A heat treatment trolley furnace

Abstract

This utility model discloses a heat treatment trolley furnace relating to the field of trolley furnace technology. The furnace body has an openable furnace door that can be raised and lowered. The lower end of the furnace door has an opening corresponding to the track. A U-shaped groove is provided along the circumference of the furnace body on the lower side of the inner wall of the furnace body. A trolley is installed within the U-shaped groove, capable of traveling along the track and sealing against the inner wall of the U-shaped groove and the furnace door. The trolley divides the furnace interior from top to bottom into a heating chamber for workpiece processing and a heat-insulating chamber for heat-protecting the track and trolley's traveling mechanism. The upper part of the trolley has a material rack for carrying workpieces and for rotating and heating the workpieces. This utility model not only effectively insulates the interior of the furnace body, ensuring efficient heat treatment of the workpieces, but also effectively insulates and protects the trolley, track, and other components. Furthermore, it enables workpiece rotation and heating, greatly improving the processing quality of the workpieces.

Description

Technical Field

[0001] This utility model relates to the field of trolley furnace technology, and in particular to a heat treatment trolley furnace. Background Technology

[0002] Bogie hearth furnaces are a type of intermittent industrial furnace widely used in the heat treatment industry. They are mainly used for heat treatment processes such as annealing, normalizing, quenching, and tempering of metal workpieces. Their core feature is the use of a movable bogie as a workpiece carrying platform, which facilitates loading and unloading and is suitable for batch processing of large and medium-sized workpieces. However, existing bogie hearth furnaces still have the following shortcomings in actual use:

[0003] 1. During the use of the bogie furnace, the bogie and the track on which the bogie travels are both placed inside the furnace body. This makes the bogie and the track prone to deformation and wear and tear under high temperature for a long time. In particular, the motor that drives the bogie and some circuits are more likely to be worn out under high temperature, which seriously affects the service life of the bogie.

[0004] 2. The seal between the trolley and the furnace body mostly adopts a rigid structure or a single sealing strip, which is prone to failure due to thermal deformation at high temperatures, resulting in heat loss and increased energy consumption.

[0005] 3. When heating workpieces in existing bogie furnaces, the workpieces are often placed on bogies or fixed racks, which limits the heating surface of the workpieces. In particular, temperature differences are prone to occur in the areas near the furnace door or furnace wall, affecting the quality of heat treatment.

[0006] Therefore, there is an urgent need for a heat treatment trolley furnace that can overcome the above-mentioned shortcomings. Utility Model Content

[0007] To overcome the shortcomings of the prior art, this utility model discloses a heat treatment trolley furnace. This utility model can not only effectively insulate the interior of the furnace body to ensure efficient heat treatment of the workpiece, but also effectively insulate and protect the trolley, track and other components. Moreover, it can rotate the workpiece for heat treatment, which greatly improves the processing quality of the workpiece.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A heat treatment trolley furnace includes a furnace body with an open end. The furnace body has a track installed on the ground and extending outward through the open end of the furnace body. The open end of the furnace body has a liftable and closable furnace door. The lower end of the furnace door has an opening corresponding to the track. The lower side of the inner wall of the furnace body has a U-shaped groove arranged around the circumference of the furnace body. A trolley is installed in the U-shaped groove, which can travel along the track and is sealed against the inner wall of the U-shaped groove and the furnace door. The trolley divides the inner cavity of the furnace body from top to bottom into a heating chamber for workpiece processing and a heat insulation chamber for heat insulation protection of the track and the traveling mechanism of the trolley. The upper part of the trolley has a material rack for carrying workpieces and for rotating and heating the workpieces.

[0010] Furthermore, the upper part of the U-shaped groove cavity is provided with a sealing groove that is set along the inner wall of the U-shaped groove and has a U-shaped structure. Both ends of the sealing groove are open structures. The trolley and the inner wall of the U-shaped groove are provided with elastic sealing strips that are interference fit with the sealing groove.

[0011] Furthermore, a second sealing groove corresponding to the sealing groove is provided on the lower part of the side of the furnace door facing the furnace body. Both ends of the second sealing groove are open structures, and a second sealing strip that is interference-fitted with the second sealing groove is provided on the end face of the trolley facing the furnace door.

[0012] Furthermore, both the elastic sealing strip and the second sealing strip are ceramic fiber rope, refractory fiber felt, or high-temperature alloy spring seals.

[0013] Furthermore, multiple sealing grooves and second sealing grooves are provided and arranged in parallel to each other, and the number of elastic sealing strips and second sealing strips on the outside of the trolley corresponds to the number of sealing grooves and second sealing grooves, respectively.

[0014] Furthermore, the upper side of the trolley facing the furnace door is provided with an inclined surface that slopes inward toward the interior of the furnace body.

[0015] Furthermore, the inner wall of the U-shaped groove corresponding to the furnace door is provided with an installation port located at the bottom of the trolley. A cooling fan is installed in the installation port, and ventilation mesh corresponding to the cooling fan and used for ventilation and heat dissipation is provided at the bottom of the furnace door.

[0016] Furthermore, the material rack includes a rotating shaft, trays, and a motor. A rotating shaft perpendicular to the trolley is rotatably mounted on the upper part of the trolley. Several trays are arranged in an orderly manner along the axial direction of the rotating shaft on the shaft body. A mounting seat is provided at the bottom of the trolley, and a motor for driving the rotating shaft to rotate is provided on the mounting seat.

[0017] Furthermore, the upper part of the pallet is provided with several raised ridges that are spaced and arranged in an orderly manner along the length of the pallet.

[0018] Furthermore, one side of the convex ridge is provided with several air passages that are spaced apart along the length of the convex ridge and penetrate the convex ridge.

[0019] Compared with the prior art, the beneficial effects of this utility model are: by sealing the trolley against the inner wall of the U-shaped groove and the furnace door, not only is the efficient heating and processing of the workpiece in the heating chamber guaranteed, but also the trolley traveling mechanism, track and motor located in the heat insulation chamber are protected by heat insulation, which provides a strong guarantee for the long-term stable operation of the trolley in the future.

[0020] By the contact between the trolley and the U-shaped groove, and the interference fit between the elastic sealing strip and the sealing groove, compared with the single sealing structure of the traditional trolley furnace, the contact between the trolley and the inner wall of the U-shaped groove first achieves initial heat insulation, while also reducing the contact between hot air and the sealing strip, greatly improving the service life and sealing effect of the sealing strip. Then, the interference seal of the sealing strip further improves its sealing and heat insulation effect.

[0021] By setting a second sealing strip and a second sealing groove, the heating chamber can be effectively sealed in conjunction with the sealing strip and the sealing groove, effectively preventing the loss of heat in the heating chamber and greatly improving the efficiency of the furnace body in heating and processing the workpiece.

[0022] By setting up a rotatable material rack, the workpiece can be heated more evenly, optimizing process efficiency and improving the processing quality of the workpiece.

[0023] By installing cooling fans and ventilation mesh, the heat insulation cavity can be effectively ventilated and cooled, which greatly improves the service life of the trolley's traveling mechanism, the material rack's motor, track, and some wire circuits, and avoids deformation and damage caused by long-term heat exposure.

[0024] By setting an inclined surface, the furnace door can fall smoothly from the end of the trolley during the descent process, providing strong support for the subsequent contact sealing of the trolley;

[0025] By setting ridges and air vents, the contact area between the workpiece and the tray can be effectively reduced, and the bottom of the workpiece can be fully heated, thereby greatly improving the heat treatment quality of the workpiece.

[0026] This invention not only provides effective heat insulation for the furnace interior, ensuring efficient heat treatment of workpieces, but also effectively protects components such as the trolley and tracks from heat. Furthermore, it enables workpieces to be rotated for heat treatment, greatly improving the processing quality. This invention is simple to operate and convenient to use, not only improving the processing quality and efficiency of workpieces, but also effectively extending the service life of the furnace. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of this utility model;

[0028] Figure 2 This is a schematic diagram of the furnace body structure of this utility model;

[0029] Figure 3 This is a schematic diagram of the trolley and material rack structure of this utility model;

[0030] Figure 4 This is a schematic diagram of the furnace door structure of this utility model;

[0031] Figure 5 This is a side view of the trolley of this utility model.

[0032] In the diagram: 1. Furnace door; 2. Ventilation mesh; 3. Opening; 4. Heating chamber; 5. Material rack; 6. Furnace body; 7. Trolley; 8. Insulation chamber; 9. U-shaped groove; 10. Track; 11. Sealing groove; 12. Mounting port; 13. Cooling fan; 14. Shaft; 15. Raised rib; 16. Airflow port; 17. Tray; 18. Rotary bearing; 19. Motor; 20. Mounting base; 21. Sealing strip; 22. Second sealing groove; 23. Inclined surface; 24. Second sealing strip. Detailed Implementation

[0033] The technical solution of this utility model will be described below with reference to the accompanying drawings of the embodiments of this utility model. In the description, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" indicating the orientation or positional relationship, they are only corresponding to the drawings of this utility model for the convenience of describing this utility model, and do not indicate or imply that the device or element referred to must have a specific orientation.

[0034] Please refer to the instruction manual appendix. Figure 1-5 This utility model provides a technical solution:

[0035] Example 1: A heat treatment trolley furnace includes a furnace body 6 with an open end. Inside the furnace body 6, there is a track 10 installed on the ground and extending outward through the open end of the furnace body 6. The open end of the furnace body 6 is provided with a liftable and openable furnace door 1. The lower end of the furnace door 1 is provided with an opening 3 corresponding to the track 10. The lower side of the inner wall of the furnace body 6 is provided with a U-shaped groove 9 arranged around the circumference of the furnace body 6. A trolley 7 is provided in the U-shaped groove 9, which can travel along the track 10 and is sealed against the inner wall of the U-shaped groove 9 and the furnace door 1. The trolley 7 divides the inner cavity of the furnace body 6 from top to bottom into a heating cavity 4 for workpiece processing and a heat insulation cavity 8 for heat insulation protection of the track 10 and the traveling mechanism of the trolley 7.

[0036] To achieve a tight seal between the trolley 7, the U-shaped groove 9, and the furnace door 1, a sealing groove 11 with a U-shaped structure is provided on the upper part of the inner cavity of the U-shaped groove 9, running along the inner wall of the U-shaped groove 9. Both ends of the sealing groove 11 are open. An elastic sealing strip 21 with an interference fit to the sealing groove 11 is provided on the corresponding surface of the trolley 7 and the inner wall of the U-shaped groove 9. The elastic sealing strip 21 is also U-shaped. A second sealing groove 22 corresponding to the sealing groove 11 is provided on the lower part of the side of the furnace door 1 facing the furnace body 6. Both ends of the second sealing groove 22 are open. The end face of 1 is provided with a second sealing strip 24 that is interference fit with the second sealing groove 22. In order to improve its sealing and heat insulation effect, multiple sealing grooves 11 and 22 are provided and arranged in parallel to each other. The number of elastic sealing strips 21 and 24 on the outside of the trolley 7 corresponds to the number of sealing grooves 11 and 22 respectively. In order to ensure the interference sealing effect of elastic sealing strips 21 and 24, both elastic sealing strips 21 and 24 are ceramic fiber ropes, refractory fiber felts or high-temperature alloy spring seals.

[0037] When the workpiece is heat-processed, the workpiece is placed on the upper part of the trolley 7, and then the trolley 7 is driven into the furnace body 1 along the track 10. The sealing strips 21 on the front end face and both sides of the trolley 7 are inserted into the sealing grooves 11 on the inner wall of the U-shaped groove 9 to form an interference seal. Then the furnace door 1 is lowered. In order to avoid the bottom of the furnace door 1 colliding with the end of the trolley 7 during the descent, the upper side of the end face of the trolley 7 facing the furnace door 1 is provided with an inclined surface 23 with the upper end inclined towards the inside of the furnace body 6. With the guidance of the inclined surface 23, the friction between the furnace door 1 and the trolley 7 is converted into the thrust of the trolley 7 moving into the furnace body 6. This not only makes the interference seal between the sealing strip 21 and the sealing groove 11 more secure, but also facilitates the subsequent closure of the furnace door 1 to the opening of the furnace body 6. As the furnace door 1 descends and closes the opening of the furnace body 6, the second sealing strip 24 at the rear end of the trolley 7 is inserted into the second sealing groove 22 to form an interference seal.

[0038] During the heating and processing of the workpiece in the furnace body 6, although the contact seal between the trolley 7 and the inner wall of the U-shaped groove 9 and the furnace door 1 can effectively prevent the loss of heat in the heating chamber 4, the heat insulation chamber 8 will still be heated due to the influence of heat transfer, which will have an adverse effect on the traveling mechanism of the trolley 7 and the track 10. For this reason, the inner wall of the U-shaped groove 9 corresponding to the furnace door 1 is provided with an installation port 12 located at the lower part of the trolley 7. A cooling fan 13 is provided in the installation port 12, and a ventilation mesh 2 corresponding to the cooling fan 13 and used for ventilation and heat dissipation is provided at the lower part of the furnace door 1.

[0039] In Example 2, to achieve uniform and efficient heat treatment of the workpiece, the upper part of the trolley 7 is provided with a material rack 5 for carrying the workpiece and for rotating and heat-treating the workpiece. Specifically, the material rack 5 includes a rotating shaft 14, a tray 17, and a motor 19. The rotating shaft 14, which is perpendicular to the trolley 7, is rotatably mounted on the upper part of the trolley 7. Specifically, a rotating bearing 18 is embedded in the upper surface of the trolley 7, and the lower end of the rotating shaft 14 is fixedly installed inside the inner ring of the rotating bearing 18. Several trays 17 are arranged in an orderly manner along the axial direction of the rotating shaft 14 on the shaft body. The bottom of the trolley 7 is provided with a mounting base 20, and a motor 19 is provided on the mounting base 20. The output end of the motor 19 passes through the trolley 7 and is fixedly connected to the lower end of the rotating shaft 14. By using the motor 19 to drive the rotating shaft 14 to rotate, the trays 17 and the workpieces on the trays 17 are rotated, so that all surfaces of the workpiece are evenly exposed to the heat source, avoiding local overheating or underheating caused by positional differences in the fixed material rack.

[0040] In order to reduce the contact area between the workpiece and the tray 17 and to ensure that the bottom of the workpiece is fully heated, the upper part of the tray 17 is provided with several protruding ribs 15 arranged at intervals along the length of the tray 17. In order to ensure that the bottom of the workpiece can effectively contact the hot air, several air passages 16 are provided on one side of the protruding ribs 15, arranged at intervals along the length of the protruding ribs 15 and penetrating the protruding ribs 15.

[0041] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended to include all changes that fall within the meaning and scope of the equivalents of the claims in this utility model, and no reference numerals in the claims should be regarded as limiting the content of the claims.

Claims

1. A heat treatment trolley furnace, comprising a furnace body (6) with one end open, characterized in that: The furnace body (6) is provided with a track (10) installed on the ground and extending outward through the opening of the furnace body (6). The opening of the furnace body (6) is provided with a furnace door (1) that can be lifted and opened. The lower end of the furnace door (1) is provided with an opening (3) corresponding to the track (10). The lower side of the inner wall of the furnace body (6) is provided with a U-shaped groove (9) arranged around the furnace body (6). The U-shaped groove (9) is provided with a trolley (7) that can travel along the track (10) and is in contact with and sealed to the inner wall of the U-shaped groove (9) and the furnace door (1). The trolley (7) divides the inner cavity of the furnace body (6) from top to bottom into a heating chamber (4) for workpiece processing and a heat insulation chamber (8) for heat insulation protection of the traveling mechanism of the track (10) and the trolley (7). The upper part of the trolley (7) is provided with a material rack (5) for carrying workpieces and for rotating and heating the workpieces.

2. The heat treatment trolley furnace according to claim 1, characterized in that: The upper part of the inner cavity of the U-shaped groove (9) is provided with a sealing groove (11) that is set along the inner wall of the U-shaped groove (9) and has a U-shaped structure. Both ends of the sealing groove (11) are open structures. The trolley (7) and the inner wall of the U-shaped groove (9) are provided with an elastic sealing strip (21) that is interference fit with the sealing groove (11).

3. The heat treatment trolley furnace according to claim 2, characterized in that: The furnace door (1) is provided with a second sealing groove (22) corresponding to the sealing groove (11) on the lower part of the side facing the furnace body (6). Both ends of the second sealing groove (22) are open structures. The trolley (7) is provided with a second sealing strip (24) that is interference-fitted with the second sealing groove (22) on the end face facing the furnace door (1).

4. A heat treatment trolley furnace according to claim 3, characterized in that: Both the elastic sealing strip (21) and the second sealing strip (24) are ceramic fiber rope, refractory fiber felt or high-temperature alloy spring seals.

5. A heat treatment trolley furnace according to claim 3, characterized in that: Multiple sealing grooves (11) and two sealing grooves (22) are provided and are arranged in parallel to each other. The number of elastic sealing strips (21) and two sealing strips (24) on the outside of the trolley (7) corresponds to the number of sealing grooves (11) and two sealing grooves (22).

6. A heat treatment trolley furnace according to claim 3, characterized in that: The upper side of the end face of the trolley (7) facing the furnace door (1) is provided with an inclined surface (23) that is inclined towards the inside of the furnace body (6).

7. A heat treatment trolley furnace according to claim 1, characterized in that: The inner wall of the U-shaped groove (9) corresponding to the furnace door (1) is provided with an installation port (12) located at the bottom of the trolley (7). A cooling fan (13) is provided in the installation port (12). A ventilation mesh (2) corresponding to the cooling fan (13) and used for ventilation and heat dissipation is provided at the bottom of the furnace door (1).

8. A heat treatment trolley furnace according to claim 1, characterized in that: The material rack (5) includes a rotating shaft (14), a tray (17) and a motor (19). The upper part of the trolley (7) is rotatably mounted with a rotating shaft (14) perpendicular to the trolley (7). Several trays (17) are arranged in an orderly manner along the axial direction of the rotating shaft (14) on the shaft body. The bottom of the trolley (7) is provided with a mounting seat (20), and the mounting seat (20) is provided with a motor (19) for driving the rotating shaft (14) to rotate.

9. A heat treatment trolley furnace according to claim 8, characterized in that: The upper part of the tray (17) is provided with several raised ribs (15) arranged in an orderly manner along the length of the tray (17).

10. A heat treatment trolley furnace according to claim 9, characterized in that: A number of air passages (16) are provided on one side of the convex ridge (15) at intervals along the length of the convex ridge (15) and through the convex ridge (15).

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