Heating furnace for stainless steel forgings

Abstract

The utility model discloses a heating furnace for stainless steel forgings, which comprises a furnace body and a furnace door arranged on the front side of the furnace body, a door frame is further arranged on the front side of the furnace body, the furnace door is vertically and movably arranged on the door frame, and a driving mechanism for driving the furnace door to move up and down is arranged on the top of the door frame. The furnace door structure is characterized in that extending plates extending backwards are arranged on the two sides of the top of the furnace door respectively, two supporting plates extending backwards are arranged on the door frame, each supporting plate is arranged under the corresponding extending plate, and the supporting plates are arranged above the furnace body; the top of each supporting plate is further provided with a spring, and when the furnace door is in a closed state, the bottom of the extending plate abuts against the spring on the top of one supporting plate. And when the furnace door is in an open state, the extension plate moves upwards and is far away from the spring. According to the utility model, the maintenance rate is reduced, and the energy consumption is also saved.

Description

Technical Field

[0001] The utility model relates to the forging field, in particular to a heating furnace used for stainless steel forgings. Background Art

[0002] When forging stainless steel forgings, it is necessary to use a heating furnace to heat the forgings first, and then forge them. Among them, when the heating furnace door is opened and closed, the motor is used to drive the furnace door to move. When the furnace door is closed, since the furnace door descends at a certain speed, there will be a collision between the furnace door and the ground. Multiple collisions will cause the bottom of the furnace door to deform and be damaged, and the ground in contact with the furnace door will also be damaged. At the same time, the temperature at the furnace door is relatively high, especially after the furnace door is opened, the temperature at the furnace door of the heating furnace will basically be consistent with the temperature inside the heating furnace. If a rubber buffer is set on the ground under the furnace door, the rubber will melt. If a spring is set, the spring will be subjected to the high temperature after the furnace door is opened. After the spring is heated, its elastic deformation ability will also be damaged, resulting in spring failure. If the closing speed of the furnace door is reduced, a lot of heat in the heating furnace will escape. After the furnace door is closed, the furnace temperature needs to be raised to the predetermined temperature again, resulting in increased energy consumption.

[0003] At the same time, the furnace door is connected to the furnace body. If the connection between the furnace door and the furnace body needs maintenance, the furnace body needs to be repaired together, and the maintenance cost is even higher. Summary of the invention

[0004] The utility model aims to provide a heating furnace for stainless steel forgings. By using the structure, the convenience and stability of opening and closing the furnace door are improved, the noise is reduced, and the maintenance rate of the furnace door can be reduced.

[0005] To achieve the above object, the technical solution adopted by the utility model is: a heating furnace for stainless steel forgings, comprising a furnace body and a furnace door arranged at the front side of the furnace body, a door frame is also arranged at the front side of the furnace body, the furnace door is vertically movably mounted on the door frame, and a driving mechanism for driving the furnace door to move up and down is arranged at the top of the door frame;

[0006] Extension plates extending backward are respectively provided on both sides of the top of the furnace door, and two support plates extending backward are provided on the door frame, each of the support plates is arranged directly below one of the extension plates, and the support plates are arranged above the furnace body;

[0007] A spring is also provided on the top of each support plate. When the furnace door is closed, the bottom of the extension plate rests on a spring on the top of the support plate; when the furnace door is open, the extension plate moves upward and away from the spring.

[0008] In the above technical solution, a positioning support rod is screwed on the top of the support plate, the lower part of the spring is sleeved on the outside of the positioning support rod, and the top of the spring is arranged above the positioning support rod.

[0009] In the above technical solution, the door frame includes a horizontal plate and vertical plates respectively arranged on both sides of the bottom of the horizontal plate, the rear side of each vertical plate is connected to the front side of the furnace body, and the top of the vertical plate is connected to the end of the horizontal plate;

[0010] A vertical slide rail is arranged on the inner side surface of each vertical plate, and a vertical slide groove is arranged on both sides of the furnace door respectively. The furnace door is slidably connected with the vertical slide rail on the side through the vertical slide groove.

[0011] In the above technical solution, a plurality of guide rollers are rotatably installed in the vertical slide groove, and the plurality of guide rollers are arranged at intervals from top to bottom, and the outer surfaces of the guide rollers are against the inner side surfaces of the vertical slide rail.

[0012] In the above technical solution, a reinforcing plate is provided on the side of each vertical plate, and the reinforcing plate is arranged on the side of the furnace body. The angle between the reinforcing plate and the vertical plate is 15° to 45°, the top of the reinforcing plate is connected to the top of the vertical plate, and the bottom of the reinforcing plate is connected to the ground.

[0013] In the above technical solution, each support plate is installed on the vertical plate, and a pull plate is also provided on the top outer side of the support plate. The bottom of the pull plate is connected to the top outer side of the support plate, and the front side of the pull plate is connected to the vertical plate.

[0014] In the above technical solution, a heat insulating pad is provided between the support plate and the furnace body, the bottom of the heat insulating pad abuts against the top surface of the furnace body, and the bottom of the support plate abuts against the top surface of the heat insulating pad.

[0015] In the above technical solution, the driving mechanism is installed on the horizontal plate, and the driving mechanism includes a motor assembly, a winding drum and a pull rope. The winding drum is rotatably installed on the horizontal plate, and the motor assembly is installed on the horizontal plate. The motor assembly is configured to drive the winding drum to rotate, one end of the pull rope is wound around the winding drum, and the other end of the pull rope is connected to the middle part of the top surface of the furnace door.

[0016] In the above technical solution, the driving mechanism includes a motor assembly, a first gear, a second gear, a chain and a counterweight, the first gear and the second gear are rotatably mounted on the horizontal plate, the first gear is arranged just above the middle of the top surface of the furnace door, the second gear is arranged at one end of the horizontal plate, and the outer end of the second gear is arranged outside the horizontal plate, the motor assembly is mounted on the horizontal plate, and the motor assembly is configured to drive the first gear to rotate;

[0017] The middle part of the chain is meshed with the top outer surfaces of the first gear and the second gear respectively, the counterweight block is arranged beside the vertical plate on one side, one end of the chain is connected to the middle part of the top surface of the furnace door, and the other end of the chain is connected to the counterweight block.

[0018] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0019] 1. In the utility model, a door frame is used to limit the furnace door. The door frame is arranged at the front side of the furnace body, extension plates are arranged on both sides of the top of the furnace door, a support plate extending backward is arranged on the door frame, and a spring is arranged on the support plate. In this way, when the furnace door is closed, the extension plate and the spring can buffer and slow down the closing of the furnace door, prevent the furnace door from hitting the ground, prevent damage to the furnace door, and at the same time speed up the closing speed of the furnace door, reduce energy consumption, and reduce costs;

[0020] 2. In the utility model, a positioning support rod is also arranged inside the spring. The positioning support rod can be used to limit the descent of the furnace door. Under the buffering effect of the spring, the positioning support rod can also be used to limit the position. In this way, even if a collision occurs, the furnace door will not be damaged. Only the positioning support rod, the extension plate or the support plate need to be repaired and replaced, and the repair and replacement cost is lower.

[0021] 3. In the utility model, guide rollers are arranged in the vertical slide grooves of the furnace door, and the guide rollers are used for vertical movement guidance, so that the smoothness of the furnace door during opening and closing can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the first embodiment of the utility model;

[0023] Figure 2 It is a schematic cross-sectional view of the structure of the first embodiment of the present utility model;

[0024] Figure 3 It is a schematic diagram of the partial structure of the support plate and the spring in the first embodiment of the utility model;

[0025] Figure 4 It is a schematic diagram of the structure of the extension plate and the spring in the first embodiment of the utility model when the furnace door is closed;

[0026] Figure 5 It is a schematic diagram of a partial cross-sectional structure of the connection between the furnace door and the vertical plate in a top view in the first embodiment of the utility model;

[0027] Figure 6 It is a structural schematic diagram of another embodiment of the utility model.

[0028] Among them: 1. furnace body; 2. furnace door; 3. door frame; 4. driving mechanism; 5. extension plate; 6. support plate; 7. spring; 8. positioning support rod; 9. horizontal plate; 10. vertical plate; 11. vertical slide rail; 12. vertical slide groove; 13. guide roller; 14. reinforcement plate; 15. pull plate; 16. insulation pad; 17. motor assembly; 18. take-up reel; 19. pull rope; 20. first gear; 21. second gear; 22. chain; 23. counterweight. DETAILED DESCRIPTION

[0029] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0030] Example 1: See Figures 1 to 5 As shown, a heating furnace for stainless steel forgings comprises a furnace body 1 and a furnace door 2 arranged at the front side of the furnace body 1, a door frame 3 is also arranged at the front side of the furnace body 1, the furnace door 2 is vertically movably mounted on the door frame 3, and a driving mechanism 4 for driving the furnace door 2 to move up and down is arranged on the top of the door frame 3;

[0031] Extension plates 5 extending backward are respectively provided on both sides of the top of the furnace door 2, and two support plates 6 extending backward are provided on the door frame 3, each of the support plates 6 is arranged directly below one of the extension plates 5, and the support plates 6 are arranged above the furnace body 1;

[0032] A spring 7 is also provided on the top of each support plate 6. When the furnace door 2 is closed, the bottom of the extension plate 5 rests on the spring 7 on the top of the support plate 6; when the furnace door 2 is open, the extension plate 5 moves upward and away from the spring 7.

[0033] In this embodiment, the furnace door is driven to rise and fall by a driving mechanism. When the furnace door rises, the furnace door is opened, so that the forgings can be taken out of the furnace body, or the forgings that need to be heated can be placed in the furnace body. When the furnace door descends, the furnace door is closed, so that a closed space is formed in the furnace body, so that the inside of the furnace body can be heated to a predetermined temperature to heat the forgings. Among them, a door frame is directly arranged on the front side of the furnace body, and the furnace door and the driving mechanism are installed on the door frame. The door frame and the furnace body adopt a split structure. In this way, if there is a problem with the door frame or the connection between the furnace door and the door frame, only the door frame needs to be repaired or replaced, and the maintenance cost is lower. At the same time, extension plates are arranged on both sides of the top of the furnace door, and support plates extending backward are arranged on the door frame, and springs are arranged on the support plates, so that the furnace door can be closed at a conventional speed, or at a faster speed. When the furnace door descends, it can descend at a certain speed (not a particularly slow speed). After the extension plate contacts the spring, the furnace door continues to descend, so that the extension plate will compress the spring, and the restoring force of the spring will give the extension plate an upward thrust, so that the descending speed of the furnace door can be quickly reduced. At this time, the furnace door is close to being completely closed. Even if the furnace door descends more slowly, the air exchange channel between the inside and outside of the furnace body is relatively small, and the heat dissipated from the inside of the furnace body is relatively small. When the furnace door continues to descend, the compression amount of the spring is greater, so that the furnace door descends more slowly. After the spring is compressed to a certain distance, or after the bottom of the furnace door is against the ground, the furnace door cannot continue to descend, and at this time the furnace door completely closes the furnace body. In this way, after the furnace door is closed, the heat emitted by the furnace body is relatively small (because the furnace body itself has a heat preservation and insulation layer), and the heat emitted will not have much impact on the spring, will not affect the elasticity of the spring itself, and extend the service life of the spring. At the same time, if the extension plate, support plate or spring is damaged, it only needs to be repaired and replaced, and the maintenance cost is low.

[0034] At the same time, when the driving mechanism drives the furnace door to start rising, when the furnace door is just pulled up, the power required by the driving mechanism will be greater, that is, the energy consumption will be higher. Due to the existence of the spring, the restoring force of the spring will give the extension plate and the furnace door an upward thrust, which can reduce the initial driving force of the driving mechanism, reduce the starting power, and reduce costs.

[0035] See also Figures 2 to 5 As shown, a positioning support rod 8 is screwed to the top of the support plate 6 , the lower part of the spring 7 is sleeved on the outside of the positioning support rod 8 , and the top of the spring 7 is arranged above the positioning support rod 8 .

[0036] In this embodiment, the positioning support rod is screwed on the support plate, which can not only limit the spring and prevent the spring from bending and deformation, but also enable the spring to always be in a vertical state to support the extension plate. At the same time, the positioning support rod and the support plate are screwed, and screw holes are provided on the support plate. Screw holes are provided at the bottom of the positioning support rod and on the support plate, which can facilitate the installation and removal of the positioning support rod, and at the same time, the height position of the positioning support rod can be adjusted. When the furnace door is lowered, if the elastic recovery ability of the spring becomes weak, it may happen that after the furnace door contacts the ground, the restoring force of the spring cannot withstand the weight of the furnace door. Therefore, through the positioning support rod, after the spring is compressed to a certain extent, the extension plate is against the positioning support rod, and the furnace door cannot continue to descend. At this time, there is a little gap between the bottom of the furnace door and the ground, or the bottom of the furnace door just touches the bottom surface, which can prevent the furnace door from colliding with the ground and preventing damage to the furnace door. The extension plate, support plate and positioning support rod will bear this impact force. In this way, even if the extension plate, support plate and positioning support rod are damaged, they can be directly repaired and replaced. Compared with the repair and replacement of the furnace door, the repair and replacement cost is low. Of course, if the distance between the top of the positioning support rod and the ground is less than the distance between the extension plate and the bottom of the furnace door, when the furnace door is against the ground, the extension plate will not contact the positioning support rod. At this time, the positioning support rod plays a role in limiting the spring. Of course, if the ground under the furnace door is worn, the positioning support rod will be used to support the extension plate. The position of the positioning support rod can be adjusted according to the actual situation.

[0037] See also Figure 1 , 2 As shown in FIG. 5 , the door frame 3 includes a horizontal plate 9 and vertical plates 10 respectively arranged on both sides of the bottom of the horizontal plate 9, the rear side of each vertical plate 10 is connected to the front side of the furnace body 1, and the top of the vertical plate 10 is connected to the end of the horizontal plate 9;

[0038] A vertical slide rail 11 is disposed on the inner side surface of each vertical plate 10 , and a vertical slide groove 12 is disposed on both sides of the furnace door 2 , respectively. The furnace door 2 is slidably connected to the vertical slide rail 11 on the side via the vertical slide groove 12 .

[0039] The bottom of the vertical plate is fixed to the ground with bolts to limit the vertical plate, and the vertical slide rail and the vertical slide groove are set to limit the up and down movement of the furnace door, so that the furnace door can only move up and down to realize the opening and closing of the furnace door. At the same time, the vertical plate is also connected to the front side of the furnace body, so that the door frame and the furnace body are connected together, and the vertical plate and the furnace body are detachably connected, for example, by bolts, screw holes are set on the front side of the furnace body, and the vertical plate is screwed to the screw holes of the furnace body through the bolts.

[0040] See also Figure 5As shown, a plurality of guide rollers 13 are rotatably installed in the vertical slide groove 12 , and the plurality of guide rollers 13 are arranged at intervals from top to bottom, and the outer surfaces of the guide rollers 13 abut against the inner side surfaces of the vertical slide rail 11 .

[0041] The axis of the guide roller is arranged perpendicular to the vertical slide rail, so that when the furnace door moves up and down, the guide roller and the vertical slide rail are in rolling contact, so that the furnace door moves up and down more smoothly and prevents the occurrence of jamming.

[0042] See also Figure 2 As shown, a reinforcing plate 14 is provided on the side of each vertical plate 10. The reinforcing plate 14 is arranged on the side of the furnace body 1. The reinforcing plate 14 and the vertical plate 10 form an angle of 15° to 45°. The top of the reinforcing plate 14 is connected to the top of the vertical plate 10, and the bottom of the reinforcing plate 14 is connected to the ground.

[0043] By setting the reinforcing plate, the reinforcing plate, the vertical plate and the ground form a triangular structure, which is used to increase the strength of the door frame, prevent the door frame from deformation and damage, and ensure safety in use.

[0044] See also Figures 2 to 5 As shown, each of the support plates 6 is installed on the vertical plate 10 , and a pull plate 15 is also provided on the top outer side of the support plate 6 , the bottom of the pull plate 15 is connected to the top outer side of the support plate 6 , and the front side of the pull plate 15 is connected to the vertical plate 10 .

[0045] The setting of the pull plate is used to increase the contact between the support plate and the vertical plate, increase the strength of the support plate, and prevent the support plate from being deformed by the weight of the extension plate and the furnace door, thereby ensuring the strength and service life of the support plate.

[0046] See also Figures 2 to 5 As shown, a heat insulating pad 16 is provided between the support plate 6 and the furnace body 1 , the bottom of the heat insulating pad 16 abuts against the top surface of the furnace body 1 , and the bottom of the support plate 6 abuts against the top surface of the heat insulating pad 16 .

[0047] The support plate is placed against the top surface of the furnace body through the heat insulation pad, so that the furnace body can support the support plate. When the furnace door moves down, the furnace body can also share the support force on the furnace door, thus preventing the support plate from deformation and damage as much as possible and extending its service life. At the same time, the use of the heat insulation pad can prevent heat from being transferred to the spring as much as possible, thus extending the service life of the spring.

[0048] See also Figure 1 , 2As shown, the driving mechanism 4 is installed on the transverse plate 9, and the driving mechanism 4 includes a motor assembly 17, a winding drum 18 and a pull rope 19. The winding drum 18 is rotatably installed on the transverse plate 9, and the motor assembly 17 is installed on the transverse plate 9. The motor assembly 17 is configured to drive the winding drum 18 to rotate, one end of the pull rope 19 is wound on the winding drum 18, and the other end of the pull rope 19 is connected to the middle of the top surface of the furnace door 2.

[0049] In this embodiment, the motor assembly adopts a combination of a motor and a reducer. The motor is connected to the reel through the reducer, thereby driving the reel to rotate and realizing the reeling and unreeling of the pull rope. Among them, a controller is set on the door frame to control the operation of the motor assembly. When the motor assembly is working, when the reel is driven to reel the pull rope onto the reel, the bottom of the pull rope is close to the reel, thereby driving the furnace door to move up and realize the opening of the furnace door. When the reel is driven to unreel the pull rope, the bottom of the pull rope is away from the reel, so that the furnace door is closed by the weight of the furnace door.

[0050] See also Figure 6 As shown, in another embodiment, the driving mechanism 4 includes a motor assembly 17, a first gear 20, a second gear 21, a chain 22 and a counterweight 23, the first gear and the second gear are rotatably mounted on the horizontal plate, the first gear is arranged just above the middle of the top surface of the furnace door, the second gear is arranged at one end of the horizontal plate, and the outer end of the second gear is arranged outside the horizontal plate, the motor assembly is mounted on the horizontal plate, and the motor assembly is configured to drive the first gear to rotate;

[0051] The middle part of the chain is meshed with the top outer surfaces of the first gear and the second gear respectively, the counterweight block is arranged beside the vertical plate on one side, one end of the chain is connected to the middle part of the top surface of the furnace door, and the other end of the chain is connected to the counterweight block.

[0052] The motor assembly adopts a combination of a motor and a reducer. The chain forms a U-shaped structure that opens downward, one end of which is connected to the furnace door, and the other end is connected to the counterweight. When the motor drives the first gear to rotate through the reducer, taking the second gear set at the right end of the horizontal plate as an example, the counterweight is on the right side of the vertical plate on the right. When the motor assembly drives the first gear to rotate clockwise, it will drive the chain between the first gear and the second gear to move to the right. In this process, the furnace door moves upward and the counterweight moves downward. When the motor assembly drives the first gear to rotate counterclockwise, it will drive the chain between the first gear and the second gear to move to the left, which will drive the counterweight to move upward and the furnace door to move downward.

[0053] By setting the counterweight, the furnace door can be balanced, so that a smaller power motor can be selected to drive the opening and closing of the furnace door, saving energy and reducing costs.

[0054] At the same time, in the utility model, the motor assembly is located on the horizontal plate, away from the furnace body, so that the heat generated by the operation of the furnace body will not affect the normal use of the motor assembly as much as possible, thereby extending the service life of the motor assembly and reducing the maintenance rate.

Claims

1. A heating furnace for stainless steel forgings, comprising a furnace body and a furnace door arranged at the front side of the furnace body, the front side of the furnace body is also provided with a door frame, the furnace door is vertically movably mounted on the door frame, and a driving mechanism for driving the furnace door to move up and down is provided on the top of the door frame; characterized in that: Extension plates extending backward are respectively provided on both sides of the top of the furnace door, and two support plates extending backward are provided on the door frame, each of the support plates is arranged directly below one of the extension plates, and the support plates are arranged above the furnace body; A spring is also provided on the top of each support plate. When the furnace door is closed, the bottom of the extension plate rests on a spring on the top of the support plate; when the furnace door is open, the extension plate moves upward and away from the spring.

2. The heating furnace for stainless steel forgings according to claim 1, characterized in that: A positioning support rod is screwed on the top of the support plate, the lower part of the spring is sleeved on the outside of the positioning support rod, and the top of the spring is arranged on the upper part of the positioning support rod.

3. The heating furnace for stainless steel forgings according to claim 1, characterized in that: The door frame includes a horizontal plate and vertical plates respectively arranged on both sides of the bottom of the horizontal plate, the rear side of each vertical plate is connected to the front side of the furnace body, and the top of the vertical plate is connected to the end of the horizontal plate; A vertical slide rail is arranged on the inner side surface of each vertical plate, and a vertical slide groove is arranged on both sides of the furnace door respectively. The furnace door is slidably connected with the vertical slide rail on the side through the vertical slide groove.

4. The heating furnace for stainless steel forgings according to claim 3, characterized in that: A plurality of guide rollers are rotatably mounted in the vertical slide groove, and the plurality of guide rollers are arranged at intervals from top to bottom, and the outer surfaces of the guide rollers abut against the inner side surfaces of the vertical slide rail.

5. The heating furnace for stainless steel forgings according to claim 3, characterized in that: A reinforcing plate is provided on the side of each vertical plate. The reinforcing plate is arranged on the side of the furnace body. An angle of 15° to 45° is formed between the reinforcing plate and the vertical plate. The top of the reinforcing plate is connected to the top of the vertical plate, and the bottom of the reinforcing plate is connected to the ground.

6. The heating furnace for stainless steel forgings according to claim 3, characterized in that: Each of the support plates is mounted on the vertical plate, and a pull plate is provided on the outer side of the top of the support plate. The bottom of the pull plate is connected to the outer side of the top of the support plate, and the front side of the pull plate is connected to the vertical plate.

7. The heating furnace for stainless steel forgings according to claim 6, characterized in that: A heat insulating pad is arranged between the support plate and the furnace body, the bottom of the heat insulating pad abuts against the top surface of the furnace body, and the bottom of the support plate abuts against the top surface of the heat insulating pad.

8. The heating furnace for stainless steel forgings according to claim 3, characterized in that: The driving mechanism is installed on the horizontal plate, and the driving mechanism includes a motor assembly, a winding drum and a pull rope. The winding drum is rotatably installed on the horizontal plate, and the motor assembly is installed on the horizontal plate. The motor assembly is configured to drive the winding drum to rotate. One end of the pull rope is wound around the winding drum, and the other end of the pull rope is connected to the middle of the top surface of the furnace door.

9. The heating furnace for stainless steel forgings according to claim 3, characterized in that: The driving mechanism includes a motor assembly, a first gear, a second gear, a chain and a counterweight, the first gear and the second gear are rotatably mounted on the horizontal plate, the first gear is arranged just above the middle of the top surface of the furnace door, the second gear is arranged at one end of the horizontal plate, and the outer end of the second gear is arranged outside the horizontal plate, the motor assembly is mounted on the horizontal plate, and the motor assembly is configured to drive the first gear to rotate; The middle part of the chain is meshed with the top outer surfaces of the first gear and the second gear respectively, the counterweight block is arranged beside the vertical plate on one side, one end of the chain is connected to the middle part of the top surface of the furnace door, and the other end of the chain is connected to the counterweight block.

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