Heat treatment furnace for metal heat treatment

Abstract

The utility model discloses a heat treatment furnace for metal heat treatment relates to metal hot working equipment field, including electric control bottom box and setting heat treatment furnace shell on electric control bottom box upper end, heat treatment furnace shell front end is provided with heat -proof stove door, heat -proof stove door left end is through a plurality of hinges and heat treatment furnace shell swing joint, heat -proof stove door can be completely closed in the front end of heat treatment furnace shell, the right side of heat treatment furnace shell top and right -hand member is provided with stove door handle, heat treatment furnace shell top and right -hand member all are provided with a plurality of stove door close encryption device, electric control bottom box bottom front end is equipped with air current anti -scald device, and this air current anti -scald device can when heat -proof stove door opens and takes the piece, initiatively blocks the high temperature airflow or the residual heat of heat treatment furnace inside and directly attacks the user, and simultaneously gives consideration to structural adaptability and operating safety, provides reliable anti -scald protection for metal heat treatment operation.

Description

Technical Field

[0001] This utility model belongs to the technical field of metal heat treatment equipment, specifically relating to a heat treatment furnace for metal heat treatment. Background Technology

[0002] Metal heat treatment furnaces are key equipment in industries such as machinery manufacturing and metallurgy, used for heat treatment processes such as quenching, annealing, and tempering of metal workpieces. They use an electrical control system to regulate the heating elements inside the furnace to generate high temperatures, allowing the metal workpieces to reach specific temperatures and undergo microstructural transformations. This improves the workpiece's hardness, toughness, and other mechanical properties, making it a core processing equipment for ensuring the quality of metal products. However, in actual operation of existing heat treatment furnaces for metal heat treatment, when the user opens the insulated furnace door to remove the workpiece after heat treatment, the high-temperature airflow and residual heat that have accumulated in the furnace for a long time will quickly overflow from the furnace opening, and will mostly spread downwards and towards the user's operating area. Since the area below the furnace door is the main operating space for removing the workpiece, the overflowing high-temperature airflow can easily hit the user's hands, legs and other parts, which can easily cause burns. Although some equipment reduces heat loss by thickening the insulated furnace door, it cannot completely prevent the high-temperature airflow from overflowing when the furnace door is opened. Some equipment also relies on users to wear protective equipment such as anti-scalding gloves, but the protection range is limited and cannot block the invasion of high-temperature airflow from the source, so there is still a safety risk. Utility Model Content

[0003] The purpose of this utility model is to provide a heat treatment furnace for metal heat treatment, in order to solve the problem mentioned in the background art that after heat treatment is completed, when the user opens the insulated furnace door to take out the part, the high temperature airflow and residual heat accumulated in the furnace will quickly overflow from the furnace opening and diffuse downwards to the part taking operation area, which can easily hit the user's hands and legs and cause burns.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a heat treatment furnace for metal heat treatment, comprising an electrically controlled base box and a heat treatment furnace shell disposed on the upper end of the electrically controlled base box. A heat-insulated furnace door is provided at the front end of the heat treatment furnace shell. The left end of the heat-insulated furnace door is rotatably connected to the heat treatment furnace shell through multiple hinges. The heat-insulated furnace door can be completely closed at the front end of the heat treatment furnace shell. A furnace door handle is provided on the right side of the center of the front end of the heat-insulated furnace door. Multiple furnace door closing and encryption devices are provided at the top and right end of the heat treatment furnace shell. An airflow anti-scalding device is provided at the front end of the bottom of the electrically controlled base box.

[0005] Preferably, the airflow anti-scalding device includes an air collecting pipe and air nozzles. The air collecting pipe is located laterally at the front end of the bottom of the electrical control base box, and the two are fixedly connected by screws. Multiple air nozzles are equidistantly arranged at the top of the air collecting pipe, and the multiple air nozzles are all set with their openings facing upwards.

[0006] Preferably, the airflow anti-scalding device further includes an air supply pipe and a blower box. The blower box is located at the right end of the electrical control base box. A blower is installed inside the blower box. The blower is electrically connected to an external power source. An air outlet and an air inlet are respectively provided at the front and bottom ends of the blower box. The air inlet and outlet of the blower are connected to the air inlet and air outlet respectively. The right end of the air collection pipe is connected to the air outlet through an air supply pipe.

[0007] Preferably, the furnace door closing encryption device includes a metal fixing strip, a tension rod, a fixing seat, and a movable hole. The fixing seat is fixed to the outer wall of the heat treatment furnace shell by welding. The fixing seat has a movable hole in its center. A tension rod is inserted into the movable hole. A metal fixing strip is welded to the front end of the tension rod. The metal fixing strip can block the front end of the insulated furnace door in the closed state.

[0008] Preferably, the furnace door closing encryption device further includes an anti-detachment block and a clamping spring. The anti-detachment block is fixed to the rear end of the tension rod by screws, and a clamping spring is provided between the fixing seat and the anti-detachment block. The clamping spring is sleeved on the outside of the tension rod.

[0009] Preferably, the tension rod can move back and forth in the movable hole, the diameter of the anti-detachment block is larger than the diameter of the movable hole, and the tension rod can drive the front metal fixing strip to rotate clockwise and counterclockwise.

[0010] Preferably, an electric controller is installed inside the front end of the electric control base box, and mounting feet are provided at the four corners of the bottom of the electric control base box. Heat dissipation strips are densely distributed inside the left and right ends of the electric control base box and the outer shell of the heat treatment furnace.

[0011] Preferably, an ammeter and a voltmeter are respectively installed inside the center of the front end of the electronic controller. The ammeter is located to the left of the voltmeter, a temperature display screen is installed to the left of the ammeter, and multiple control buttons are installed to the right of the voltmeter.

[0012] Preferably, the outer shell of the heat treatment furnace is provided with an inner shell, and the inner shell is provided with a furnace body, the furnace body having an opening facing forward.

[0013] Preferably, the inner walls of both the left and right ends of the heat treatment furnace body are provided with multiple tube grooves, and electric heating tubes are provided inside the multiple tube grooves.

[0014] Compared with the prior art, the present invention provides a heat treatment furnace for metal heat treatment, which has the following beneficial effects: This utility model adds a novel airflow anti-scalding device to the front end of the bottom of the electrical control box. This device can actively block the high-temperature airflow or residual heat inside the heat treatment furnace from directly hitting the user when the insulated furnace door is opened to take out the workpiece. At the same time, it takes into account the structural adaptability and operational safety, and provides reliable anti-scalding protection for metal heat treatment operations. When the insulated furnace door is opened and the heat-treated workpiece is ready to be taken out, the blower inside the blower box is started, and airflow is delivered to the air collection pipe through the air supply pipe. Multiple air nozzles at the top of the air collection pipe continuously blow air upward, which can guide the high-temperature airflow or residual heat overflowing from the heat treatment furnace upward, avoiding the high-temperature airflow directly hitting the operator's hands, legs and other parts, eliminating the risk of burns from the source and ensuring operational safety. The air collection pipe of the device is horizontally fixed at the front end of the bottom of the electrical control box. Multiple air nozzles are evenly arranged at the top to output airflow evenly, forming a continuous airflow layer that covers the area below and in front of the heat treatment furnace. At the same time, the upward-facing design of the air nozzle openings ensures that the airflow accurately guides the high-temperature waste heat upward, avoiding the dispersion of airflow that leads to a decrease in the anti-scalding effect, and adapting to the anti-scalding needs when taking out workpieces of different sizes. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the external three-dimensional structure of a heat treatment furnace for metal heat treatment according to the present invention.

[0016] Figure 2 This is a schematic diagram of the internal three-dimensional structure of a heat treatment furnace for metal heat treatment according to the present invention.

[0017] Figure 3 This is a three-dimensional structural diagram of the furnace door closing encryption device of this utility model.

[0018] Figure 4 This is a front-view three-dimensional structural diagram of the airflow anti-scalding device of this utility model.

[0019] In the diagram: 1. Mounting feet; 2. Electrical control base box; 3. Electrical controller; 4. Heat treatment furnace outer shell; 5. Insulated furnace door; 6. Furnace door handle; 7. Furnace door closing and sealing device; 8. Heat dissipation strip hole; 9. Pipe groove; 10. Heating element; 11. Heat treatment furnace body; 12. Heat treatment furnace inner shell; 13. Metal fixing strip; 14. Pull rod; 15. Fixing base; 16. Anti-detachment block; 17. Movable hole; 18. Clamping spring; 19. Airflow anti-scalding device; 20. Air collection pipe; 21. Air nozzle; 22. Air supply pipe; 23. Blower box. Detailed Implementation

[0020] 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.

[0021] This utility model provides, for example Figure 1-4 The heat treatment furnace for metal heat treatment shown includes an electrically controlled base box 2 and a heat treatment furnace shell 4 disposed on the upper part of the electrically controlled base box 2. An insulated furnace door 5 is provided at the front end of the heat treatment furnace shell 4. The left end of the insulated furnace door 5 is rotatably connected to the heat treatment furnace shell 4 via multiple hinges, allowing the insulated furnace door 5 to be completely closed at the front end of the heat treatment furnace shell 4. A furnace door handle 6 is provided on the right side of the center of the front end of the insulated furnace door 5. An electric controller 3 is disposed inside the front end of the electrically controlled base box 2. Foot plates 1 are provided at the four corners of the bottom of the electrically controlled base box 2. The interiors of the electrically controlled base box 2 and the heat treatment furnace shell 4 at both ends... All are densely covered with heat dissipation vents 8. An ammeter and a voltmeter are respectively installed inside the center of the front end of the electronic controller 3. The ammeter is located to the left of the voltmeter, and a temperature display screen is located to the left of the ammeter. Multiple control buttons are located to the right of the voltmeter. Inside the outer shell 4 of the heat treatment furnace is an inner shell 12, and inside the inner shell 12 is a furnace body 11. The furnace body 11 has its opening facing forward. Multiple tube grooves 9 are provided on the inner walls of both ends of the furnace body 11, and electric heating tubes 10 are installed inside each of the grooves 9. When using this metal heat treatment furnace… First, the metal heat treatment furnace needs to be securely placed on the mounting feet 1 at the bottom of the electrical control base box 2. Then, the power supply to the metal heat treatment furnace needs to be connected, and the insulated furnace door 5, which is currently closed, needs to be opened using the handle. At this point, the heat treatment furnace body 11 is fully exposed. Then, the metal parts to be heat treated are placed into the heat treatment furnace body 11, and the insulated furnace door 5 is closed again. After the insulated furnace door 5 is closed, it is locked using multiple furnace door closing encryption devices 7. Finally, the control buttons on the electrical controller 3 are used to lock it in place. Start the heat treatment furnace for metal heat treatment and set the heating temperature of the heating tubes 10 in the multiple tube slots 9. When the heating tubes 10 are powered on, they will emit high temperature and stop heating after reaching the set heating temperature. This will make the high temperature inside the heat treatment furnace body 11 tend to be within the set temperature range. Then, set the heat treatment time through the control button. When the heat treatment time reaches the set time, the heating tubes 10 will be de-energized. At this time, you need to wait for the temperature inside the heat treatment furnace body 11 to drop to a safe range. Then, open the heat-insulated furnace door 5 and take out the heat-treated metal parts.

[0022] like Figure 1 , Figure 2 and Figure 4 As shown, to prevent users from being scalded by the high-temperature airflow when removing parts from the heat treatment furnace, an airflow anti-scalding device 19 is installed at the front bottom of the electrical control base box 2. The core airflow delivery components of the airflow anti-scalding device 19 are the air collection pipe 20 and the air nozzles 21. The air collection pipe 20 is installed horizontally at the front bottom of the electrical control base box 2, and the two are fixedly connected by screws. This horizontal layout allows the air collection pipe 20 to cover the main operating area below the furnace door, and the screw fixing method ensures both installation stability and easy disassembly for later maintenance. Multiple air nozzles 21 are evenly spaced at the top of the air collection pipe 20, and all air nozzles 21 have their openings facing upwards. The upward opening direction ensures that the airflow is vertical. The air jets are directed upwards, precisely aimed at the direction of the high-temperature airflow when the furnace door is opened, avoiding airflow dispersion that could lead to insufficient anti-scalding effect. Simultaneously, the equidistantly arranged nozzles 21 form a uniform and continuous airflow layer, eliminating blind spots in anti-scalding and adapting to the anti-scalding needs of different parts handling positions. To provide stable power for the airflow, the airflow anti-scalding device 19 also includes an air supply pipe 22 and a blower housing 23. The blower housing 23 is fixed to the right end of the electrical control base box 2. This side-mounted installation method does not occupy the operating space at the bottom of the electrical control base box 2, nor does it interfere with the airflow delivery of the air collection pipe 20. The blower housing 23 contains a blower electrically connected to an external power source. After power is applied... It can generate a continuous airflow, and the blower casing 23 has an air outlet at the front end and an air inlet at the bottom end. The air inlets of the blower are connected to each other, and the air outlets are connected to each other. This design allows the blower to draw in ambient temperature air from below, avoiding the intake of high-temperature air from the surrounding area of ​​the furnace, which would affect the lifespan of the equipment. At the same time, the front air outlet can be directly connected to the right end of the air collection pipe 20 through the air supply pipe 22, shortening the airflow delivery path and reducing airflow loss. After the air supply pipe 22 is connected to the right end of the air collection pipe 20 and the air outlet of the blower casing 23, a complete airflow delivery channel is formed. When the user opens the insulated furnace door 5 to prepare to retrieve the parts, the blower is powered on and starts, drawing in air through the air inlet. Normal temperature air is introduced, pressurized internally, and discharged from the air outlet. The discharged airflow is transported to the air collection pipe 20 through the air supply pipe 22. The air collection pipe 20 evenly distributes the airflow to multiple air nozzles 21 at the top. The air nozzles 21 spray air upwards, which can block the high temperature airflow or residual heat overflowing from the heat treatment furnace from spreading downwards and towards the user. The high temperature airflow is guided upwards to a space away from the operating area, fundamentally eliminating the risk of burns to the user's hands and legs by the high temperature airflow. At the same time, the entire process does not require manual adjustment of the airflow. The blower can be started and stopped by the furnace door switch, which is convenient to operate and has a stable anti-scalding effect.

[0023] like Figure 1 and Figure 3As shown, multiple furnace door closing and encryption devices 7 are provided at the top and right end of the heat treatment furnace shell 4. Each furnace door closing and encryption device 7 includes a metal fixing strip 13, a tension rod 14, a fixing seat 15, and a movable hole 17. The fixing seat 15 is fixed to the outer wall of the heat treatment furnace shell 4 by welding. A movable hole 17 is provided in the center of the fixing seat 15. The tension rod 14 is inserted into the movable hole 17. The front end of the tension rod 14 is welded with a metal fixing strip 13, which can prevent the door from closing. The front end of the insulated furnace door 5 and the furnace door closing encryption device 7 also include an anti-detachment block 16 and a clamping spring 18. The anti-detachment block 16 is fixed to the rear end of the tension rod 14 by screws. A clamping spring 18 is provided between the fixed seat 15 and the anti-detachment block 16. The clamping spring 18 is sleeved on the outside of the tension rod 14. The tension rod 14 can move back and forth in the movable hole 17. The diameter of the anti-detachment block 16 is larger than the diameter of the movable hole 17. The tension rod 14 can drive the front end metal fixed stop bar 13 to rotate clockwise and counterclockwise.

[0024] like Figure 1 and Figure 3 As shown, after the insulated furnace door 5 is fully closed to the front of the heat treatment furnace, multiple furnace door closing and sealing devices 7 are needed to lock and seal the closed insulated furnace door 5. Specifically, the metal fixing bar 13 needs to be grasped and pulled forward, so that the pulling rod 14 moves forward in the movable hole 17 inside the fixing seat 15. This will compress the clamping spring 18 between the metal stop and the fixing seat 15. After the metal fixing bar 13 is pulled forward to the front of the closed insulated furnace door 5, the metal fixing bar 13 needs to be rotated so that the main body of the metal fixing bar 13 is rotated to the front of the outer wall of the front end of the insulated furnace door 5. Then, the pulled metal fixing bar 13 is released, and the compressed clamping spring 18 is released. The clamping spring 18 pushes the pull rod 14 backward through the anti-disengagement block 16, causing the metal fixing strip 13 at the front end of the pull rod 14 to clamp the front end of the closed insulated furnace door 5. Then, the other furnace door closing and sealing devices 7 are adjusted in the same way, so that multiple metal fixing strips 13 are clamped at the right end and the top front end of the closed insulated furnace door 5 respectively. The clamping spring 18 will continuously exert a backward pulling force on the metal fixing strips 13, so that the backward pulling force is always acting on the front end of the closed insulated furnace door 5, thereby keeping the insulated furnace door 5 tightly closed at the front end of the furnace body, which can increase the sealing effect between the two and prevent the high temperature inside the furnace from leaking out through the gap at the closure.

[0025] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A heat treatment furnace for metal heat treatment, comprising an electrically controlled base box (2) and a heat treatment furnace shell (4) disposed on the upper end of the electrically controlled base box (2), wherein a heat-insulated furnace door (5) is provided at the front end of the heat treatment furnace shell (4), the left end of the heat-insulated furnace door (5) is rotatably connected to the heat treatment furnace shell (4) by a plurality of hinges, the heat-insulated furnace door (5) can be completely closed at the front end of the heat treatment furnace shell (4), and a furnace door handle (6) is provided on the right side of the center of the front end of the heat-insulated furnace door (5), characterized in that: The top and right end of the heat treatment furnace shell (4) are equipped with multiple furnace door closing encryption devices (7), and the front end of the bottom of the electrical control box (2) is equipped with an airflow anti-scalding device (19). The airflow anti-scalding device (19) includes an air collection pipe (20) and a nozzle (21). The air collection pipe (20) is located horizontally at the front end of the bottom of the electrical control base box (2), and the two are fixedly connected by screws. Multiple nozzles (21) are provided at equal intervals at the top of the air collection pipe (20), and the multiple nozzles (21) are all set with their openings facing upwards.

2. The heat treatment furnace for metal heat treatment according to claim 1, characterized in that: The airflow anti-scalding device (19) also includes an air supply pipe (22) and a blower box (23). The right end of the electrical control base box (2) has a built-in blower box (23), which is equipped with a blower. The blower is electrically connected to an external power source. The front end and the bottom end of the blower box (23) are respectively provided with an air outlet and an air inlet. The air inlet and outlet of the blower are respectively connected to the air inlet and the air outlet. The right end of the air collection pipe (20) is connected to the air outlet through the air supply pipe (22).

3. The heat treatment furnace for metal heat treatment according to claim 1, characterized in that: The furnace door closing encryption device (7) includes a metal fixing strip (13), a tension rod (14), a fixing seat (15), and a movable hole (17). The fixing seat (15) is fixed to the outer wall of the heat treatment furnace shell (4) by welding. The fixed seat (15) has a movable hole (17) in the center. The tension rod (14) is inserted into the movable hole (17). The front end of the tension rod (14) is welded with a metal fixing strip (13). The metal fixing strip (13) can block the front end of the closed heat-insulating furnace door (5).

4. A heat treatment furnace for metal heat treatment according to claim 3, characterized in that: The furnace door closing encryption device (7) also includes an anti-detachment block (16) and a clamping spring (18). The anti-detachment block (16) is fixed to the rear end of the tension rod (14) by screws. A clamping spring (18) is provided between the fixing seat (15) and the anti-detachment block (16). The clamping spring (18) is sleeved on the outside of the tension rod (14).

5. A heat treatment furnace for metal heat treatment according to claim 4, characterized in that: The tension rod (14) can move back and forth in the movable hole (17). The diameter of the anti-detachment block (16) is larger than the diameter of the movable hole (17). The tension rod (14) can drive the metal fixed stop bar (13) at the front end to rotate clockwise and counterclockwise.

6. A heat treatment furnace for metal heat treatment according to claim 1, characterized in that: An electric controller (3) is installed inside the front end of the electric control base box (2). The four corners of the bottom of the electric control base box (2) are provided with mounting feet (1). The left and right ends of the electric control base box (2) and the outer shell of the heat treatment furnace (4) are densely covered with heat dissipation strip holes (8).

7. A heat treatment furnace for metal heat treatment according to claim 6, characterized in that: An ammeter and a voltmeter are respectively installed inside the center of the front end of the electronic controller (3). The ammeter is located to the left of the voltmeter. A temperature display screen is installed to the left of the ammeter, and multiple control buttons are installed to the right of the voltmeter.

8. A heat treatment furnace for metal heat treatment according to claim 1, characterized in that: The heat treatment furnace outer shell (4) is provided with a heat treatment furnace inner shell (12), and the heat treatment furnace body (11) is provided inside the heat treatment furnace inner shell (12), with the opening of the heat treatment furnace body (11) facing forward.

9. A heat treatment furnace for metal heat treatment according to claim 8, characterized in that: Multiple tube grooves (9) are provided on the inner walls of both the left and right ends of the heat treatment furnace body (11), and electric heating tubes (10) are provided inside the grooves (9).

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