Lead-free solder wire gas smelting furnace

Abstract

The utility model discloses a lead-free solder wire gas smelting furnace which comprises a gas smelting furnace body and a furnace cover installed at the position of an opening in the top end of the gas smelting furnace body in a flange bolting mode, a furnace pipe used for containing lead-free solder wire machining raw materials is installed in the gas smelting furnace body, and smoke exhaust pipes are installed on the two sides of the top end of the furnace cover. A gas inlet control valve used for allowing inert gas to enter is installed on the outer wall of one side of the gas smelting furnace body, and a vacuumizing pipe is installed on the outer wall of the other side of the gas smelting furnace body. According to the gas smelting furnace, a cage type gas combustion structure and an accurate gas control system are adopted, uniform calcination of raw materials in the furnace pipe can be achieved, the application of the cage type gas combustion structure in the gas smelting furnace is mainly embodied in that gas and air can be evenly distributed in the furnace body after being mixed, and the combustion effect is good. By means of the structure, combustion heat is not only concentrated at a certain position, but also widely covers lead-free solder wire processing raw materials in the furnace pipe through flowing of combustion gas.

Description

Technical Field

[0001] The utility model relates to the technical field of melting furnaces, in particular to a lead-free solder wire gas melting furnace. Background Art

[0002] A gas melting furnace, a device that uses coal gas as a heat source, is widely used in the processing of lead-free solder wire. Its primary function is to provide a stable, uniform, high-temperature environment for melting the metal, ensuring that the solder wire reaches the required melting temperature during production, thereby ensuring product quality and production efficiency. The structure of a gas melting furnace primarily consists of a furnace body, a furnace chamber, a combustion system, a fume exhaust system, a temperature control system, an operating platform, and a control panel. The furnace body is typically constructed of heat-resistant materials to prevent heat loss. The furnace chamber is the core area where the metal is melted, where the high-temperature gases generated by the combustion of coal gas directly heat the metal. The combustion system mixes the coal gas with air and ignites it, generating a large amount of heat. The fume exhaust system ensures the safe discharge of combustion exhaust gases to avoid environmental pollution. The temperature control system monitors the furnace chamber temperature in real time and precisely adjusts the gas flow and air supply to maintain a stable temperature within the furnace, ensuring that the metal is processed in the optimal melting state. The working principle of a gas furnace relies on the combustion of gas to generate heat, heating the metal material in the furnace until it melts and forms liquid metal, which is convenient for subsequent processing. However, during the use of the current gas furnace, the combustion system mainly generates a high-temperature flame in the lower part of the furnace body to calcine the lead-free solder wire raw materials in the crucible. At this time, the bottom of the crucible is always heated first. Over time, this heat is transferred to the upper area through the material of the crucible. Since the metal raw materials at the bottom are heated first, while the upper part of the crucible is heated more slowly, this temperature gradient causes uneven heating of the metal raw materials in the crucible. In the production of lead-free solder wire, if the metal melting process is uneven, it is easy to cause uneven distribution of impurities in the metal, affecting the quality of the subsequent lead-free solder wire. Utility Model Content

[0003] The purpose of the utility model is to provide a lead-free solder wire gas melting furnace to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a lead-free solder wire gas melting furnace, comprising a gas melting furnace body and a furnace cover bolted to a flange at an opening position at the top of the gas melting furnace body, a furnace core for accommodating lead-free solder wire processing raw materials installed inside the gas melting furnace body, exhaust pipes installed on both sides of the top of the furnace cover, an air intake control valve for allowing inert gas to enter installed on one outer wall of the gas melting furnace body, a vacuum tube installed on the other outer wall of the gas melting furnace body, a switch valve installed on the bottom end of the vacuum tube, a gas intake pipe group installed on the bottom end of the gas melting furnace body, and a cage-type gas combustion structure installed on the top of the gas intake pipe group, and an electronic lighter for igniting gas installed on one inner wall of the gas melting furnace body.

[0005] Preferably, mechanical feet are fixed on the four outer walls of the gas melting furnace body, and the bottom ends of the mechanical feet are fixed with square leg columns extending downwards.

[0006] Preferably, an inner edge is integrally formed at one end of the interior of the gas melting furnace body.

[0007] Preferably, an annular lip is integrally formed at the opening position of the top end of the furnace, and the lower surface of the annular lip is in contact with the upper surface of the inner edge.

[0008] Preferably, the gas inlet pipe group includes a central gas pipe installed at the bottom of the gas melting furnace body and a solenoid valve installed at the bottom end of the central gas pipe.

[0009] Preferably, the cage-type gas combustion structure includes a circular air outlet pipe installed at the top of the central gas pipe, a plurality of vertical pipes installed in a circular array at the top of the circular air outlet pipe, and a surrounding portion integrally formed at the top of the vertical pipe. Several circular holes are provided on the outer walls of the vertical pipe and the surrounding portion, and several air holes are provided at the top of the circular air outlet pipe.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: the lead-free solder wire gas melting furnace adopts a cage-type gas combustion structure and a precise gas control system, which can achieve uniform calcination of the raw materials in the furnace core. The application of the cage-type gas combustion structure in the gas melting furnace is mainly reflected in its ability to mix the gas and air and evenly distribute them in the furnace body. This structure not only concentrates the combustion heat on a certain part, but also widely covers the lead-free solder wire processing raw materials in the furnace core through the flow of combustion gas, ensuring that the heat distribution of the entire furnace is more uniform. Since the distribution of combustion gas is more uniform, the raw materials in the entire crucible can be heated more evenly, thereby avoiding local overheating or uneven heating. For the calcination process of lead-free solder wire, uniform heating can effectively control the metal component in the solder wire, making the melting process smoother and reducing quality problems such as metal oxidation and uneven impurity distribution caused by uneven heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0012] Figure 2 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0013] Figure 3 This is a schematic diagram of the three-dimensional structure of the utility model Figure 1 ;

[0014] Figure 4 This is a schematic diagram of the three-dimensional structure of the utility model Figure 2 ;

[0015] Figure 5 This is a schematic diagram of the three-dimensional cross-sectional structure of the utility model Figure 1 .

[0016] Figure 6 This is a schematic diagram of the three-dimensional cross-sectional structure of the utility model Figure 2 .

[0017] In the figure: 1. Gas furnace body; 101. Inner edge; 2. Furnace cover; 3. Vacuum tube; 301. On / off valve; 4. Smoke exhaust pipe; 5. Gas inlet pipe group; 501. Center gas pipe; 502. Solenoid valve; 6. Electronic igniter; 7. Furnace core; 701. Annular lip; 8. Cage-type gas combustion structure; 801. Vertical pipe; 802. Surrounding part; 9. Circular outlet pipe; 901. Air hole; 10. Inlet control valve. DETAILED DESCRIPTION

[0018] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-6 The utility model provides an embodiment of a lead-free solder wire gas melting furnace, comprising a gas melting furnace body 1 and a furnace cover 2 bolted to a flange at an opening on the top of the gas melting furnace body 1. The gas melting furnace body 1 is provided with legs fixed to the outer walls thereof, and a downwardly extending square leg column is fixed to the bottom end of the legs.

[0020] The gas furnace body 1 houses a furnace core 7 for accommodating lead-free solder wire processing raw materials. Smoke exhaust pipes 4 are installed on both sides of the top of the furnace cover 2. An air intake control valve 10 for admitting inert gas is installed on one outer wall of the gas furnace body 1. Operators operate the air intake control valve 10 to allow only a portion of the inert gas to enter, preventing an excessive amount of inert gas from causing a lack of combustion environment.

[0021] A vacuum tube 3 is mounted on the other outer wall of the gas furnace body 1. An on-off valve 301 is mounted at the bottom of the vacuum tube 3. A gas inlet pipe assembly 5 is mounted at the bottom of the gas furnace body 1, and a cage-type gas combustion structure 8 is mounted at the top of the gas inlet pipe assembly 5. An electronic lighter 6 for igniting the gas is mounted on one inner wall of the gas furnace body 1.

[0022] An inner edge 101 is integrally formed at one end of the gas furnace body 1. An annular lip 701 is integrally formed at the opening of the top of the furnace 7. The lower surface of the annular lip 701 contacts the upper surface of the inner edge 101. Once the flange bolting of the gas furnace body 1 and the furnace cover 2 is released, the furnace 7 can be lifted out of the gas furnace body 1. At this point, the annular lip 701 and the inner edge 101 no longer overlap.

[0023] The annular lip 701 and the inner edge 101 stabilize the furnace 7 and keep it in a suspended state, so as to ensure that the flame generated by the cage-type gas combustion structure 8 contacts the furnace 7 evenly.

[0024] The gas inlet pipe group 5 includes a central gas pipe 501 installed at the bottom of the gas furnace body 1 and a solenoid valve 502 installed at the bottom end of the central gas pipe 501;

[0025] The cage-type gas combustion structure 8 includes a circular gas outlet pipe 9 installed at the top of the central gas pipe 501, a plurality of risers 801 installed in a circular array at the top of the circular gas outlet pipe 9, and a surrounding portion 802 integrally formed at the top of the risers 801. The top of the circular gas outlet pipe 9 is provided with a plurality of air holes 901. The solenoid valve 502 is connected to the external gas supply end. When the solenoid valve 502 is in the normally open state, the gas enters the circular gas outlet pipe 9 through the solenoid valve 502 and the central gas pipe 501. When the electronic igniter 6 is working, the gas discharged from the air holes 901 is ignited to calcine and heat the bottom wall of the furnace 7.

[0026] Several circular holes are provided on the outer walls of the vertical pipe 801 and the surrounding part 802. Part of the gas in the circular gas outlet pipe 9 enters the vertical pipe 801 through the gas hole 901 and enters the surrounding part 802. The circular holes on the surface of the vertical pipe 801 and the surrounding part 802 also form flame spray points under the ignition of the electronic igniter 6. The flame spray points are used to heat the outer wall surface of the furnace 7 to improve the heating uniformity of the furnace 7.

[0027] When the embodiment of the present application is in use, the staff first places the lead-free solder wire raw materials evenly in the furnace core 7, and uses the furnace cover 2 to make the gas furnace body 1 in a closed state, and connects the air intake control valve 10 to the external oxygen and inert gas supply end, connects the gas intake pipe group 5 to the external natural gas supply end, and the smoke exhaust pipe 4 is connected to the smoke treatment equipment through the control valve. The smoke exhaust pipe 4 and the control valve will promptly guide the exhaust gas generated in the furnace to the external emission system to prevent harmful substances from accumulating in the furnace, and the vacuum tube 3 is connected to the vacuum pump through the switch valve 301. The low-pressure and low-oxygen environment in the gas furnace body 1 helps to reduce the generation of impurities in the oxidation reaction and maintain the quality of the lead-free solder wire. The staff starts the gas intake pipe group 5, and the gas is transported to the cage-type gas combustion structure 8 through the pipeline, and the electronic igniter 6 is used to ignite the gas. In this process, the design of the gas intake pipe group 5 needs to ensure that the gas The pressure and flow rate are within the preset range, thereby ensuring the stability and uniformity of the combustion process. The cage-type gas combustion structure 8 mixes the gas with air and ignites it to produce a uniformly distributed high-temperature flame. The flame heats the furnace core 7 through the uniformly distributed heat, causing the lead-free solder wire raw material to gradually melt, and the temperature is evenly distributed to achieve an ideal melting effect. In this process, the heat in the furnace is evenly transferred to the furnace core 7 and the surface of the raw material by the cage-type gas combustion structure 8, avoiding quality problems caused by uneven heating. After melting is completed, a constant temperature is maintained for a short time to calcine to remove excess impurities and oxide layers in the raw material. When the lead-free solder wire raw material in the furnace core 7 reaches the ideal melting state and calcination is completed, the staff gradually reduces the gas supply of the gas inlet pipe group 5, and the air intake control valve 10 begins to close. The temperature in the furnace slowly drops. At this time, the molten material in the furnace core needs to be gradually cooled for subsequent treatment and processing.

Claims

1. A lead-free solder wire gas melting furnace, characterized by: The invention comprises a gas melting furnace body (1) and a furnace cover (2) bolted to a flange at an opening position of the top of the gas melting furnace body (1); a furnace core (7) for accommodating lead-free solder wire processing raw materials is installed inside the gas melting furnace body (1); smoke exhaust pipes (4) are installed on both sides of the top of the furnace cover (2); an air intake control valve (10) for allowing inert gas to enter is installed on one side outer wall of the gas melting furnace body (1); a vacuum tube (3) is installed on the other side outer wall of the gas melting furnace body (1); a switch valve (301) is installed at the bottom end of the vacuum tube (3); a gas intake pipe group (5) is installed at the bottom end of the gas melting furnace body (1), and a cage-type gas combustion structure (8) is installed at the top end of the gas intake pipe group (5); and an electronic lighter (6) for igniting gas is installed on one side inner wall of the gas melting furnace body (1).

2. A lead-free solder wire gas melting furnace according to claim 1, characterized in that: The outer walls of the gas melting furnace body (1) are all fixed with mechanical feet, and the bottom ends of the mechanical feet are fixed with square leg columns extending downwards.

3. A lead-free solder wire gas melting furnace according to claim 1, characterized in that: An inner edge (101) is integrally formed at one end of the interior of the gas melting furnace body (1).

4. A lead-free solder wire gas melting furnace according to claim 3, characterized in that: An annular lip (701) is integrally formed at the opening position of the top end of the furnace (7), and the lower surface of the annular lip (701) is in contact with the upper surface of the inner edge (101).

5. The lead-free solder wire gas melting furnace according to claim 1, characterized in that: The gas inlet pipe group (5) comprises a central gas pipe (501) installed at the bottom of the gas melting furnace body (1) and a solenoid valve (502) installed at the bottom end of the central gas pipe (501).

6. A lead-free solder wire gas melting furnace according to claim 5, characterized in that: The cage-type gas combustion structure (8) comprises a circular gas outlet pipe (9) installed at the top of a central gas pipe (501), a plurality of vertical pipes (801) installed in a circular array at the top of the circular gas outlet pipe (9), and a surrounding portion (802) integrally formed at the top of the vertical pipe (801); a plurality of circular holes are provided on the outer walls of the vertical pipe (801) and the surrounding portion (802); and a plurality of gas holes (901) are provided at the top of the circular gas outlet pipe (9).

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