Heat transfer and direct blowing prevention device for hearth air pipeline of industrial furnace cooling system

Abstract

The utility model discloses a heat transfer and direct blowing prevention device for a hearth air pipeline of an industrial furnace cooling system, relates to the technical field of industrial furnaces, and aims to solve the problems that in the prior art, heat generated at high temperature is transferred to the outside of a hearth along a pipeline, the furnace wall and the pipeline outside the furnace body are overheated, and energy is wasted. A cold air pipeline is arranged between the furnace wall and the ceramic fiber heat insulation layer, a ceramic pipe is arranged at the end of the cold air pipeline, bosses are arranged in the ceramic pipe, and a sliding ceramic heat insulation head is connected into the ceramic pipe in a sliding mode and comprises a body, a high-temperature-resistant spring is arranged between the two bosses, and an air blocking head is arranged at the end of the sliding ceramic heat insulation head. The sliding ceramic heat insulation head is slidably connected in the ceramic pipe, heat is prevented from directly entering the ceramic pipe and making contact with a cold air pipeline so that the heat can be transmitted outwards, the gas flowing direction can be changed by arranging the bending area, and cold air is prevented from directly blowing a workpiece. And the quality problem of the workpiece is caused.

Description

Technical Field

[0001] This utility model relates to the field of industrial kiln technology, specifically to a device for preventing heat transfer and direct blowing in the furnace air duct of an industrial furnace cooling system. Background Technology

[0002] Some heat treatment processes require the workpiece to be cooled in a controlled manner inside the furnace after heating and holding. To achieve this controlled cooling, a cold air blowing pipeline is designed inside the furnace. Since the workpiece operates at very high temperatures inside the furnace during heating, typically reaching 500-1100 degrees Celsius for a long time, the heat generated by the air blowing pipeline under prolonged high temperatures is transferred to the outside of the furnace along the steel pipeline, causing overheating of the furnace wall and external pipelines. This not only wastes energy but also increases safety risks. Furthermore, direct blowing of cold air onto the workpiece can cause a quenching effect, and the resulting thermal and structural stresses, if exceeding the workpiece's yield strength, can lead to deformation or cracking. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a device for preventing heat transfer and direct blowing in the furnace air duct of an industrial furnace cooling system, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, this utility model discloses a heat transfer and direct-blow prevention device for the furnace air duct of an industrial furnace cooling system. The technical solution includes a furnace body, which includes a furnace wall. The inner wall of the furnace wall is provided with a ceramic fiber insulation layer, and the other side of the ceramic fiber insulation layer is the interior of the furnace chamber. A cold air duct is provided between the furnace wall and the ceramic fiber insulation layer. A ceramic tube is located at one end of the cold air duct, and the ceramic tube is confined to the cold air duct. The other end of the ceramic tube extends into the interior of the furnace chamber. A boss is provided inside the ceramic tube, and a sliding ceramic heat insulation head is slidably connected to the ceramic tube through the boss. The sliding ceramic heat insulation head includes a main body, which is mutually restrained by the boss and the ceramic tube. A high-temperature resistant spring is located between the two bosses. An air baffle is provided at the end of the sliding ceramic heat insulation head, and an air outlet is opened on the sliding ceramic heat insulation head at the air baffle. The ceramic fiber insulation layer is a folded ceramic fiber module.

[0005] As a preferred embodiment of this utility model, the end of the cold air duct is provided with a fifth protrusion, the left end of the ceramic tube is provided with a fourth protrusion, the ceramic tube is sleeved on the cold air duct, and the fifth protrusion and the fourth protrusion limit each other to prevent the ceramic tube from detaching from the cold air duct due to excessive cold air pressure.

[0006] As a preferred embodiment of this utility model, a first protrusion is provided inside the right side of the ceramic tube, and a second protrusion is provided inside the ceramic tube to the left of the first protrusion, so that the sliding ceramic heat insulation head can slide inside the ceramic tube through the first protrusion and the second protrusion.

[0007] As a preferred embodiment of this utility model, heat-insulating fibers are provided between the first boss and the second boss to block the transmission of high temperature to the left side of the ceramic tube and protect the high-temperature resistant heat-insulating spring from the effects of high temperature.

[0008] As a preferred embodiment of this utility model, the left end of the sliding ceramic heat insulation head is provided with a third protrusion, and a high-temperature resistant spring is provided between the third protrusion and the second protrusion. The high-temperature resistant spring can be an Inconel 718 spring, a GH4169 spring, or a 310S stainless steel spring. The high-temperature resistant spring causes the sliding ceramic heat insulation head to move to the left. When cold air is supplied through the cold air duct, the cold air pressure will press against the sliding ceramic heat insulation head and compress the high-temperature resistant spring to move to the right.

[0009] As a preferred technical solution of this utility model, the edge of the air baffle is provided with a bending area, which is in contact with the outer right side of the ceramic tube. The bending area can initially insulate heat and guide cold air to prevent it from blowing directly onto the workpiece.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: By setting the ceramic tube between the furnace and the cold air duct, the low thermal conductivity of ceramic reduces the heat from spreading outward through the cold air duct. By sliding the ceramic heat insulation head inside the ceramic tube, heat is prevented from directly entering the ceramic tube and contacting the cold air duct, thus preventing heat from being transferred outward. By setting the bending area, the gas flow direction can be changed to prevent cold air from blowing directly on the workpiece and causing it to crack. Attached Figure Description

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

[0012] Figure 2 This is a schematic diagram of the default state of this utility model;

[0013] Figure 3 This is a schematic diagram of the ventilation state of this utility model.

[0014] In the diagram: 1. Furnace body; 101. Furnace wall; 2. Ceramic fiber insulation layer; 3. Cold air duct; 301. Fifth boss; 4. Ceramic tube; 401. First boss; 402. Second boss; 5. Sliding ceramic insulation head; 501. Main body; 502. Third boss; 503. Air baffle; 5031. Bending area; 504. Air outlet; 505. Fourth boss; 6. High-temperature resistant spring; 7. Insulation fiber; 8. Furnace interior. Detailed Implementation

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example 1

[0016] like Figures 1 to 3 As shown, this utility model discloses a heat transfer and direct-blow prevention device for the furnace air duct of an industrial furnace cooling system. The technical solution includes a furnace body 1, which includes a furnace wall 101. The inner wall of the furnace wall 101 is provided with a ceramic fiber insulation layer 2. The other side of the ceramic fiber insulation layer 2 is the furnace interior 8. A cold air duct 3 is welded onto the furnace wall 101. One end of the cold air duct 3 is connected to a cold air supply device, and the other end extends into the interior of the ceramic fiber insulation layer 2. A fifth protrusion 301 is provided at the end of the cold air duct 3. A ceramic tube 4 is sleeved on the cold air duct 3, and the right end of the ceramic tube 4 extends into the furnace interior 8. Figure 1 As shown, the ceramic tube 4 has a fourth protrusion 505 inside its left end. The fifth protrusion 301 and the fourth protrusion 505 mutually limit each other, preventing the ceramic tube 4 from detaching from the cold air duct 3. The ceramic tube 4 has a first protrusion 401 inside its right end. A second protrusion 402 is located on the inner wall of the ceramic tube 4 to the left of the first protrusion 401. A sliding ceramic heat insulation head 5 is slidably connected inside the ceramic tube 4 through the first protrusion 401 and the second protrusion 402. The sliding ceramic heat insulation head 5 includes a main body 501. The sliding ceramic heat insulation head 5 has a left... The sliding ceramic heat insulation head 5 has a third protrusion 502 at one end, and a high-temperature resistant spring 6 is provided between the third protrusion 502 and the second protrusion 402. A heat-insulating fiber 7 is provided between the second protrusion 402 and the first protrusion 401. The right end of the sliding ceramic heat insulation head 5 extends to the outside of the ceramic tube 4. An air baffle 503 is provided at the right end of the sliding ceramic heat insulation head 5. A bending area 5031 is provided at the edge of the air baffle 503, and the bending area 5031 contacts the outside of the ceramic tube 4. An air outlet 504 is provided on the main body 501 between the air baffle 503 and the ceramic tube 4. Figure 2 As shown.

[0017] The working principle of this utility model is as follows: When rapid cooling of the workpiece is required inside the furnace chamber 8, the cold air supply device is activated to supply cold air into the cold air duct 3. The cold air enters the ceramic tube 4 and the sliding ceramic heat insulation head 5 through the cold air duct 3. As the cold air continuously enters, the internal pressure of the ceramic tube 4 and the sliding ceramic heat insulation head 5 gradually increases, causing the sliding ceramic heat insulation head 5 to move to the right and compress the high-temperature resistant spring 6. At this time, a gap appears between the bending area 5031 and the ceramic tube 4, and the cold air enters the furnace chamber 8 through the air outlet 504 and is guided by the bending area 5031, thereby preventing direct blowing onto the workpiece and thus avoiding quality issues. Figure 3 As shown, when cooling stops, the supply of cold air stops, the internal pressure of ceramic tube 4 and sliding ceramic heat insulation head 5 decreases, and the high-temperature resistant spring 6 drives the sliding ceramic heat insulation head 5 to reset.

[0018] The circuits and mechanical connections involved in this utility model are common practices used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments. They are common knowledge.

[0019] Components not described in detail in this article are existing technologies.

[0020] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A furnace cooling system furnace duct heat transfer and direct blowing prevention device, comprising a furnace body (1), wherein the furnace body (1) includes a furnace wall (101), the inner wall of the furnace wall (101) is provided with a ceramic fiber insulation layer (2), and the other side of the ceramic fiber insulation layer (2) is the furnace interior (8), characterized in that: A cold air duct (3) is provided between the furnace wall (101) and the ceramic fiber insulation layer (2). A ceramic tube (4) is provided at the end of the cold air duct (3). The ceramic tube (4) is restricted to the cold air duct (3). The other end of the ceramic tube (4) extends into the furnace chamber (8). A boss is provided inside the ceramic tube (4). A sliding ceramic heat insulation head (5) is slidably connected inside the ceramic tube (4) through the boss. The sliding ceramic heat insulation head (5) includes a main body (501). The main body (501) is mutually restricted to the ceramic tube (4) through the boss. A high temperature resistant spring (6) is provided between the two bosses. A baffle head (503) is provided at the end of the sliding ceramic heat insulation head (5). An air outlet (504) is opened on the sliding ceramic heat insulation head (5) at the baffle head (503).

2. The heat transfer and direct-blow prevention device for the furnace air duct of an industrial furnace cooling system according to claim 1, characterized in that: The end of the cold air duct (3) is provided with a fifth protrusion (301), and the left end of the ceramic tube (4) is provided with a fourth protrusion (505). The ceramic tube (4) is sleeved on the cold air duct (3), and the fifth protrusion (301) and the fourth protrusion (505) limit each other.

3. The heat transfer and direct-blow prevention device for the furnace air duct of an industrial furnace cooling system according to claim 2, characterized in that: The ceramic tube (4) has a first protrusion (401) inside on the right side, and a second protrusion (402) inside the ceramic tube (4) to the left of the first protrusion (401).

4. The heat transfer and direct-blow prevention device for the furnace air duct of an industrial furnace cooling system according to claim 3, characterized in that: A heat-insulating fiber (7) is provided between the first boss (401) and the second boss (402).

5. The heat transfer and direct-blow prevention device for the furnace air duct of an industrial furnace cooling system according to claim 4, characterized in that: The sliding ceramic heat insulation head (5) has a third protrusion (502) at its left end, and a high-temperature resistant spring (6) is located between the third protrusion (502) and the second protrusion (402).

6. The heat transfer and direct-blow prevention device for the furnace air duct of an industrial furnace cooling system according to claim 1, characterized in that: The air baffle (503) has a bending area (5031) at its edge, and the bending area (5031) is in contact with the outer right side of the ceramic tube (4).

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