Waste heat recovery type heat treatment furnace

Abstract

The utility model discloses a waste heat recovery type heat treatment furnace which comprises a furnace body, a furnace door is arranged on the front side of the furnace body, heating elements are installed on the periphery in the furnace body, a plurality of vertical sleeves are connected in the furnace body in a rotating mode, a plurality of hooks are fixed to each sleeve and used for hanging workpieces, and the hooks are connected with the furnace body in a rotating mode. A plurality of through holes are formed in the outer walls, below the hooks, of the sleeves, and a driving mechanism for driving all the sleeves to rotate at the same time is arranged at the top of the furnace body; a heat preservation box is arranged on one side of the furnace body and communicated with the furnace body through a first pipeline, a draught fan is arranged at the top of the furnace body, the air inlet end of the draught fan is communicated with the heat preservation box through a second pipeline, the air outlet end of the draught fan is connected with a main pipe through a third pipeline, and the main pipe is connected with a plurality of branch pipes matched with the sleeves. And the branch pipes are connected with the corresponding sleeves through rotary joints, so that the sleeves can rotate in the rotary joints. And the waste heat is blown to the workpiece through the through holes in the sleeve, so that the heating area of the workpiece is increased, the heat treatment efficiency is improved, and meanwhile, the waste heat is recycled.

Description

Technical Field

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

[0002] Heat treatment is a metal heat treatment process that involves heating, holding, and cooling metal materials in a certain medium to control their properties by changing the metallographic structure of the material's surface or interior. In the casting process, heat treatment equipment is indispensable. Existing heat treatment devices have the following problems: (1) After heat treatment, the residual heat in the furnace is directly discharged and cannot be reused, resulting in energy waste; (2) Most heating elements are installed on the inner wall of the furnace. When several workpieces are placed in the furnace, the workpieces on the periphery are more easily heated, while the heating elements cannot directly heat the workpieces in the center, resulting in uneven heating of the workpieces. Utility Model Content

[0003] In view of the shortcomings of the prior art, this utility model provides a waste heat recovery type heat treatment furnace to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] A waste heat recovery type heat treatment furnace includes a furnace body with a furnace door on the front side. Heating elements are installed around the furnace body. Multiple vertical sleeves are rotatably connected inside the furnace body. Each sleeve has several hooks fixed on it for hanging workpieces. Several through holes are opened on the outer wall of each sleeve below each hook. A drive mechanism is provided at the top of the furnace body to drive all sleeves to rotate simultaneously. An insulation box is provided on one side of the furnace body and is connected to the furnace body through a first pipe. A fan is provided at the top of the furnace body. The air inlet of the fan is connected to the insulation box through a second pipe, and the air outlet of the fan is connected to a main pipe through a third pipe. Multiple branch pipes matching the sleeves are connected to the main pipe. The branch pipes are connected to the corresponding sleeves through rotary joints so that the sleeves can rotate within the rotary joints.

[0006] Preferably, the drive mechanism includes a motor mounted on the top of the furnace body, a drive shaft connected to the motor via a coupling, a drive wheel connected to the drive shaft, and a driven wheel connected to the sleeve. The drive wheel and all driven wheels are connected by a drive belt.

[0007] The above technical solution involves starting the motor, which drives the transmission shaft to rotate. Through the cooperation of the driving wheel, driven wheel, and transmission belt, all the sleeves rotate, thereby causing the hanger and the workpiece on it to rotate, so as to adjust the orientation of the workpiece and achieve uniform heating of the workpiece.

[0008] Preferably, the furnace body is provided with a first insulation layer, and the insulation box is provided with a second insulation layer.

[0009] The above technical solution can keep the furnace body warm through the first insulation layer and keep the insulation box warm through the second insulation layer.

[0010] Preferably, a first temperature sensor is provided inside the furnace body, and a second temperature sensor is provided inside the insulation box.

[0011] The above technical solution uses a first temperature sensor to detect the temperature inside the furnace and a second temperature sensor to detect the temperature inside the insulation box.

[0012] Preferably, a bracket is installed on the top of the furnace body, and the bracket has multiple mounting holes, into which the rotary joint is installed.

[0013] In the above technical solution, the rotary joint is installed on the bracket, and the bracket is installed on the furnace body, which can keep the rotary joint stable and prevent the rotary joint from shaking when the sleeve rotates.

[0014] Preferably, a first control valve is installed on the first pipe, a second control valve is installed on the second pipe, a cavity is provided in the upper part between the furnace body and the insulation box, the first control valve is located in the cavity, and a maintenance plate is provided in the cavity that is hinged to the insulation box.

[0015] The above technical solution allows heat from the furnace to be transferred to the insulation box by opening the first control valve. Since the first control valve is located within the cavity, closing the inspection plate reduces heat loss from the first pipe. Opening the second control valve allows heat from the insulation box to be transferred to the casing via a fan.

[0016] Preferably, a fourth pipe is connected to one side of the insulation box, and a third control valve is installed on the fourth pipe.

[0017] The above technical solution allows heat to be transferred to other stages through a fourth pipe after heat treatment is completed, and the remaining heat can be utilized to reduce energy waste.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] After the workpiece is hung on the hook, it is aligned with the through hole. By driving all the sleeves to rotate, the workpiece is rotated, which makes the workpiece heat evenly. In addition, the residual heat can be extracted by the fan and blown onto the workpiece through the through hole on the sleeve, thereby increasing the heating area of ​​the workpiece and facilitating the heating of the workpiece in the center of the furnace, improving the heat treatment efficiency, and realizing the reuse of residual heat. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 for Figure 1 A magnified view of a portion of the image;

[0022] Figure 3 This is a schematic diagram of the drive mechanism;

[0023] Figure 4 This is a top view of the support frame;

[0024] In the diagram: 1-furnace body, 2-heating element, 3-sleeve, 4-hook, 5-through hole, 6-insulation box, 7-first pipe, 8-fan, 9-second pipe, 10-third pipe, 11-main pipe, 12-branch pipe, 13-rotary joint, 14-motor, 15-drive wheel, 16-driven wheel, 17-first insulation layer, 18-second insulation layer, 19-first temperature sensor, 20-second temperature sensor, 21-bracket, 22-mounting hole, 23-first control valve, 24-second control valve, 25-inspection plate, 26-fourth pipe, 27-third control valve. Detailed Implementation

[0025] 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.

[0026] Example 1

[0027] Please see Figure 1-4 A waste heat recovery type heat treatment furnace includes a furnace body 1, with a furnace door on the front side of the furnace body 1. Heating elements 2, which can be electric heating tubes, are installed around the furnace body 1. Multiple vertical sleeves 3 are rotatably connected inside the furnace body 1. Several hooks 4 are fixed on each sleeve 3 for hanging workpieces. Several through holes 5 are opened on the outer wall of each sleeve 3 below each hook 4. A drive mechanism is provided at the top of the furnace body 1 to drive all sleeves 3 to rotate simultaneously. Specifically, the drive mechanism includes a motor 14 installed at the top of the furnace body, a drive shaft connected to the motor via a coupling, a drive wheel 15 connected to the drive shaft, and driven wheels 16 connected to the sleeves. The drive wheel 15 and all driven wheels 16 are connected by a transmission belt. When the motor 14 is started, it drives the drive shaft to rotate. Through the cooperation of the drive wheel 15, driven wheels 16 and transmission belt, all sleeves 3 are driven to rotate, thereby driving the hangers and the workpieces on them to rotate, so as to adjust the orientation of the workpieces and achieve uniform heating of the workpieces. In this embodiment, the driving wheel and driven wheel can be sprockets, and the transmission belt can be a chain.

[0028] The furnace body 1 is provided with a first insulation layer 17 to keep the furnace body warm, and a first temperature sensor 19 is provided inside the furnace body 1 to detect the temperature inside the furnace body 1. An insulation box 6 is provided on one side of the furnace body 1, and a second insulation layer 18 is provided inside the insulation box 6 to keep the insulation box warm. A second temperature sensor 20 is provided inside the insulation box 6 to detect the temperature inside the insulation box.

[0029] The insulation box 6 is connected to the furnace body 1 via a first pipe 7. A fan 8 is installed on the top of the furnace body 1. The air inlet of the fan 8 is connected to the insulation box 6 via a second pipe 9. The air outlet of the fan 8 is connected to a main pipe 11 via a third pipe 10. Multiple branch pipes 12 that match the sleeves are connected to the main pipe 11. The branch pipes 12 are connected to the corresponding sleeves 3 via rotary joints 13, so that the sleeves 3 can rotate within the rotary joints 13. In addition, a bracket 21 is installed on the top of the furnace body 1. The bracket 21 has multiple mounting holes 22. The rotary joints 13 are installed in the mounting holes 22. The rotary joints 13 are installed on the bracket 21, and the bracket 21 is installed on the furnace body 1. This keeps the rotary joints 13 stable and prevents them from shaking when the sleeves 3 rotate.

[0030] A first control valve 23 is installed on the first pipe 7, and a second control valve 24 is installed on the second pipe 9. A cavity is provided in the upper part between the furnace body 1 and the insulation box 6. The first control valve 23 is located within this cavity, and a maintenance plate 25, hinged to the insulation box, is provided in the cavity. Opening the first control valve 23 transfers heat from the furnace body 1 to the insulation box 6. The first control valve 23 being located within the cavity, and closing the maintenance plate 25, reduces heat loss from the first pipe 7. Opening the second control valve 24 allows heat from the insulation box 6 to be transferred to the sleeve 3 via the fan 8. It should be noted that the furnace body, insulation box, fan, second pipe, and drive mechanism can all be placed indoors as a whole, and insulation material can be wrapped around the second pipe 9, third pipe 10, main pipe 11, and branch pipe 12 to prevent heat loss.

[0031] The working principle of this embodiment is as follows: After the workpiece is hung on the hook 4, the workpiece is exactly opposite the through hole 5. The drive mechanism drives all the sleeves 3 to rotate, which in turn drives the workpiece to rotate, so that the workpiece is heated evenly. Excess heat can be discharged into the heat preservation box 6 through the first pipe 7. In addition, the heat in the heat preservation box 6 can be extracted by the fan 8 and sent to the sleeves 3. Then, the heat is blown onto the workpiece through the through hole 5 on the sleeve 3, thereby increasing the heating area of ​​the workpiece and heating the workpiece in the center of the furnace body 1, improving the heat treatment efficiency, and realizing the reuse of waste heat.

[0032] Example 2

[0033] Based on Example 1, a fourth pipe 26 is connected to one side of the heat preservation box 6, and a third control valve 27 is installed on the fourth pipe 26. After the heat treatment is completed, the heat can be transferred to other stages through the fourth pipe 26, and the remaining heat can be utilized to reduce energy waste.

[0034] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0035] 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 waste heat recovery type heat treatment furnace, characterized in that: The furnace includes a furnace body (1), a furnace door on the front side of the furnace body (1), heating elements (2) installed around the furnace body (1), and multiple vertical sleeves (3) rotatably connected inside the furnace body (1). Each sleeve (3) is fixed with several hooks (4) for hanging workpieces. Several through holes (5) are opened on the outer wall of each sleeve (3) below each hook (4). The top of the furnace body (1) is equipped with a drive mechanism to drive all the sleeves (3) to rotate simultaneously. A heat preservation box (6) is provided on one side of the furnace body (1) to keep warm. The incubator (6) is connected to the furnace body (1) through the first pipe (7). The top of the furnace body (1) is equipped with a fan (8). The air inlet of the fan (8) is connected to the incubator (6) through the second pipe (9). The air outlet of the fan (8) is connected to the main pipe (11) through the third pipe (10). Multiple branch pipes (12) matching the sleeve are connected to the main pipe (11). The branch pipes (12) are connected to the corresponding sleeves (3) through a rotary joint (13) so that the sleeves (3) can rotate inside the rotary joint (13).

2. The waste heat recovery type heat treatment furnace according to claim 1, characterized in that: The drive mechanism includes a motor (14) mounted on the top of the furnace body, a drive shaft connected to the motor via a coupling, a drive wheel (15) connected to the drive shaft, and a driven wheel (16) connected to the sleeve. The drive wheel (15) and all driven wheels (16) are connected by a drive belt.

3. The waste heat recovery type heat treatment furnace according to claim 2, characterized in that: The furnace body (1) is provided with a first insulation layer (17), and the insulation box (6) is provided with a second insulation layer (18).

4. The waste heat recovery type heat treatment furnace according to claim 3, characterized in that: The furnace body (1) is equipped with a first temperature sensor (19), and the insulation box (6) is equipped with a second temperature sensor (20).

5. A waste heat recovery type heat treatment furnace according to claim 4, characterized in that: A bracket (21) is installed on the top of the furnace body (1), and multiple mounting holes (22) are provided on the bracket (21). The rotary joint (13) is installed in the mounting holes (22).

6. A waste heat recovery type heat treatment furnace according to claim 5, characterized in that: A first control valve (23) is installed on the first pipe (7), and a second control valve (24) is installed on the second pipe (9). A cavity is provided in the upper part between the furnace body (1) and the insulation box (6). The first control valve (23) is located in the cavity, and a maintenance plate (25) is provided in the cavity and is hinged to the insulation box.

7. A waste heat recovery type heat treatment furnace according to any one of claims 1-6, characterized in that: A fourth pipe (26) is connected to one side of the insulation box (6), and a third control valve (27) is installed on the fourth pipe (26).

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