Temperature compensation device for heating furnace

Abstract

The temperature compensation device for the heating furnace comprises a heat preservation cover body and a plurality of baking devices, the heat preservation cover body is used for covering a furnace opening of the heating furnace and extends in the discharging direction of the heating furnace, and the heat preservation cover body is provided with a discharging opening communicated with the furnace opening; the roaster bodies are connected to the heat preservation cover body and used for jetting flames into the heat preservation cover body to heat the thin plate, and the roaster bodies are arranged at intervals in the discharging direction. According to the temperature compensation device for the heating furnace, due to the combination of the heat preservation cover body and the roaster, a temperature compensation mode combining local heat insulation and active heating is formed, the formation of gradient temperature difference is effectively inhibited, the uniformity of the subsequent rolling effect is ensured, meanwhile, heat loss in the temperature compensation process can be greatly reduced, and the service life of the heating furnace is prolonged. And the heat energy utilization rate is increased, energy consumption can be reduced, and high economic value is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of heating furnace technology, and specifically relates to a heating furnace heat compensation device. Background Technology

[0002] A walking beam furnace is a continuous heat treatment device used in the metallurgical industry. It intermittently feeds billets through the periodic lifting and translating of a walking beam. When heat-treating thin titanium alloy sheets, the timing of the walking beam's movement limits the discharge speed, resulting in a relatively slow discharge rate. The head of the sheet exiting the furnace first is exposed to the external environment for a longer period, causing a rapid temperature drop at the head and creating a significant temperature gradient along the length of the sheet. This temperature inhomogeneity directly affects the microstructure uniformity of the titanium alloy sheet, easily leading to problems such as sheet warping and excessive thickness deviation during subsequent rolling, thus reducing the rolling quality of the titanium alloy sheet. Utility Model Content

[0003] This utility model provides a heating furnace temperature compensation device that can eliminate the gradient temperature difference formed when the thin plate is discharged, thus ensuring the quality of subsequent rolling.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a heating furnace heat compensation device, comprising:

[0005] A heat-insulating cover is used to cover the furnace opening of a heating furnace and extends along the discharge direction of the heating furnace. The heat-insulating cover has a discharge port that communicates with the furnace opening.

[0006] Several baking devices are connected to the heat insulation cover and are used to spray flames into the heat insulation cover to heat the thin plate. The several baking devices are arranged at intervals along the discharge direction.

[0007] In one possible implementation, the heat insulation hood is provided with a baffle wall extending downward from the inner top wall, and a smoke exhaust pipe is also connected to the top wall of the heat insulation hood. A heating zone is formed between the baffle wall and the furnace opening, and a smoke exhaust zone is formed between the baffle wall and the discharge port.

[0008] The oven is located within the heating zone; the exhaust pipe is connected to the exhaust zone.

[0009] In some embodiments, the heating furnace supplementary heating device further includes an air duct; the air duct is connected to a plurality of air branch pipes, and the plurality of air branch pipes are connected one-to-one to a plurality of baking ovens; the air branch pipes are provided with flexible sections.

[0010] In some embodiments, a heat exchange cylinder is fitted around the outer periphery of the exhaust duct, and the air duct is connected to the heat exchange cylinder.

[0011] In some embodiments, a pressure relief assembly is connected to the air duct, the pressure relief assembly comprising:

[0012] A connecting pipe is connected to the air duct and extends upward, with a first flange at the upper end of the connecting pipe;

[0013] The second flange is connected above the first flange; and

[0014] A rupture disc is sandwiched between the first flange and the second flange. The side surface of the rupture disc is provided with several grooves, which extend radially outward from the center of the rupture disc.

[0015] In some embodiments, a protective mesh cover is provided above the second flange, the protective mesh cover having a receiving cavity with an opening facing the rupture disc, the receiving cavity being vertically corresponding to the rupture disc.

[0016] In some embodiments, the protective mesh cover is threadedly connected to a clamping rod at its center, the clamping rod extending downwards to abut against the rupture disc above.

[0017] In one possible implementation, the heating furnace supplementary heating device further includes a gas pipeline; the gas pipeline is connected to a plurality of gas branch pipes, and the plurality of gas branch pipes are connected to a plurality of baking devices in a one-to-one correspondence.

[0018] In one possible implementation, the heating furnace heat compensation device further includes:

[0019] Multiple cantilever rollers are rotatably connected to the side wall of the insulation cover, and all extend horizontally into the insulation cover; the multiple cantilever rollers are spaced apart along the discharge direction.

[0020] In one possible implementation, the outer end of the insulation cover is slidably connected to a sealing door in the vertical direction, the sealing door being used to block or open the discharge port.

[0021] The beneficial effect of the heating furnace supplementary heating device provided by this utility model is that by setting a heat insulation cover at the furnace opening of the heating furnace, a space relatively isolated from the external environment is formed, which significantly reduces the heat exchange efficiency between the thin plate and the outside air during the furnace exit process, and provides a sufficient time window for the active heat supplementation function of the oven.

[0022] When the sheet begins to exit the furnace, the heat exchanger immediately starts, continuously heating the head of the sheet that exits first. As the sheet continues to exit, the middle and tail sections of the sheet enter the heat insulation hood in sequence. Multiple heat exchangers arranged at intervals along the discharge direction ensure that the entire length of the sheet is continuously heated after exiting the furnace, effectively suppressing the formation of temperature gradients and making the overall temperature distribution of the sheet more uniform. This meets the stringent requirements of high-precision rolling for temperature uniformity. After the sheet is discharged from the outlet, it is directly connected to the subsequent rolling equipment, ensuring rolling quality.

[0023] Compared with the prior art, the heating furnace supplementary heating device provided in this embodiment forms a supplementary heating mode that combines local insulation and active heating through the combination of insulation cover and baking device. This effectively suppresses the formation of gradient temperature difference, ensures the uniformity of subsequent rolling effect, and at the same time, can greatly reduce heat loss during the supplementary heating process, improve heat energy utilization, help reduce energy consumption, and has high economic value. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A side sectional view of a heating furnace heat compensation device provided in an embodiment of this utility model;

[0026] Figure 2 This is a rear cross-sectional view of a heating furnace heat compensation device provided in an embodiment of the present invention.

[0027] Figure 3 A cross-sectional view of the pressure relief assembly provided in an embodiment of this utility model;

[0028] Figure 4 A top view of the pressure relief assembly provided in an embodiment of this utility model;

[0029] Figure 5 This is a top view of the rupture disc provided in an embodiment of the present invention.

[0030] The following are the labeling elements in the figure:

[0031] 1. Insulation cover; 11. Discharge port; 12. Baffle wall; 13. Heating zone; 14. Smoke exhaust zone; 2. Baking unit; 3. Smoke exhaust pipe; 4. Air pipe; 41. Air branch pipe; 411. Flexible section; 5. Heat exchanger; 6. Pressure relief assembly; 61. Connecting pipe; 611. First flange; 62. Second flange; 63. Rupture disc; 631. Scored groove; 64. Protective net cover; 641. Receiving cavity; 65. Tightening rod; 7. Gas pipe; 71. Gas branch pipe; 8. Cantilever roller; 9. Sealing door; 10. Heating furnace; 20. Thin plate. Detailed Implementation

[0032] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0033] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or indirectly on the other element. It should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" or "several" means two or more, unless otherwise explicitly specified.

[0034] When heat-treating titanium alloy sheets in a heating furnace, the sheets are relatively long and thin, so it takes a relatively long time for the tail end of the sheet to completely leave the furnace opening. The head end of the sheet, which comes out of the furnace first, is exposed to the external environment for a long time, causing the temperature to drop rapidly. This results in a significant temperature gradient along the length of the sheet, which directly affects the uniformity of the subsequent rolling process.

[0035] To address the aforementioned issues, existing technologies primarily employ two methods for temperature compensation: one is to increase the set temperature within the heating furnace, thereby enhancing the overall heating level to compensate for the temperature drop during the discharge process; the other is to add a heat insulation cover to the furnace opening, constructing a localized heat insulation space at the discharge end to slow down the cooling rate.

[0036] However, the inventors discovered that increasing the set temperature inside the heating furnace requires the thin plate to be subjected to an overheated state inside the furnace, which can easily cause abnormal grain structure of titanium alloys, affecting their mechanical properties. At the same time, it also increases energy consumption. Adding a heat insulation cover to the furnace opening has limited effect in slowing down the cooling process. In particular, the heat dissipation rate of the thin plate is relatively fast, and a significant temperature gradient will still form inside the heat insulation cover, which cannot meet the temperature uniformity requirements of high-precision rolling.

[0037] To resolve the above issues, please refer to the following: Figures 1 to 5 The present invention provides a heating furnace supplementary heating device. The heating furnace supplementary heating device includes a heat insulation cover 1 and a plurality of heating elements 2. The heat insulation cover 1 is used to cover the furnace opening of the heating furnace 10 and extends along the discharge direction of the heating furnace 10. The heat insulation cover 1 has a discharge port 11 that communicates with the furnace opening. The plurality of heating elements 2 are connected to the heat insulation cover 1 and are used to spray flames into the heat insulation cover 1 to heat the thin plate 20. The plurality of heating elements 2 are arranged at intervals along the discharge direction.

[0038] Figure 1 The direction of the middle arrow indicates the discharge direction of the titanium alloy sheet 20. After the titanium alloy sheet 20 is sent out of the furnace opening of the self-heating furnace 10, it enters the heat preservation cover 1. Under the baking action of multiple bakers 2, it can always maintain the set temperature state until it is discharged from the discharge port 11 and directly connected to the subsequent rolling equipment, thus ensuring the rolling effect of the titanium alloy sheet 20.

[0039] This embodiment provides a heating furnace heat replenishment device. By setting a heat insulation cover 1 at the furnace opening of the heating furnace 10, a space relatively isolated from the external environment is formed, which significantly reduces the heat exchange efficiency between the thin plate 20 and the outside air during the furnace exit process, and provides a sufficient time window for the active heat replenishment function of the baker 2.

[0040] When the sheet 20 begins to exit the furnace, the heat exchanger 2 is immediately activated to continuously heat and replenish the head of the sheet 20 that exits first. As the sheet 20 exits, the middle and tail sections of the sheet 20 enter the heat insulation hood 1 in sequence. The multiple heat exchangers 2 arranged at intervals along the discharge direction ensure that the entire length of the sheet 20 is continuously heated after exiting the furnace, effectively suppressing the formation of temperature gradients and making the overall temperature distribution of the sheet 20 more uniform. This meets the stringent requirements of high-precision rolling for temperature uniformity. After the sheet 20 is discharged from the discharge port 11, it is directly connected to the subsequent rolling equipment to ensure rolling quality.

[0041] Compared with the prior art, the heating furnace supplementary heating device provided in this embodiment forms a supplementary heating mode that combines local insulation and active heating through the combination of insulation cover 1 and baking device 2. This effectively suppresses the formation of gradient temperature difference, ensures the uniformity of subsequent rolling effect, and at the same time, can greatly reduce heat loss during the supplementary heating process, improve heat energy utilization, help reduce energy consumption, and has high economic value.

[0042] The thermal insulation cover 1 includes a steel structure shell and an inner lining installed on the steel structure shell. The steel structure shell is welded together from channel steel and other shaped steel to ensure the rigidity of the thermal insulation cover 1. The inner lining is a thermal insulation material with a certain thickness that is laid on the inner wall of the steel structure shell. It has high heat resistance and plays the role of heat insulation.

[0043] The baker 2 can adopt a burner structure commonly found in existing technologies, which can mix air and gas in a specific ratio and ignite them to form a flame for baking the thin plate 20, keeping the thin plate 20 at a set temperature.

[0044] Furthermore, the multiple bakingers 2 arranged along the discharge direction can have their spray power and action time precisely controlled according to parameters such as the discharge speed and real-time temperature of the thin plate 20. The temperature control system enables fine control of the overall temperature of the thin plate 20, avoiding structural defects caused by overheating or uneven heating, and further improving product quality.

[0045] In some embodiments, the aforementioned heat insulation cover 1 may be adopted as follows: Figure 1 The structure shown. See also Figure 1 The heat insulation cover 1 is provided with a baffle wall 12 extending downward from the inner top wall. The top wall of the heat insulation cover 1 is also connected to a smoke exhaust pipe 3. A heating zone 13 is formed between the baffle wall 12 and the furnace opening, and a smoke exhaust zone 14 is formed between the baffle wall 12 and the discharge port 11. The baking oven 2 is located in the heating zone 13. The smoke exhaust pipe 3 is connected to the smoke exhaust zone 14.

[0046] The exhaust duct 3 is installed on the top wall of the insulation cover 1 to facilitate the upward discharge of flue gas from the insulation cover 1, thereby preventing the flue gas from interfering with the heating process. The baffle wall 12 is made of refractory material and extends downward from the inner top wall of the insulation cover 1. It can guide the flue gas generated in the heating zone 13 downward around the bottom of the baffle wall 12 and enter the exhaust zone 14, so as to drive the flames sprayed by the baker 2 to spray downward and directly act on the thin plate 20, thereby improving the heat replenishment efficiency and helping to reduce energy consumption.

[0047] A modified embodiment of the above-mentioned heating furnace heat compensation device is described in [reference needed]. Figure 1 and Figure 2A heating furnace heating device also includes an air duct 4; the air duct 4 is connected to a plurality of air branch pipes 41, which are connected one-to-one to a plurality of baking ovens 2; the air branch pipes 41 are provided with flexible sections 411.

[0048] Air duct 4 can be connected to the air source of heating furnace 10, saving the configuration of related equipment. Air duct 4 is located above the heat insulation cover 1. After air enters air duct 4 from one side of heating furnace 10, it is distributed to each air branch pipe 41, and then transported to baking oven 2 through flexible section 411, providing sufficient combustion air for the combustion of fuel in baking oven 2.

[0049] The flexible section 411 can be used to compensate for the errors generated during the installation of each air branch pipe 41. At the same time, it can alleviate the stress caused by equipment vibration and thermal expansion and contraction of the air branch pipe 41, prevent pipe rupture, ensure a stable supply of combustion air, and ensure the continuous and efficient operation of the oven 2.

[0050] In some embodiments, the exhaust duct 3 and the air duct 4 may be connected by a means such as Figure 1 The structure shown. See also Figure 1 The exhaust pipe 3 is fitted with a heat exchange cylinder 5, and the air pipe 4 is connected to the heat exchange cylinder 5.

[0051] In this embodiment, the air duct 4 can be configured as an upper section and a lower section, which are respectively connected to the heat exchange cylinder 5. Multiple air branch pipes 41 are all connected to the lower section. The upper section is used to introduce air into the heat exchange cylinder 5, and the lower section is used to export the heat-exchanged air and distribute it to each air branch pipe 41.

[0052] Since the flue gas discharged from the exhaust pipe 3 still has a high temperature, a heat exchange cylinder 5 is installed around the exhaust pipe 3 to transfer the heat of the high temperature flue gas into the heat exchange cylinder 5. The cold air in the air pipe 4 is preheated when it flows through the heat exchange cylinder 5 before being delivered to the oven 2.

[0053] By using the waste heat from flue gas to preheat the combustion air, the initial air temperature is increased, which helps to enhance fuel combustion efficiency, reduce energy consumption, realize heat recovery and reuse, and improve the economic efficiency of the equipment.

[0054] In some embodiments, the air duct 4 described above may be as follows: Figure 1 , Figure 3 and Figure 5 The structure shown. See also Figure 1 , Figure 3 and Figure 5A pressure relief assembly 6 is connected to the air duct 4. The pressure relief assembly 6 includes a connecting pipe 61, a second flange 62, and a rupture disc 63. The connecting pipe 61 is connected to the air duct 4 and extends upward. The upper end of the connecting pipe 61 is provided with a first flange 611. The second flange 62 is connected above the first flange 611. The rupture disc 63 is sandwiched between the first flange 611 and the second flange 62. Several grooves 631 are provided on the side surface of the rupture disc 63. The grooves 631 extend radially outward from the center of the rupture disc 63.

[0055] To prevent flammable gases from entering the air duct 4 and causing an explosion upon contact with a source of ignition or other heat, a pressure relief component 6 is installed on the air duct 4 in this embodiment. When the pressure inside the air duct 4 reaches a set value, the pressure relief component 6 bursts to release the pressure, thus preventing an explosion accident in the air duct 4.

[0056] Specifically, the first flange 611 and the second flange 62 are connected by bolts. The preload of the bolts is used to reliably install the rupture disc 63 between the first flange 611 and the second flange 62, which facilitates the installation and replacement of the rupture disc 63.

[0057] When the pressure inside the air duct 4 exceeds the set threshold of the rupture disc 63, the stress concentration at the groove 631 on the rupture disc 63 causes it to rupture first, thereby releasing the high-pressure gas inside the air duct 4 through the connecting pipe 61. The design of the rupture disc 63 and the groove 631 allows for precise control of the pressure relief, quickly releasing pressure when the pipeline is overpressurized, preventing pipeline rupture, and ensuring the safety of equipment and personnel.

[0058] It should be noted that the groove 631 on the rupture disc 63 is an extremely narrow groove. Figure 5 To clearly show the groove 631, its width has been enlarged. The thickness of the rupture disc 63 is determined by the pressure of the air duct 4 under normal operating conditions, and the depth of the groove 631 is determined by the maximum pressure that the air duct 4 is set to withstand. In this embodiment, the thickness of the rupture disc 63 is 1 mm, and the depth of the groove 631 is 0.4 mm.

[0059] In some embodiments, the pressure relief component 6 described above may also employ, for example... Figure 3 and Figure 4 The structure shown. See also Figure 3 and Figure 4 A protective mesh cover 64 is provided above the second flange 62. The protective mesh cover 64 has a receiving cavity 641 with an opening facing the rupture disc 63. The receiving cavity 641 corresponds vertically to the rupture disc 63.

[0060] The protective mesh cover 64 is a mesh structure formed by welding multiple round steel bars. The multiple round steel bars are arranged at intervals along the circumference of the second flange 62. To simplify installation, the outer ends of the multiple round steel bars are directly welded to the top surface of the second flange 62. The inner ends of each round steel bar extend inward and upward and then converge and weld together to form a receiving cavity 641 inside the protective mesh cover 64.

[0061] When the rupture disc 63 ruptures, the receiving cavity 641 of the protective mesh cover 64 is used to catch the fragments of the rupture disc 63, preventing the fragments from flying and injuring people or damaging surrounding equipment. The protective mesh cover 64 provides safety protection for the rupture of the rupture disc 63, avoiding secondary injuries and equipment damage caused by the fragments, and further improving the safety and reliability of the device.

[0062] In some embodiments, the protective mesh 64 and the rupture disc 63 may also be provided with an interface such as... Figure 3 The structure shown. See also Figure 3 The protective net cover 64 is threaded with a tightening rod 65 at its center, which extends downward to abut against the top of the rupture disc 63.

[0063] The protective mesh cover 64 has a connecting block at its center. The inner ends of multiple round steel bars are welded to the connecting block to form an integral protective mesh cover 64. The tightening rod 65 is threaded onto the connecting block. By rotating the tightening rod 65, it is pressed downward against the center of the rupture disc 63 to prevent the rupture disc 63 from resonating and causing malfunction when the air duct 4 vibrates.

[0064] A modified embodiment of the above-mentioned heating furnace heat compensation device is described in [reference needed]. Figure 1 A heating furnace supplementary heating device also includes a gas pipeline 7; the gas pipeline 7 is connected to a plurality of gas branch pipes 71, and the plurality of gas branch pipes 71 are connected to a plurality of baking ovens 2 in a one-to-one correspondence.

[0065] Gas pipeline 7 is connected to the gas source of heating furnace 10, reducing the need for gas supply equipment. Gas is distributed through gas pipeline 7 to each gas branch pipe 71, and then delivered to the corresponding baking oven 2. After mixing with air, it is burned to generate a flame for active heat supplementation of thin plate 20. The arrangement of gas pipeline 7 and each gas branch pipe 71 ensures a stable gas supply. By installing proportional regulating valves on each gas branch pipe 71, the gas flow rate of each baking oven 2 can be precisely controlled, achieving flexible and precise heating and meeting the heat supplementation needs of thin plate 20 under different operating conditions.

[0066] A modified embodiment of the above-mentioned heating furnace heat compensation device is described in [reference needed]. Figure 1 and Figure 2A heating furnace heat replenishment device also includes multiple cantilever rollers 8, which are rotatably connected to the side wall of the heat insulation cover 1 and extend horizontally into the heat insulation cover 1; the multiple cantilever rollers 8 are arranged at intervals along the discharge direction.

[0067] Multiple cantilever rollers 8 are connected to a transmission mechanism, which drives the cantilever rollers 8 to rotate, thereby realizing the function of transporting the thin plate 20. This makes the transport of the thin plate 20 within the insulation cover 1 more stable and helps to ensure the stable operation of the heat replenishment process.

[0068] The outer end of the cantilever roller 8 is connected to a rotary joint for supplying cooling water to the inner cavity of the cantilever roller 8 to cool the inner end roller head portion of the cantilever roller 8 and ensure its function of stably conveying the sheet 20 blank.

[0069] When the heating furnace 10 is used to heat treat other blanks besides the sheet 20 and no additional heating is required, the heating device can be removed. Multiple cantilever rollers 8 are rotatably connected to the side wall of the insulation cover 1, assembling them into a single unit. This facilitates the overall assembly and disassembly of the device and helps improve installation efficiency.

[0070] For example, the above-mentioned insulation cover 1 can also adopt the following: Figure 1 The structure shown. See also Figure 1 The outer end of the heat insulation cover 1 is slidably connected to a sealing door 9 in the up-down direction. The sealing door 9 is used to block or open the discharge port 11.

[0071] The top of the insulation cover 1 is equipped with a lifting mechanism, which is connected to the sealing door 9 and is used to drive the sealing door 9 to slide up and down along the insulation cover 1. During the process of the thin plate 20 being discharged from the furnace, the sealing door 9 is always in the open state to ensure that the thin plate 20 is discharged from the discharge port 11 in time after being reheated. During this process, the lifting height of the sealing door 9 is only enough to allow the thin plate 20 to pass through smoothly, so as to minimize the heat loss inside the insulation cover 1.

[0072] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements 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 heating furnace heat compensation device, characterized in that, include: A heat insulation cover (1) is used to cover the furnace opening of the heating furnace (10) and extends along the discharge direction of the heating furnace (10). The heat insulation cover (1) has a discharge port (11) communicating with the furnace opening; and Several baking devices (2) are connected to the heat insulation cover (1) for spraying flames into the heat insulation cover (1) to heat the thin plate (20). Several baking devices (2) are arranged at intervals along the discharge direction.

2. The heating furnace supplementary heating device as described in claim 1, characterized in that, The heat insulation cover (1) is provided with a baffle wall (12) extending downward from the inner top wall, and the top wall of the heat insulation cover (1) is also connected to a smoke exhaust pipe (3); a heating zone (13) is formed between the baffle wall (12) and the furnace opening, and a smoke exhaust zone (14) is formed between the baffle wall (12) and the discharge port (11); The oven (2) is located in the heating zone (13); the exhaust pipe (3) is connected to the exhaust zone (14).

3. The heating furnace supplementary heating device as described in claim 2, characterized in that, The heating furnace heating device further includes an air duct (4); the air duct (4) is connected to a plurality of air branch pipes (41), and the plurality of air branch pipes (41) are connected one-to-one to a plurality of baking ovens (2); the air branch pipes (41) are provided with flexible sections (411).

4. The heating furnace supplementary heating device as described in claim 3, characterized in that, The exhaust pipe (3) is fitted with a heat exchange cylinder (5) on its outer periphery, and the air pipe (4) is connected to the heat exchange cylinder (5).

5. A heating furnace supplementary heating device as described in claim 3, characterized in that, A pressure relief assembly (6) is connected to the air duct (4), and the pressure relief assembly (6) includes: A connecting pipe (61) is connected to the air duct (4) and extends upward. The upper end of the connecting pipe (61) is provided with a first flange (611). A second flange (62) is connected above the first flange (611); and A rupture disc (63) is sandwiched between the first flange (611) and the second flange (62). The side surface of the rupture disc (63) is provided with a plurality of grooves (631), which extend radially outward from the center of the rupture disc (63).

6. The heating furnace supplementary heating device as described in claim 5, characterized in that, A protective mesh cover (64) is provided above the second flange (62). The protective mesh cover (64) has a receiving cavity (641) with an opening facing the rupture disc (63). The receiving cavity (641) corresponds vertically to the rupture disc (63).

7. A heating furnace supplementary heating device as described in claim 6, characterized in that, The protective mesh cover (64) is threadedly connected to a tension rod (65) at its center, which extends downward to abut against the top of the rupture disc (63).

8. A heating furnace heat compensation device as described in claim 1, characterized in that, The heating furnace supplementary heating device further includes a gas pipeline (7); the gas pipeline (7) is connected to a plurality of gas branch pipes (71), and the plurality of gas branch pipes (71) are connected to a plurality of baking devices (2) in a one-to-one correspondence.

9. A heating furnace heat compensation device as described in claim 1, characterized in that, The heating furnace replenishment device further includes: Multiple cantilever rollers (8) are rotatably connected to the side wall of the heat insulation cover (1) and extend horizontally into the heat insulation cover (1); the multiple cantilever rollers (8) are spaced apart along the discharge direction.

10. A heating furnace heat compensation device as described in claim 1, characterized in that, The outer end of the heat insulation cover (1) is slidably connected to a sealing door (9) in the up-down direction. The sealing door (9) is used to block or open the discharge port (11).

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