the top cover has a second chamber with a downward opening. The first chamber and the second chamber together form a receiving cavity for accommodating the bubble shell. The base and the top cover have corresponding through holes for the neck tubes at both ends of the bubble shell to pass through. The top cover has a liquid nitrogen inlet. The joint between the base and the top cover has a sealing structure. The bubble shell has an inflation tube connected to one of the neck tubes at both ends, and the inflation tube is located on the outside of the base; the sealing structure is formed by the freezing and condensation of liquid medium at the joint between the base and the top cover; an annular groove is formed on the top of the base, and an annular protrusion adapted to the groove is formed on the bottom of the top cover; the accommodating cavity is configured such that when liquid nitrogen is filled from the liquid nitrogen inlet, the liquid nitrogen completely submerges the bubble shell.

2. The high-pressure gas lamp liquid nitrogen filling device according to claim 1, characterized in that, The top of the cover is equipped with an exhaust port.

3. The high-pressure gas lamp liquid nitrogen filling device according to claim 1, characterized in that, The liquid medium is pure water.

4. The high-pressure gas lamp liquid nitrogen filling device according to claim 1, characterized in that, The depth of the first chamber is greater than that of the second chamber.

5. The high-pressure gas lamp liquid nitrogen filling device according to claim 1, characterized in that, The edges of the base and the top cover are respectively provided with perforated seat plates.

6. The high-pressure gas lamp liquid nitrogen filling device according to claim 1, characterized in that, The base is equipped with a liquid outlet valve on its side wall.

7. The high-pressure gas lamp liquid nitrogen filling device according to claim 1, characterized in that, The base and the top cover are snapped together to form a rectangular shape, and the two through holes are respectively located on the two opposite side walls of the rectangular structure.

8. A method for filling a high-pressure gas lamp, comprising filling the high-pressure gas lamp with liquid nitrogen as described in any one of claims 1 to 7, characterized in that, The inflation method includes the following steps: First, place the bulb horizontally in the first chamber of the base, with the two necks of the bulb positioned in their respective through holes, and the bulb's inflation tube located on the outside of the base. Then the top cover is placed on the base, so that the bulb shell is located in the receiving cavity formed by the first chamber and the second chamber; Then, a sealing structure is used to seal the joint between the base and the top cover; Then, liquid nitrogen is poured into the containment chamber through the liquid nitrogen inlet, so that the liquid nitrogen submerges the entire bubble shell. The gas to be injected into the bulb is then condensed inside the bubble shell through the gas filling tube. Finally, the inflation tube was welded together, and the bulb was filled with gas.

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