Cooling structure for burning torch in smelting furnace

Abstract

The invention discloses a cooling structure for an ignition gun in a smelting furnace. The cooling structure comprises the smelting furnace. A furnace door which is driven by an air cylinder to be vertically opened and closed is arranged on the smelting furnace, a burner is arranged in the smelting furnace, a mechanism cavity is formed in the smelting furnace, one end of the burner extends into the mechanism cavity to be connected with a gas pipe and a combustion-supporting pipe, and ignition guns are arranged at the connecting positions of the burner, the gas pipe and the combustion-supporting pipe. A mechanism cavity is formed in the air cylinder, an air blowing head facing the burning torch is arranged in the mechanism cavity, the air cylinder is connected with a compressed air pipe, the compressed air pipe is connected with an air supply pipe through a three-way structure, the air supply pipe is connected with the air blowing head, and a control valve is arranged at the position of the three-way structure. And the power is high, the cooling effect is good, the dust generation amount is small, the energy consumption is reduced, and the cost generated by frequently replacing the protection fan is saved.

Description

Technical Field

[0001] The invention relates to the technical field of melting furnaces, and in particular to a cooling structure for an ignition gun in a melting furnace. Background Art

[0002] An aluminum melting furnace is a mechanical device used to melt aluminum products. The aluminum melting furnace usually includes an aluminum melting furnace body and a furnace door arranged on the aluminum melting furnace body. A crucible is arranged in the aluminum melting furnace body. A burner is arranged to heat the crucible with fire so that the aluminum products placed in the crucible are melted.

[0003] The nozzle needs to be ignited by an ignition gun, but the temperature in the furnace is usually very high, and the furnace is a device that works continuously for a long time. The high temperature transferred to the ignition gun will affect the normal use of the ignition gun. Therefore, in the prior art, a fan is usually installed to cool the ignition gun.

[0004] However, the cooling fan used during furnace installation has limited power and produces a lot of dust. When the fan is running, the air inlet draws dust into the pipeline, which can easily cause the pipeline cooling the ignition gun to be blocked. The fan has a small cooling air volume, which can easily cause the ignition gun to burn and the flame detection element to be damaged due to excessive temperature. Summary of the invention

[0005] In order to solve the above-mentioned deficiencies in the prior art, the present invention provides a cooling structure for an ignition gun in a smelting furnace.

[0006] In order to achieve the above technical effects, the present invention adopts the following scheme:

[0007] A cooling structure for an ignition gun in a smelting furnace comprises a furnace; the furnace is provided with a furnace door which is opened and closed vertically by being driven by a cylinder, the furnace is provided with a burner, the furnace is provided with a mechanism cavity, one end of the burner extends into the mechanism cavity and is connected to a gas pipe and a combustion-supporting pipe, an ignition gun is provided at the connection between the burner and the gas pipe and the combustion-supporting pipe, the mechanism cavity is provided with an air blowing head facing the ignition gun, the cylinder is connected to a compressed air pipe, the compressed air pipe is connected to an air supply pipe via a three-way structure, the air supply pipe is connected to the air blowing head, and a control valve is provided at the three-way structure.

[0008] A preferred technical solution, the ignition gun includes a gun head, a ceramic tube, an ignition needle and a mounting bracket, the mounting bracket includes a mounting plate, a connecting ring is fixedly provided at one end of the mounting plate, a socket matching the ring is provided on the tube wall at the connection between the burner and the gas pipe and the combustion-supporting tube, the mounting plate is mounted on the tube wall by bolts, the connecting ring is matched and inserted into the socket, a mounting plate is provided at the other end of the mounting plate through a bracket, the gun head and the ceramic tube are mounted on the mounting plate, the ceramic tube passes through the bracket, the mounting plate and the connecting ring and extends into the connection between the burner and the gas pipe and the combustion-supporting tube, the ignition needle is arranged in the ceramic tube, one end of the ignition needle is connected to the gun head, and one end of the ignition needle extends into the ceramic tube.

[0009] According to a preferred technical solution, the cross section of the blowing head is in a flared shape extending toward the ignition gun.

[0010] According to a preferred technical solution, the mechanism cavity is connected to a plurality of heat dissipation holes extending to the outer wall of the smelting furnace.

[0011] According to a preferred technical solution, a heat insulating layer is provided on the inner wall of the mechanism cavity.

[0012] According to a preferred technical solution, the heat insulating layer comprises a first polyurethane layer, an expanded perlite layer and a second polyurethane layer bonded together, and the expanded perlite layer is sandwiched between the first polyurethane layer and the second polyurethane layer.

[0013] According to a preferred technical solution, the first polyurethane layer and the second polyurethane layer are prepared by foaming the following components: 20% to 30% polyether polyol, 20% to 30% polyester polyol, 5% to 8% cyclopentane, and 40% to 50% isocyanate.

[0014] According to a preferred technical solution, the expanded perlite layer comprises the following components: 30% to 40% perlite particles, 20% to 30% ceramic particles, 10% to 20% sodium silicate, 8% to 10% water glass, and 10% to 20% water.

[0015] Compared with the prior art, the beneficial effects are:

[0016] Through the present invention, a tee and a control valve are added to the original compressed air pipe of the control cylinder to connect an air supply pipe, and the pipeline is redesigned. The end of the air supply pipe is directed toward the ignition gun through the blowing head, and the compressed air is used to cool the ignition gun. The power is large, the cooling effect is good, the dust generation is small, and energy consumption is saved, and the cost of frequent replacement of the protective fan is saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a cross-sectional schematic diagram of the present invention;

[0018] Figure 2 yes Figure 1 The enlarged structural diagram of part A in the middle;

[0019] Figure 3 Schematic diagram of the layer structure of the heat insulation layer in the present invention.

[0020] Figure numerals: 1. furnace; 2. combustion chamber; 3. furnace door; 4. cylinder; 5. compressed air pipe; 6. burner; 7. mechanism chamber; 8. gas pipe; 9. combustion-supporting pipe; 10. ignition gun; 11. blow head; 12. air supply pipe; 13. three-way structure; 14. control valve; 15. insulation layer; 16. heat dissipation hole; 17. mounting plate; 18. connecting ring; 19. ceramic tube; 20. ignition needle; 21. mounting plate; 22. gun head; 23. first polyurethane layer; 24. expanded perlite layer; 25. second polyurethane layer. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely 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, rather than all the embodiments.

[0022] A cooling structure for an ignition gun in a smelting furnace, comprising a furnace 1; a furnace door 3 driven by a cylinder 4 to be opened and closed vertically is provided on the furnace 1; a combustion chamber 2 is provided in the furnace 1, and a crucible is placed in the combustion chamber 2; a burner 6 is provided in the furnace 1; a mechanism chamber 7 is provided on the furnace 1; one end of the burner 6 extends into the mechanism chamber 7 and is connected to a gas pipe 8 and a combustion-supporting pipe 9; the gas pipe 8 is used to transport gas inwardly; the combustion-supporting pipe 9 is used to transport air for combustion; an ignition gun 10 is provided at the connection between the burner 6 and the gas pipe 8 and the combustion-supporting pipe 9, and ignition is performed by the ignition gun 10;

[0023] A blow head 11 facing the ignition gun 10 is provided in the mechanism cavity 7, and the cylinder 4 is connected to a compressed air pipe 5. The operation of the cylinder 4 requires the drive of compressed air, and the compressed air pipe 5 is a pipeline for conveying compressed air to the cylinder 4. The compressed air pipe 5 is connected to an air supply pipe 12 through a three-way structure 13, and the air supply pipe 12 is connected to the blow head 11. A control valve 14 is provided at the three-way structure 13.

[0024] A tee and a control valve 14 are added to the compressed air pipe 5 of the original control cylinder 4 to connect an air supply pipe 12, and the pipeline is redesigned. The end of the air supply pipe 12 is directed toward the ignition gun 10 through the blowing head 11, and the compressed air is used to cool the ignition gun 10. It has high power, good cooling effect, small dust generation, energy saving, and saves the cost of frequent replacement of protective fans.

[0025] A preferred technical solution is that the ignition gun 10 includes a gun head 22, a ceramic tube 19, an ignition needle 20 and a mounting bracket, the mounting bracket includes a mounting plate 17, one end of the mounting plate 17 is fixedly provided with a connecting ring 18, a socket matching the ring is opened on the tube wall at the connection between the burner 6 and the gas pipe 8 and the combustion-supporting tube 9, the mounting plate 17 is mounted on the tube wall by bolts, the connecting ring 18 is matched and inserted into the socket, the other end of the mounting plate 17 is provided with a mounting plate 21 through a bracket, the gun head 22 and the ceramic tube 19 are installed on the mounting plate 21, the ceramic tube 19 passes through the bracket, the mounting plate 17 and the connecting ring 18 and extends into the connection between the burner 6 and the gas pipe 8 and the combustion-supporting tube 9, the ignition needle 20 is arranged in the ceramic tube 19, one end of the ignition needle 20 is connected to the gun head 22, and one end of the ignition needle 20 extends into the ceramic tube 19.

[0026] According to a preferred technical solution, the cross section of the blowing head 11 is in a flared shape extending toward the ignition gun 10 .

[0027] The expanded configuration can increase the blowing range of the blowing head 11 and cool the ignition gun 10 more comprehensively.

[0028] According to a preferred technical solution, the mechanism cavity 7 is connected to a plurality of heat dissipation holes 16 extending to the outer wall of the smelting furnace.

[0029] The heat in the mechanism cavity 7 is dissipated through the heat dissipation holes 16 .

[0030] According to a preferred technical solution, a heat insulating layer 15 is provided on the inner wall of the mechanism cavity 7 .

[0031] The heat insulation layer 15 reduces the heat transfer from the combustion chamber 2 to the mechanism chamber 7 and reduces the high temperature transfer to the ignition gun 10 .

[0032] According to a preferred technical solution, the heat insulating layer 15 includes a first polyurethane layer 23 , an expanded perlite layer 24 and a second polyurethane layer 25 bonded together, and the expanded perlite layer 24 is sandwiched between the first polyurethane layer 23 and the second polyurethane layer 25 .

[0033] The three insulation layers 15 of the first polyurethane layer 23, the expanded perlite layer 24 and the second polyurethane layer 25 are compounded together. The expanded perlite layer 24 can effectively enhance the overall strength and provide a good insulation effect. Compared with a single polyurethane layer, the overall performance is effectively enhanced.

[0034] According to a preferred technical solution, the first polyurethane layer 23 and the second polyurethane layer 25 are prepared by foaming the following components: 20% to 30% polyether polyol, 20% to 30% polyester polyol, 5% to 8% cyclopentane, and 40% to 50% isocyanate.

[0035] According to a preferred technical solution, the expanded perlite layer 24 comprises the following components: 30% to 40% perlite particles, 20% to 30% ceramic particles, 10% to 20% sodium silicate, 8% to 10% water glass, and 10% to 20% water.

[0036] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and 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 should not be understood as a limitation on the present invention.

[0037] 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.

[0038] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

Claims

1. A cooling structure for an ignition gun in a smelting furnace, characterized in that: The invention comprises a furnace (1); the furnace (1) is provided with a furnace door (3) which is driven by a cylinder (4) to open and close vertically; a burner (6) is provided in the furnace (1); a mechanism cavity (7) is provided in the furnace (1); one end of the burner (6) extends into the mechanism cavity (7) and is connected to a gas pipe (8) and a combustion-supporting pipe (9); an ignition gun (10) is provided at the connection between the burner (6) and the gas pipe (8) and the combustion-supporting pipe (9); a blow head (11) facing the ignition gun (10) is provided in the mechanism cavity (7); the cylinder (4) is connected to a compressed air pipe (5); an air supply pipe (12) is connected to the compressed air pipe (5) via a three-way structure (13); the air supply pipe (12) is connected to the blow head (11); a control valve (14) is provided at the three-way structure (13).

2. The cooling structure for an ignition gun in a smelting furnace according to claim 1, characterized in that: The ignition gun (10) comprises a gun head (22), a ceramic tube (19), an ignition needle (20) and a mounting frame, wherein the mounting frame comprises a mounting plate (17), one end of which is fixedly provided with a connecting ring (18), a socket matching the ring is provided on the pipe wall at the connection between the burner (6) and the gas pipe (8) and the combustion-supporting pipe (9), the mounting plate (17) is mounted on the pipe wall by bolts, the connecting ring (18) is matched and inserted into the socket, and the mounting plate (17) The other end of the ignition nozzle (20) is provided with a mounting plate (21) through a bracket, a gun head (22) and a ceramic tube (19) are mounted on the mounting plate (21), the ceramic tube (19) passes through the bracket, the mounting plate (17) and the connecting ring (18) and extends into the connection between the burner (6) and the gas pipe (8) and the combustion-supporting pipe (9), the ignition needle (20) is arranged in the ceramic tube (19), one end of the ignition needle (20) is connected to the gun head (22), and one end of the ignition needle (20) extends into the ceramic tube (19).

3. The cooling structure for an ignition gun in a smelting furnace according to claim 1, characterized in that: The cross section of the blowing head (11) is in a flared shape extending towards the ignition gun (10).

4. The cooling structure for an ignition gun in a smelting furnace according to claim 1, characterized in that: The mechanism cavity (7) is connected to a plurality of heat dissipation holes (16) extending to the outer wall of the smelting furnace.

5. The cooling structure for an ignition gun in a smelting furnace according to claim 1, characterized in that: A heat insulation layer (15) is provided on the inner wall of the mechanism cavity (7).

6. The cooling structure for an ignition gun in a smelting furnace according to claim 5, characterized in that: The heat insulating layer (15) comprises a first polyurethane layer (23), an expanded perlite layer (24) and a second polyurethane layer (25) bonded together, wherein the expanded perlite layer (24) is sandwiched between the first polyurethane layer (23) and the second polyurethane layer (25).

7. The cooling structure for an ignition gun in a smelting furnace according to claim 6, characterized in that: The first polyurethane layer (23) and the second polyurethane layer (25) are prepared by foaming the following components: 20% to 30% of polyether polyol, 20% to 30% of polyester polyol, 5% to 8% of cyclopentane, and 40% to 50% of isocyanate.

8. The cooling structure for an ignition gun in a smelting furnace according to claim 6, characterized in that: The expanded pearlite layer (24) comprises the following components: 30% to 40% pearlite particles, 20% to 30% ceramic particles, 10% to 20% sodium silicate, 8% to 10% water glass, and 10% to 20% water.

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