Large-flow alkali metal atom steam production device

Abstract

The invention provides a high-flow alkali metal atom steam generating device. The high-flow alkali metal atom steam generating device comprises a heating furnace and a plurality of quartz glass tubes, a pressure loading chamber is arranged in the heating furnace; the quartz glass tube is positioned in the heating furnace, and the open end of the quartz glass tube faces upwards and is fixedly welded and communicated with the pressure loading chamber; alkali metal is arranged in the quartz glass tube, and the heating furnace is used for melting the alkali metal into a liquid state; a plurality of tiny holes communicated to the interior of the quartz glass tube are formed in the tube wall of the quartz glass tube in an array mode, and when the pressure of the interior of the quartz glass tube is consistent with the pressure of the exterior of the quartz glass tube, the liquid alkali metal cannot flow out through the tiny holes; the heating furnace is provided with a carrier gas inlet and a carrier gas outlet; and the pressure loading chamber and the quartz glass tube are positioned between the carrier gas inlet and the carrier gas outlet. According to the technical scheme, the problems that in the existing steam generation technology, alkali metal is prone to splashing, and the flow is unstable are solved.

Description

Technical Field

[0001] The invention relates to the field of gas laser technology, and in particular to a large-flow alkali metal atomic vapor production device. Background Art

[0002] Alkali metal vapor lasers have the advantages of both gas and solid lasers and have been a research hotspot in the field of high-power laser technology in recent years. The laser gain medium of alkali metal vapor lasers is alkali metal vapor. How to generate alkali metal vapor more efficiently and stably is one of the key technologies that need to be solved. Usually, the method of generating alkali metal vapor is to use a certain flow of carrier gas, such as helium or methane, to blow the surface of liquid alkali metal heated to a certain temperature, mix it with the vapor generated by the evaporation of the alkali metal, and then take it out of the evaporation device together to achieve the purpose of generating alkali metal vapor. The biggest problem with this technology is that in order to obtain sufficient carrier gas flow and alkali metal vapor flow, it is necessary to increase the amount of alkali metal and the flow of carrier gas. Alkali metal is very easy to splash under the action of carrier gas, resulting in frequent changes in the distribution state of alkali metal in the alkali metal vapor generator, and the generated alkali metal vapor flow is unstable and cannot be accurately controlled. Summary of the invention

[0003] According to the above technical problem of unstable flow rate in the existing steam generation technology, a large-flow alkali metal atomic vapor production device is provided.

[0004] The technical means adopted by the present invention are as follows:

[0005] A large-flow alkali metal atomic vapor production device comprises a heating furnace and a plurality of quartz glass tubes;

[0006] A pressure loading chamber is provided inside the heating furnace, and a pressure regulating valve is provided in the pressure loading chamber;

[0007] The quartz glass tube is located inside the heating furnace, and the open end is welded and fixed to the pressure loading chamber and connected with it upward; there is alkali metal inside the quartz glass tube, and the heating furnace is used to melt the alkali metal into liquid; a plurality of micro holes connected to the inside of the quartz glass tube are arranged in an array on the tube wall of the quartz glass tube, and when the pressure inside the quartz glass tube is consistent with that outside, the liquid alkali metal cannot flow out through the micro holes;

[0008] The heating furnace is provided with a carrier gas inlet and a carrier gas outlet; the pressure loading chamber and the quartz glass tube are located between the carrier gas inlet and the carrier gas outlet.

[0009] Furthermore, the pressure regulating valve is used to adjust the gas pressure inside the pressure loading chamber and thereby adjust the pressure applied to the liquid alkali metal in the quartz glass tube.

[0010] Furthermore, the diameter of the micro-hole is 0.1 mm.

[0011] Furthermore, the pressure regulating valve is connected to a device for providing high-pressure and high-purity helium, and adjusts the gas pressure inside the pressure loading chamber by controlling the high-pressure and high-purity helium gas introduced into the pressure loading chamber, thereby adjusting the pressure applied to the liquid alkali metal in the quartz glass tube.

[0012] Furthermore, the carrier gas introduced into the heating furnace is methane or helium with a purity greater than 5N.

[0013] Furthermore, when the pressure applied to the liquid alkali metal in the quartz glass tube is higher than the pressure inside the heating furnace, the liquid alkali metal can flow out from the fine holes and coat the outer surface of the quartz glass tube. The heating of the heating furnace can cause the alkali metal on the outer surface of the quartz glass tube to evaporate and mix with the carrier gas introduced into the heating furnace to generate alkali metal atomic vapor.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] The present invention provides a large-flow alkali metal atomic vapor production device, which uses a micropore structure to coat a thin layer of liquid alkali metal on the outer wall of a quartz glass tube, and evaporates it under high-temperature conditions. A plurality of quartz glass tubes are arrayed, and a high-purity carrier gas is used to blow and flow through the quartz glass tube array, thereby achieving a large-flow and high-concentration alkali metal atomic vapor output; since the alkali metal thin layer is in close contact with the surface of the glass tube, no splashing occurs even under a large-flow carrier gas condition, thereby improving the stability of the alkali metal vapor flow rate, and also obtaining a large evaporation specific surface area, thereby improving the generation efficiency of the alkali metal vapor.

[0016] Based on the above reasons, the present invention can be widely promoted in the field of gas lasers. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 1 This is a schematic diagram of the structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the structure of the quartz glass tube of the present invention.

[0020] Figure 3 This is a schematic diagram of the internal structure of the quartz glass tube of the present invention.

[0021] In the figure: 1. quartz glass tube; 11. alkali metal; 12. micro hole; 2. heating furnace; 3. pressure loading chamber; 4. pressure regulating valve. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Example 1

[0024] like Figure 1-3 As shown, the present invention provides a large-flow alkali metal atomic vapor production device, including a heating furnace 2 and a plurality of quartz glass tubes 1;

[0025] A pressure loading chamber 3 is provided inside the heating furnace 2, and a pressure regulating valve 4 is provided in the pressure loading chamber 3;

[0026] The quartz glass tube 1 has an open end and a closed end; the quartz glass tube 1 is located inside the heating furnace 2, and the open end is welded and fixed upward to the pressure loading chamber 3 and communicated with the pressure loading chamber 3;

[0027] The quartz glass tube 1 contains an alkali metal 11, and the heating furnace 2 is used to heat and melt the alkali metal into a liquid state;

[0028] The wall of the quartz glass tube 1 is provided with a plurality of microscopic holes 12 connected to the inside of the quartz glass tube 1 in an array. When the pressure inside the quartz glass tube 1 is consistent with the pressure outside, the liquid alkali metal 11 cannot flow out through the microscopic holes 12 due to the viscosity of the liquid alkali metal 11 and the capillary effect of the microscopic holes 12.

[0029] The pressure regulating valve 4 is used to adjust the gas pressure inside the pressure loading chamber 3 and thus adjust the pressure applied to the liquid alkali metal in the quartz glass tube 1;

[0030] The heating furnace 2 is provided with a carrier gas inlet and a carrier gas outlet; the pressure loading chamber 3 and the quartz glass tube 1 are located between the carrier gas inlet and the carrier gas outlet.

[0031] Furthermore, a plurality of the quartz glass tubes 1 are arranged in an array.

[0032] Furthermore, it comprises 100 of the quartz glass tubes 1 .

[0033] Furthermore, the diameter of the micro hole 12 is 0.1 mm.

[0034] Furthermore, the pressure regulating valve 4 is connected to a device for providing high-pressure and high-purity helium, and adjusts the gas pressure inside the pressure loading chamber 3 by controlling the high-pressure and high-purity helium gas introduced into the pressure loading chamber 3, thereby adjusting the pressure applied to the liquid alkali metal 11 in the quartz glass tube 1.

[0035] Furthermore, the carrier gas introduced into the heating furnace 2 is methane or helium with a purity greater than 5N.

[0036] Furthermore, when the pressure applied to the liquid alkali metal 11 in the quartz glass tube 1 is higher than the pressure inside the heating furnace 2, the liquid alkali metal 11 can flow out from the fine holes 12 and coat the outer surface of the quartz glass tube 1. The heating of the heating furnace 2 can evaporate the alkali metal 11 on the outer surface of the quartz glass tube 1 and mix with the carrier gas introduced into the heating furnace 2 to generate alkali metal atomic vapor.

[0037] When the large-flow alkali metal atomic vapor generating device provided by the present invention is in operation, the pressure applied to the liquid alkali metal 11 in the quartz glass tube 1 is higher than the pressure in the heating furnace 2 through the pressure regulating valve 4. Under the action of the external pressure difference, the liquid alkali metal 11 in the quartz glass tube 1 flows out from the fine holes 12 on the tube wall of the quartz glass tube 1 and is coated on the outer surface of the tube wall of the entire quartz glass tube 1. The alkali metal evaporates under high temperature conditions, and then mixes with the carrier gas flowing in from the carrier gas inlet of the heating furnace 2, and finally flows out from the carrier gas outlet of the heating furnace 2 together, thereby realizing the generation of alkali metal atomic vapor.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-flow alkali metal atomic vapor generating device, characterized in that: It includes a heating furnace and a number of quartz glass tubes; A pressure loading chamber is provided inside the heating furnace, and a pressure regulating valve is provided in the pressure loading chamber; The quartz glass tube is located inside the heating furnace, and the open end is welded and fixed to the pressure loading chamber and connected with it upward; there is alkali metal inside the quartz glass tube, and the heating furnace is used to melt the alkali metal into liquid; a plurality of micro holes connected to the inside of the quartz glass tube are arranged in an array on the tube wall of the quartz glass tube, and when the pressure inside the quartz glass tube is consistent with that outside, the liquid alkali metal cannot flow out through the micro holes; The heating furnace is provided with a carrier gas inlet and a carrier gas outlet; the pressure loading chamber and the quartz glass tube are located between the carrier gas inlet and the carrier gas outlet.

2. The high-flow alkali metal atomic vapor generating device according to claim 1, characterized in that: The pressure regulating valve is used to adjust the gas pressure inside the pressure loading chamber and thus adjust the pressure applied to the liquid alkali metal in the quartz glass tube.

3. The high-flow alkali metal atomic vapor generating device according to claim 1, characterized in that: The diameter of the micro-hole is 0.1 mm.

4. The high-flow alkali metal atomic vapor generating device according to claim 1, characterized in that: The pressure regulating valve is connected to a device for providing high-pressure and high-purity helium gas, and adjusts the gas pressure inside the pressure loading chamber by controlling the high-pressure and high-purity helium gas introduced into the pressure loading chamber, thereby adjusting the pressure applied to the liquid alkali metal in the quartz glass tube.

5. The high-flow alkali metal atomic vapor generating device according to claim 1, characterized in that: The carrier gas introduced into the heating furnace is methane or helium with a purity greater than 5N.

6. The high-flow alkali metal atomic vapor generating device according to claim 1, characterized in that: When the pressure applied to the liquid alkali metal in the quartz glass tube is higher than the pressure inside the heating furnace, the liquid alkali metal can flow out from the fine holes and coat the outer surface of the quartz glass tube. The alkali metal on the outer surface of the quartz glass tube can be evaporated by heating of the heating furnace and mixed with the carrier gas introduced into the heating furnace to generate alkali metal atomic vapor.

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