Continuous heat treatment resistance furnace

Abstract

This utility model discloses a continuous heat treatment resistance furnace, comprising: a continuous furnace body; and a first inner support frame. The beneficial effects of this utility model are: by setting a first resistance heating element and a third resistance heating element, the first resistance heating element within the first and second inner support frames performs resistance heating on the workpiece; the third resistance heating element heats the workpiece entering the second inner support frame, thus improving the continuous heating efficiency of the processed workpiece. By setting a second high-temperature fan, a connecting ventilation box, and a connecting box, the second high-temperature fan draws hot air from the connecting box at the top of the first inner support frame through the connecting ventilation box, improving the heating efficiency within the second inner support frame. Preheating is achieved through multiple first resistance heating elements within the first inner support frame; the hot air from the second inner support frame then re-enters the first inner support frame through the first ventilation hole, circulating the heat.

Description

Technical Field

[0001] This utility model relates to the field of resistance furnace technology, specifically a continuous heat treatment resistance furnace. Background Technology

[0002] Resistance furnaces contain resistance elements (such as nickel-chromium alloys, iron-chromium-aluminum alloys, silicon carbide rods, etc.). When current passes through, the resistance elements generate heat due to their own resistance, and the temperature rises. The high-temperature resistance elements radiate heat to surrounding objects in the form of electromagnetic waves (the main method). Heat is transferred through the flow of air or protective gas inside the furnace, and heat is transferred through the furnace wall or direct contact with the workpiece. Heat treatment is a core process in the fields of mechanical manufacturing and material processing. Its core objective is to improve the microstructure and mechanical properties of metal materials through heating, holding, and cooling operations. However, traditional heat treatment resistance furnaces mostly adopt single-zone or independent zone heating modes. The workpiece needs to be started and stopped multiple times or moved in sections inside the furnace, resulting in serious heat loss, high overall energy consumption, and low processing efficiency for the workpiece. Utility Model Content

[0003] The purpose of this utility model is to provide a continuous heat treatment resistance furnace to solve the problems mentioned in the background art, which are that traditional heat treatment resistance furnaces mostly adopt single-zone or zone independent heating modes, and the workpiece needs to be started and stopped or moved in sections multiple times in the furnace body, resulting in serious heat loss, high overall energy consumption, and low processing efficiency of the workpiece.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a continuous heat treatment resistance furnace, comprising: Continuous furnace body; The first inner support frame is set inside the continuous furnace body. The second inner support frame is set inside the continuous furnace body. One side of the second inner support frame is fixed to the first inner support frame. The third inner support frame is fixed to the side of the second inner support frame away from the first inner support frame. The first resistive heating element is installed at equal intervals inside the first inner support frame and the second inner support frame. Multiple third resistive heating elements are installed at equal intervals on the inner side of the second inner support frame. A hot air collection box is installed inside the first inner support frame. A first air outlet pipe is installed on the top of the hot air collection box. A connecting box is fixedly connected to the top of both the first and second inner support frames. A second high-temperature fan is installed on one of the connecting boxes. The output end of the second high-temperature fan is connected to one of the connecting boxes. A connecting ventilation box is fixedly connected to the input end of the second high-temperature fan. The other connecting box is connected to the connecting ventilation box through a duct. A cooling air inlet box is fixed inside the No. 3 inner support frame, and a cooling air inlet pipe is fixed to the top of the cooling air inlet box.

[0005] As a preferred embodiment of this utility model: a No. 1 side ventilation box is symmetrically arranged on the outer side of the No. 1 inner support frame, and a No. 2 side ventilation box is symmetrically arranged on the outer side of the No. 2 inner support frame. Multiple No. 1 ventilation holes are symmetrically opened inside the No. 1 inner support frame and the No. 2 inner support frame. The No. 1 ventilation holes are connected to the No. 1 side ventilation box and the No. 2 side ventilation box. A No. 1 high-temperature fan is symmetrically installed on the outer side of the No. 1 inner support frame. The input end of the No. 1 high-temperature fan is connected to the No. 2 side ventilation box through a duct, and the output end of the No. 1 high-temperature fan is connected to the No. 1 side ventilation box through a duct.

[0006] As a preferred embodiment of this utility model: multiple No. 2 ventilation holes are symmetrically opened inside the No. 3 inner support frame, and No. 3 side ventilation boxes are symmetrically fixed to the outside of the No. 3 inner support frame. The No. 2 ventilation holes are connected to the No. 3 side ventilation boxes, and No. 2 air outlet pipes are fixed to the outside of the No. 3 side ventilation boxes.

[0007] As a preferred embodiment of this utility model: both sides of the continuous furnace body are symmetrically and slidably provided with closed doors, both sides of the continuous furnace body are symmetrically installed with cylinders, the output end of the cylinders is fixedly connected to the closed doors, and the interior of the continuous furnace body is symmetrically installed with furnace slide rails, and the inner side of the furnace slide rails is provided with support frames.

[0008] As a preferred embodiment of this utility model: multiple internal fixing frames are fixedly connected inside the first inner support frame and the second inner support frame, and multiple second resistive heating elements are installed on the inner side of the internal fixing frame.

[0009] As a preferred embodiment of this utility model: an air inlet box is symmetrically fixed inside the second inner support frame, a centralized air box is installed on the top of the second inner support frame by bolts, the first air inlet box and the centralized air box are connected by a duct, and a hot air inlet pipe is provided on the top of the centralized air box.

[0010] As a preferred embodiment of this utility model: an air suction box is fixedly connected inside the No. 3 inner support frame, and an air outlet pipe No. 3 is provided on the top of the air suction box.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: By setting a No. 1 resistance heating element and a No. 3 resistance heating element, this utility model realizes the resistance heating treatment of the workpiece by the No. 1 resistance heating element in the No. 1 inner support frame and the No. 2 inner support frame, and the heating treatment of the workpiece entering the No. 2 inner support frame by the No. 3 resistance heating element, thereby improving the continuous heating efficiency of the processed workpiece. By setting a No. 2 high-temperature fan, a connecting ventilation box and a connecting box, the No. 2 high-temperature fan can extract hot air from the connecting box at the top of the No. 1 inner support frame through the connecting ventilation box, thereby improving the heating efficiency of the No. 2 inner support frame. Preheating can be achieved by multiple No. 1 resistance heating elements in the No. 1 inner support frame. The hot air in the No. 2 inner support frame then enters the No. 1 inner support frame through the No. 1 ventilation hole in the No. 1 inner support frame, and the heat is circulated. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a rear view of the present invention; Figure 3 This is a schematic diagram of the support frame and the slide rail structure inside the furnace of this utility model; Figure 4 These are bottom views of the No. 1 inner support frame, No. 2 inner support frame, and No. 3 inner support frame of this utility model; Figure 5 This is a schematic diagram of the structure of the second ventilation hole of this utility model; Figure 6 This is a schematic diagram of the external structure of the No. 1 inner support frame, the No. 2 inner support frame, and the No. 3 inner support frame of this utility model.

[0013] In the diagram: 1. Continuous furnace body; 2. Enclosed door; 3. Cylinder; 4. Support frame; 5. Inner slide rail; 6. No. 1 inner support frame; 7. No. 2 inner support frame; 8. No. 3 inner support frame; 9. No. 1 resistance heating element; 10. Inner fixed frame; 11. No. 2 resistance heating element; 12. Hot air collection box; 13. No. 1 air outlet pipe; 14. No. 1 ventilation hole; 15. No. 2 ventilation hole; 16. No. 1 side ventilation box; 17. No. 2 side ventilation box; 18. No. 1 high-temperature fan; 19. No. 3 side ventilation box; 20. No. 2 air outlet pipe; 21. No. 3 resistance heating element; 22. No. 1 air inlet box; 23. Centralized air box; 24. Hot air inlet pipe; 25. Cooling air inlet pipe; 26. No. 3 air outlet pipe; 27. Connecting ventilation box; 28. Connecting box; 29. ​​No. 2 high-temperature fan; 30. Suction box; 31. Cooling air inlet box. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figures 1 to 6 This utility model provides a technical solution: a continuous heat treatment resistance furnace, comprising: a continuous furnace body 1; a first inner support frame 6 fixedly connected to the inside of the continuous furnace body 1, a second inner support frame 7 fixedly connected to the inside of the continuous furnace body 1, one side of the second inner support frame 7 fixedly connected to the first inner support frame 6, and a third inner support frame 8 fixedly connected to the side of the second inner support frame 7 away from the first inner support frame 6; a first resistance heating element 9 equidistantly installed inside the first inner support frame 6 and the second inner support frame 7, and a plurality of third resistance heating elements 21 equidistantly installed on the inner side of the second inner support frame 7; and a hot air collection box 12 fixedly connected to the first inner support frame 6. Inside the support frame 6, the top of the hot air collection box 12 is fixedly connected to the No. 1 air outlet pipe 13. The tops of the No. 1 inner support frame 6 and the No. 2 inner support frame 7 are both fixedly connected to the connecting box 28. A No. 2 high temperature fan 29 is installed on one of the connecting boxes 28. The output end of the No. 2 high temperature fan 29 is connected to one of the connecting boxes 28. The input end of the No. 2 high temperature fan 29 is fixedly connected to the connecting ventilation box 27. The other connecting box 28 is connected to the connecting ventilation box 27 through a duct. The cooling air inlet box 31 is fixedly connected inside the No. 3 inner support frame 8. The top of the cooling air inlet box 31 is fixedly connected to the cooling air inlet pipe 25.

[0016] It should be noted that in this embodiment, the workpiece to be heated by the resistance furnace is placed on the support frame 4. The support frame 4 and the workpiece are moved by the slide rail 5 inside the furnace. Multiple thermocouples are installed on the inner side of the continuous furnace body 1 to monitor the temperature at each position in real time. The output end of the cylinder 3 drives the sealing door 2 to move downward to seal the inlet and outlet. Hot air is injected into the centralized air box 23 through the hot air inlet pipe 24. The hot air then enters the first air inlet box 22 through the centralized air box 23 and blows into the second inner support frame 7, improving the heating efficiency of the workpiece entering the second inner support frame 7. The workpiece is resistively heated by multiple first resistance heating elements 9 in the first inner support frame 6 and the second inner support frame 7. The heating efficiency of the workpiece in the second inner support frame 7 is improved by the third resistance heating element 21. The workpiece is heated by multiple first resistance heating elements 9 in the first inner support frame 6, the second inner support frame 7, and the third inner support frame 7. The workpiece moves within frame 8. The input end of the No. 1 high-temperature fan 18 draws hot air from the No. 2 inner support frame 7 into the No. 1 side ventilation box 16 through the No. 2 side ventilation box 17. The hot air then enters the No. 1 inner support frame 6 through the No. 1 side ventilation box 16. Then, the input end of the No. 2 high-temperature fan 29 draws hot air from the connecting box 28 at the top of the No. 1 inner support frame 6 through the connecting ventilation box 27. The hot air is circulated and heated, which improves the heating efficiency. When the workpiece reaches the No. 3 inner support frame 8, the heat in the No. 3 inner support frame 8 is collected through the No. 2 ventilation hole 15 and the suction box 30. The heat is also collected through the hot air collection box 12 and the No. 1 air outlet pipe 13. After collection, the workpiece reaches the bottom of the cooling air inlet box 31. The cooling air inlet pipe 25 blows air into the cooling air inlet box 31 to dissipate heat and cool the heated workpiece. The workpiece is cooled by cooling air at a suitable temperature. The specific architecture and operating logic of the cylinder 3, the resistance heating element, the high-temperature fan, and the thermocouple in this application, which are coordinated and controlled by an external controller, are consistent with the existing technology in this field, and therefore will not be discussed in detail here.

[0017] In one embodiment, such as Figures 4 to 6 As shown, a No. 1 side ventilation box 16 is symmetrically fixed to the outer side of the No. 1 inner support frame 6, and a No. 2 side ventilation box 17 is symmetrically fixed to the outer side of the No. 2 inner support frame 7. Multiple No. 1 ventilation holes 14 are symmetrically opened inside the No. 1 inner support frame 6 and the No. 2 inner support frame 7. The No. 1 ventilation holes 14 are connected to the No. 1 side ventilation box 16 and the No. 2 side ventilation box 17. A No. 1 high-temperature fan 18 is symmetrically installed on the outer side of the No. 1 inner support frame 6. The input end of the No. 1 high-temperature fan 18 is connected to the No. 2 side ventilation box 17 through a duct, and the output end of the No. 1 high-temperature fan 18 is connected to the No. 1 side ventilation box 16 through a duct.

[0018] It should be noted that in this embodiment, the hot air in the No. 2 inner support frame 7 and the No. 1 inner support frame 6 is recycled by the No. 1 high-temperature fan 18, and the inner workpiece on the inside is subjected to resistance heating by the No. 1 inner support frame 6 and the No. 2 inner support frame 7, which improves the work efficiency.

[0019] In one embodiment, such as Figures 1 to 6 As shown, multiple second ventilation holes 15 are symmetrically opened inside the third inner support frame 8, and a third side ventilation box 19 is symmetrically fixed to the outside of the third inner support frame 8. The second ventilation holes 15 and the third side ventilation box 19 are connected to each other, and a second air outlet pipe 20 is fixed to the outside of the third side ventilation box 19.

[0020] It should be noted that in this embodiment, the hot air entering the inner support frame 8 is collected and processed through the second ventilation hole 15 and the third side ventilation box 19, and the hot air is collected and utilized.

[0021] In one embodiment, such as Figure 1 and Figure 2 As shown, closed doors 2 are symmetrically slidably installed on both sides of the continuous furnace body 1, and cylinders 3 are symmetrically installed on both sides of the continuous furnace body 1. The output end of the cylinders 3 is fixedly connected to the closed doors 2. Furnace slide rails 5 are symmetrically installed inside the continuous furnace body 1, and support frames 4 are provided on the inner side of the furnace slide rails 5.

[0022] It should be noted that in this embodiment, the output end of the cylinder 3 drives the sealing door 2 to slide on one side of the continuous furnace body 1, and the sealing door 2 seals the space inside the continuous furnace body 1.

[0023] In one embodiment, such as Figure 4 and Figure 5 As shown, multiple inner fixing frames 10 are fixed inside both the first inner support frame 6 and the second inner support frame 7, and multiple second resistive heating elements 11 are installed on the inner side of the inner fixing frame 10.

[0024] It should be noted that in this embodiment, the workpiece on the support frame 4 is continuously heated by the second resistance heating element 11 installed inside the inner fixing frame 10.

[0025] In one embodiment, such as Figures 1 to 6 As shown, an air inlet box 22 is symmetrically fixed inside the second inner support frame 7. A centralized air box 23 is installed on the top of the second inner support frame 7 by bolts. The first air inlet box 22 and the centralized air box 23 are connected by air ducts. A hot air inlet pipe 24 is provided on the top of the centralized air box 23.

[0026] It should be noted that in this embodiment, the external hot air equipment blows hot air into the central air box 23 and the first air box 22 through the hot air inlet pipe 24, which further improves the heating efficiency and enhances the temperature inside the second inner support frame 7 and the first inner support frame 6.

[0027] In one embodiment, such as Figures 1 to 6 As shown, an air suction box 30 is fixedly connected inside the inner support frame 8 of No. 3, and an air outlet pipe 26 of No. 3 is provided on the top of the air suction box 30.

[0028] It should be noted that in this embodiment, the hot air entering the inner support frame 8 is extracted and collected through the suction box 30 and the No. 3 air outlet pipe 26.

[0029] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] 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 continuous heat treatment resistance furnace, characterized in that, include: Continuous furnace body (1); The first inner support frame (6) is set inside the continuous furnace body (1). The second inner support frame (7) is set inside the continuous furnace body (1). One side of the second inner support frame (7) is fixed to the first inner support frame (6). The third inner support frame (8) is fixed to the side of the second inner support frame (7) away from the first inner support frame (6). The first resistive heating element (9) is installed at equal intervals inside the first inner support frame (6) and the second inner support frame (7). Multiple third resistive heating elements (21) are installed at equal intervals on the inner side of the second inner support frame (7). A hot air collection box (12) is set inside the first inner support frame (6). A first air outlet pipe (13) is set on the top of the hot air collection box (12). A connecting box (28) is fixedly connected to the top of the first inner support frame (6) and the second inner support frame (7). A second high temperature fan (29) is installed on one of the connecting boxes (28). The output end of the second high temperature fan (29) is connected to one of the connecting boxes (28). A connecting ventilation box (27) is fixedly connected to the input end of the second high temperature fan (29). The other connecting box (28) is connected to the connecting ventilation box (27) through a duct. Cooling air inlet box (31) is fixed inside the No. 3 inner support frame (8), and a cooling air inlet pipe (25) is fixed to the top of the cooling air inlet box (31).

2. The continuous heat treatment resistance furnace according to claim 1, characterized in that: A first-side ventilation box (16) is symmetrically arranged on the outer side of the first inner support frame (6), and a second-side ventilation box (17) is symmetrically arranged on the outer side of the second inner support frame (7). Multiple first-side ventilation holes (14) are symmetrically opened inside the first inner support frame (6) and the second inner support frame (7). The first-side ventilation holes (14) are connected to the first-side ventilation box (16) and the second-side ventilation box (17). A first-side high-temperature fan (18) is symmetrically installed on the outer side of the first inner support frame (6). The input end of the first-side high-temperature fan (18) is connected to the second-side ventilation box (17) through a duct. The output end of the first-side high-temperature fan (18) is connected to the first-side ventilation box (16) through a duct.

3. A continuous heat treatment resistance furnace according to claim 1, characterized in that: The inner support frame (8) of the third type is symmetrically provided with multiple second ventilation holes (15). The outer side of the inner support frame (8) of the third type is symmetrically fixed with a third side ventilation box (19). The second ventilation hole (15) and the third side ventilation box (19) are connected. The outer side of the third side ventilation box (19) is fixed with a second air outlet pipe (20).

4. A continuous heat treatment resistance furnace according to claim 1, characterized in that: The continuous furnace body (1) is symmetrically equipped with closed doors (2) on both sides. The continuous furnace body (1) is symmetrically equipped with cylinders (3) on both sides. The output end of the cylinders (3) is fixedly connected to the closed doors (2). The continuous furnace body (1) is symmetrically equipped with furnace slide rails (5) inside. The inner side of the furnace slide rails (5) is equipped with a support frame (4).

5. A continuous heat treatment resistance furnace according to claim 1, characterized in that: Multiple inner fixing frames (10) are fixed inside the first inner support frame (6) and the second inner support frame (7), and multiple second resistive heating elements (11) are installed on the inner side of the inner fixing frame (10).

6. A continuous heat treatment resistance furnace according to claim 1, characterized in that: The No. 2 inner support frame (7) is symmetrically fixed to the No. 1 air inlet box (22). The top of the No. 2 inner support frame (7) is bolted to a central air box (23). The No. 1 air inlet box (22) and the central air box (23) are connected by a duct. The top of the central air box (23) is provided with a hot air inlet pipe (24).

7. A continuous heat treatment resistance furnace according to claim 1, characterized in that: The inner support frame (8) of the third type is fixedly connected to a suction box (30), and the top of the suction box (30) is provided with a third air outlet pipe (26).

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