Gas phase liquid preheating device

Abstract

The utility model provides a gas-phase liquid preheating device. The gas-phase liquid preheating device comprises a preheating tank and a heating rod, the preheating tank comprises a shell and a middle cylinder; an annular cavity is formed between the shell and the middle cylinder; a liquid inlet pipe and a liquid outlet pipe which extend out of the shell are respectively arranged at the top and the bottom of the middle cylinder; the heating rod extends to the annular cavity from the top of the shell; and heat conduction oil is arranged in the annular cavity. The annular cavity is formed between the shell and the middle cylinder, the heat conduction oil is used as a heat medium for filling the annular cavity, and the heat conduction oil is heated by the heating rod, so that the heat of the heating rod can be quickly absorbed by the heat conduction oil and uniformly dispersed to the whole annular cavity, the heat loss is reduced, and meanwhile, the problem that gas-phase liquid is vaporized in advance due to concentrated partial heating is avoided; and uniform and rapid heating of the gas-phase liquid in the preheating process is ensured, the heating efficiency of the gas-phase liquid and the safety of the preheating device are ensured, and the consistency of the temperature of the gas-phase liquid is also ensured, so that the stable proceeding of the subsequent evaporation welding procedure is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of vapor phase welding technology, and more specifically to a vapor phase liquid preheating device. Background Technology

[0002] Vapor phase welding is a technique that uses high-temperature gas generated by the evaporation of vapor phase liquid to heat and weld workpieces. The core step of the welding process is to preheat the vapor phase liquid, transfer the preheated vapor phase liquid to the heating chamber, and heat the vapor phase liquid to an evaporating state so that the heat can be transferred to the workpiece by the steam conduction.

[0003] Existing vapor-liquid preheating devices place the vapor-liquid in a heating container and heat it using electric heating elements until it reaches a preset temperature. However, direct heating easily leads to uneven heating of the vapor-liquid, with some areas experiencing excessively high temperatures or failing to reach the preset temperature. Excessively high local temperatures can cause premature evaporation of the vapor-liquid, resulting in wasted resources and making it difficult to maintain stable gas pressure in the heating container. Furthermore, vapor-liquid with inconsistent temperatures entering the heating chamber can make it difficult for the vapor-liquid to reach its evaporation temperature, significantly affecting the heating effect on the workpiece and the welding quality. Utility Model Content

[0004] The purpose of this invention is to overcome the defects of the prior art and provide a gas-liquid preheating device to solve the technical problem of uneven heating in existing gas-liquid preheating devices.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A gas-liquid preheating device, comprising:

[0007] A preheating tank, comprising an outer shell and a middle cylinder; an annular cavity is formed between the outer shell and the middle cylinder; the top and bottom of the middle cylinder are respectively provided with an inlet pipe and an outlet pipe extending to the outer shell;

[0008] A heating rod extends from the top of the outer shell to the annular cavity; the annular cavity is filled with heat-conducting oil.

[0009] The outer shell has a shape that corresponds to the shape of the middle cylinder; both the middle cylinder and the outer shell are cylindrical.

[0010] The gas-liquid preheating device also includes a vacuum pump; a vacuum tube is provided at the top of the middle cylinder, and the vacuum tube is connected to the vacuum pump.

[0011] The number of heating rods is at least two, and the at least two heating rods are evenly distributed along the annular cavity.

[0012] The number of heating rods is four; the four heating rods are distributed in a circle within the annular cavity.

[0013] The outer shell has a mounting cylinder at its top corresponding to the heating rod; the heating rod passes through the mounting cylinder and extends from the end of the mounting cylinder away from the outer shell into the annular cavity.

[0014] The heating rod includes a fixing plate and several heat-conducting wires; the heat-conducting wires are bent and disposed on one side of the fixing plate, and the two ends of the heat-conducting wires extend to the other side of the fixing plate; the fixing plate is connected to the top of the mounting cylinder.

[0015] The outlet pipe is equipped with a first pressure regulating valve and a solenoid valve; the first pressure regulating valve is used to adjust the pressure inside the middle cylinder, and the solenoid valve is used to control the opening and closing of the outlet pipe and the flow rate.

[0016] The gas-liquid preheating device further includes: an oil inlet pipe, an oil tank, and a pressure pump; the oil tank is used to store heat transfer oil, the oil inlet pipe connects the oil tank and the annular cavity, and the pressure pump is used to drive the heat transfer oil in the oil tank into the annular cavity.

[0017] The gas-liquid preheating device further includes an oil outlet pipe; the oil outlet pipe extends from the bottom of the annular cavity into the oil tank, and a second pressure regulating valve is provided on the oil outlet pipe.

[0018] The advantages of this invention compared to the prior art are as follows: This invention forms an annular cavity between the outer shell and the middle cylinder, and uses heat-conducting oil as the heat medium filling the annular cavity. The heat-conducting oil is heated by a heating rod, so that the heat from the heating rod can be quickly absorbed by the heat-conducting oil and evenly distributed throughout the annular cavity, reducing heat loss, significantly improving heat transfer efficiency, and avoiding local heat accumulation that could damage the preheating tank. At the same time, it avoids premature vaporization of the gas phase liquid due to partial heat concentration. Therefore, the annular cavity design ensures uniform and rapid heating of the gas phase liquid during the preheating process, ensuring the heating efficiency of the gas phase liquid and the safety of the preheating device. It also ensures the consistency of the gas phase liquid temperature, facilitating the stable operation of subsequent evaporation welding processes.

[0019] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model, it can be implemented according to the contents of the specification. In order to make the above and other objects, features and advantages of this utility model more obvious and understandable, the following are preferred embodiments, which are described in detail below. Attached Figure Description

[0020] Figure 1 A schematic diagram of the overall structure of a gas-liquid preheating device provided by this utility model;

[0021] Figure 2 A schematic diagram of the structure of a preheating tank for a gas-liquid preheating device provided by this utility model;

[0022] Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure at point CC.

[0023] Figure label:

[0024] 21. Preheating tank; 211. Outer shell; 212. Middle cylinder; 213. Annular cavity; 214. Liquid inlet pipe; 215. Liquid outlet pipe; 216. Vacuum tube; 217. Mounting cylinder; 22. Heating rod; 221. Fixing plate; 222. Heat conducting wire; 23. First pressure regulating valve; 24. Solenoid valve; 25. Oil inlet pipe; 26. Oil tank; 27. Pressure pump; 28. Oil outlet pipe; 29. ​​Second pressure regulating valve. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] It should be understood that, when used in this specification and the appended claims, the terms “comprising” and “including” indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0027] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0028] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0029] See Figure 1-3 As shown, this embodiment discloses a gas-liquid preheating device, which includes:

[0030] The preheating tank 21 includes an outer shell 211 and a middle cylinder 212; an annular cavity 213 is formed between the outer shell 211 and the middle cylinder 212; the top and bottom of the middle cylinder 212 are respectively provided with an inlet pipe 214 and an outlet pipe 215 extending to the outer shell 211.

[0031] Heating rod 22 extends from the top of outer shell 211 to annular cavity 213; heat-conducting oil is provided in annular cavity 213.

[0032] By forming an annular cavity 213 between the outer shell 211 and the middle cylinder 212, and using heat transfer oil as the heat medium filling the annular cavity 213, the heat transfer oil is heated by the heating rod 22. This allows the heat from the heating rod 22 to be quickly absorbed by the heat transfer oil and evenly distributed throughout the annular cavity 213, reducing heat loss, significantly improving heat transfer efficiency, and preventing localized heat accumulation that could damage the preheating tank 21. It also prevents the gas phase liquid from prematurely vaporizing due to concentrated partial heating. Therefore, the annular cavity 213 ensures uniform and rapid heating of the gas phase liquid during the preheating process, guaranteeing the heating efficiency of the gas phase liquid, thereby ensuring the safety of the gas phase liquid preheating device, and also ensuring the consistency of the gas phase liquid temperature, which facilitates the stable operation of subsequent evaporation welding processes.

[0033] Specifically, the outer shell 211 corresponds to the outer shape of the middle cylinder 212; both the middle cylinder 212 and the outer shell 211 are cylindrical. The cylindrical design improves the structural compactness and stability of the preheating tank 21, thereby enhancing its durability. Furthermore, the smooth cylindrical surface prevents the formation of localized high or low temperatures, facilitating uniform heat transfer and dissipation. In other embodiments, the middle cylinder 212 and the outer shell 211 may be elliptical, conical, or other shapes.

[0034] Specifically, a vacuum tube 216 is provided at the top of the middle cylinder 212, which is used to connect a vacuum pump. In practice, before heating the gas phase liquid, a vacuum pump is used to evacuate the inside of the middle cylinder 212 to ensure that the gas phase liquid is free of air. This avoids the interference of air on the workpiece during the welding process, which could cause bubbles to form on the workpiece. Therefore, the setting of the vacuum tube 216 ensures the vacuum environment of the middle cylinder 212, thereby ensuring the welding quality of the workpiece.

[0035] Specifically, the vapor-liquid preheating device also includes a vacuum pump (not shown), connected to vacuum tube 216, used to evacuate the preheating tank 21. By evacuating the preheating tank 21, the possibility of the vapor-liquid coming into contact with air during the preheating process is effectively reduced, preventing residual air from entering the vacuum-sealed heating chamber after preheating. This avoids the air affecting the workpiece during the welding process and causing bubbles. The vacuum pump and vacuum tube 216 ensure the welding quality of the workpiece, reduce the defect rate, and thus reduce production and processing costs.

[0036] Specifically, there are at least two heating rods 22, which are evenly distributed along the annular cavity 213. This even distribution of the heating rods 22 allows the heat-conducting oil within the annular cavity 213 to absorb heat radiation from multiple directions, achieving balanced heating of the oil at multiple points, improving heating efficiency, and facilitating rapid temperature control response. When the temperature within the annular cavity 213 needs adjustment, changing the conduction current of each heating rod 22 allows for rapid temperature changes within the annular cavity 213, contributing to precise temperature control and maintaining a constant temperature within the annular cavity 213, thus achieving the preheating function.

[0037] In this embodiment, there are four heating rods 22; the four heating rods 22 are circumferentially distributed within the annular cavity 213. The four heating rods 22 are evenly spaced, which can heat the heat-conducting oil in the vicinity and avoid mutual interference due to an excessive number of heating rods 22. In other embodiments, the number of heating rods 22 can be adjusted according to actual needs.

[0038] Specifically, the top of the outer shell 211 is provided with an installation cylinder 217 corresponding to the heating rod 22. The heating rod 22 passes through the installation cylinder 217 and extends from the end of the installation cylinder 217 away from the outer shell 211 into the annular cavity 213. The installation cylinder 217 can guide the heating rod 22 to extend into the annular cavity 213, while avoiding the heating rod 22 from contacting the outer shell 211 and the middle cylinder 212, thus preventing the outer shell 211 and the middle cylinder 212 from being directly heated and burned through, ensuring the durability and safety of the preheating tank 21.

[0039] Specifically, the heating rod 22 includes a fixing plate 221 and several heat-conducting wires 222; the heat-conducting wires 222 are bent and arranged on one side of the fixing plate 221, and both ends of the heat-conducting wires 222 extend to the other side of the fixing plate 221; the fixing plate 221 is sealed and connected to the top of the mounting cylinder 217. The bent arrangement of the heat-conducting wires 222 effectively increases the heat exchange area between the heat-conducting wires 222 and the heat transfer oil, improving the heat transfer efficiency. The two ends of the heat-conducting wires 222 extend to the side of the fixing plate 221 away from the annular cavity 213, facilitating current connection, and the fixing plate 221 isolates the annular cavity 213 from the external environment, preventing heat transfer oil overflow and avoiding the influence of the external environment on the heating process of the heat transfer oil, thus ensuring the service life of the preheating tank 21.

[0040] Specifically, the outlet pipe 215 is equipped with a first pressure regulating valve 23 and a solenoid valve 24. The first pressure regulating valve 23 is used to regulate the pressure inside the middle cylinder 212, and the solenoid valve 24 is used to control the opening and closing of the outlet pipe 215 and the flow rate. The first pressure regulating valve 23 enables precise control of the pressure in the middle cylinder 212, avoiding excessive pressure in the middle cylinder 212 or excessive pressure difference between the middle cylinder 212 and the annular cavity 213 due to heating of the gas phase liquid, thus improving the safety and reliability of the preheating tank 21. The solenoid valve 24 facilitates flexible adjustment of the outflow rate and flow rate of the gas phase liquid, making it easy to control the heating of the gas phase liquid in the heating chamber 30.

[0041] Specifically, a temperature detector (not shown) is installed in the middle cylinder 212 and the annular cavity 213. The temperature detector can detect and provide feedback on the temperature changes in the annular cavity 213 in real time, which facilitates timely adjustment of the current of the heating rod 22. This ensures that the temperature of the gas phase liquid in the middle cylinder 212 can be maintained at the preset temperature during the preheating process, avoiding premature vaporization of the gas phase liquid due to excessively high temperature or insufficient preheating effect due to low temperature, which would affect the welding quality of the workpiece.

[0042] Specifically, the preheating device 20 includes an oil inlet pipe 25, an oil tank 26, and a pressure pump 27. The oil tank 26 is used to store heat transfer oil, the oil inlet pipe 25 connects the oil tank and the annular cavity 213, and the pressure pump 27 is used to drive the heat transfer oil in the oil tank 26 into the annular cavity 213. The oil tank 26 provides sufficient heat transfer oil to the annular cavity 213. The rapid movement of the heat transfer oil driven by the pressure pump 27 accelerates the temperature regulation and control within the annular cavity 213 to a certain extent, thereby improving the preheating efficiency of the gas-liquid phase.

[0043] Specifically, the preheating device 20 includes an oil outlet pipe 28, which extends from the bottom of the annular cavity 213 into the oil tank 26; a second pressure regulating valve 29 is provided on the oil outlet pipe 28. The second pressure regulating valve 29 is used to regulate the pressure in the annular cavity 213 to prevent the heat transfer oil from being overheated and causing the pressure in the annular cavity 213 to be too high, thus ensuring the safety and reliability of the preheating tank 21.

[0044] This embodiment of a vapor-liquid preheating device forms an annular cavity between the outer shell and the middle cylinder, using heat-conducting oil as the heat medium filling the annular cavity. A heating rod heats the heat-conducting oil, allowing the heat from the heating rod to be rapidly absorbed by the heat-conducting oil and evenly distributed throughout the annular cavity. This reduces heat loss, significantly improves heat transfer efficiency, and prevents localized heat accumulation that could damage the preheating tank. It also prevents premature vaporization of the vapor-liquid due to concentrated heating. Therefore, the annular cavity design ensures uniform and rapid heating of the vapor-liquid during preheating, guaranteeing heating efficiency and the safety of the preheating device. Furthermore, it ensures consistent vapor-liquid temperature, facilitating stable operation of subsequent evaporation welding processes.

[0045] The above examples are merely illustrative of the technical content of this utility model to facilitate reader understanding, but do not imply that the implementation of this utility model is limited to these embodiments. Any technical extensions or re-creations made based on this utility model are protected by this utility model. The scope of protection of this utility model is defined by the claims.

Claims

1. A gas-liquid preheating device, characterized in that, include: A preheating tank, comprising an outer shell and a middle cylinder; an annular cavity is formed between the outer shell and the middle cylinder; The top and bottom of the middle cylinder are respectively provided with an inlet pipe and an outlet pipe extending to the outer shell; A heating rod extends from the top of the outer shell to the annular cavity; the annular cavity is filled with heat-conducting oil; A vacuum pump is provided, and a vacuum tube is provided at the top of the middle cylinder, which is connected to the vacuum pump.

2. The gas-liquid preheating device according to claim 1, characterized in that, The outer shell is shaped to correspond to the outer shape of the middle cylinder; both the middle cylinder and the outer shell are cylindrical.

3. The gas-liquid preheating device according to claim 1, characterized in that, The number of heating rods is at least two, and the at least two heating rods are evenly distributed along the annular cavity.

4. The gas-liquid preheating device according to claim 3, characterized in that, The number of heating rods is four; the four heating rods are arranged in a circle within the annular cavity.

5. The gas-liquid preheating device according to claim 1, characterized in that, The top of the outer shell is provided with a mounting cylinder corresponding to the heating rod; the heating rod passes through the mounting cylinder and extends from the end of the mounting cylinder away from the outer shell into the annular cavity.

6. The gas-liquid preheating device according to claim 5, characterized in that, The heating rod includes: a fixing plate and several heat-conducting wires; the heat-conducting wires are bent and disposed on one side of the fixing plate, and the two ends of the heat-conducting wires extend to the other side of the fixing plate; the fixing plate is connected to the top of the mounting cylinder.

7. The gas-liquid preheating device according to claim 1, characterized in that, The outlet pipe is equipped with a first pressure regulating valve and a solenoid valve; the first pressure regulating valve is used to adjust the pressure inside the middle cylinder, and the solenoid valve is used to control the opening and closing of the outlet pipe and the flow rate.

8. The gas-liquid preheating device according to claim 1, characterized in that, Also includes: Oil inlet pipe, oil tank and pressure pump; The oil drum is used to store heat transfer oil, the oil inlet pipe connects the oil drum and the annular cavity, and the pressure pump is used to drive the heat transfer oil in the oil drum into the annular cavity.

9. The gas-liquid preheating device according to claim 8, characterized in that, Also includes: Oil outlet pipe; The oil outlet pipe extends from the bottom of the annular cavity into the oil tank, and a second pressure regulating valve is provided on the oil outlet pipe.

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