Cooling pipeline system of iron casting aging treatment furnace

Abstract

The invention relates to the technical field of aging treatment, in particular to a cooling pipeline system of an iron casting aging treatment furnace, which comprises a furnace body, a limiting frame arranged at one end of the furnace body, a furnace door arranged in the limiting frame, and a top lifting driving device of the furnace body; a gas conveying device is arranged at the end, away from the furnace door, of the furnace body, an exhaust pipe is arranged at the top of the furnace body, and the exhaust pipe and the gas conveying device jointly form a gas flow channel from bottom to top. A transmission conveying device is arranged in the furnace body, and a workpiece bearing device is arranged above the transmission conveying device; the gas conveying device comprises a gas conveying piece, a gas conveying header pipe is arranged at the gas outlet end of the gas conveying piece, a frame-shaped branch pipe is arranged at the end of the gas conveying header pipe, cooling branch pipes distributed in an array mode are arranged on the frame-shaped branch pipe, and the cooling branch pipes are located at the bottom of the furnace body and distributed on the two sides of the furnace body; the air flow path is optimized in the cooling stage of the cooling furnace, and the utilization efficiency of cold air is improved by introducing a turbulent flow mechanism, so that the cooling time is effectively shortened.

Description

Technical Field

[0001] The invention relates to the technical field of aging treatment, and in particular to a cooling pipeline system of an aging treatment furnace for cast iron parts. Background Art

[0002] Aging treatment of cast iron parts, as a key heat treatment process, aims to eliminate the internal stress generated during the casting process, thereby stabilizing the size and shape of the castings and significantly improving their mechanical properties; this treatment process is mainly divided into two categories: natural aging and artificial aging. Natural aging is the process of placing the casting in an open-air environment for more than half a year, allowing it to slowly deform under natural conditions, thereby gradually eliminating or reducing the residual stress inside the casting.

[0003] Artificial aging, also known as thermal aging, is a process in which the casting is placed inside an aging furnace and heated to a certain temperature (usually between 550 and 650°C) by the aging furnace for stress relief annealing, in order to achieve the effect of quickly and thoroughly eliminating residual stress.

[0004] The Chinese invention patent with application number CN202110372758.8 discloses an electromagnetically sealed aging furnace, which includes a furnace body and a sealing mechanism; the furnace body includes a first door body and a second door body; the sealing mechanism includes a hollow tube, an insertion rod, a first sealing assembly and a second sealing assembly; the hollow tube is arranged at the first door body; one end of the insertion rod is arranged in the furnace body, and the other end of the insertion rod passes through the hollow tube and extends out of the furnace body; the first sealing assembly includes a sealing plate and a first sealing ring; one end of the sealing plate is connected to one end of the insertion rod, and the second sealing ring is arranged at one end of the sealing plate; the sealing plate includes an electromagnet; the first door body and the second door body are respectively provided with permanent magnets; the second sealing assembly includes a second sealing ring and a hydraulic cylinder; by setting the hydraulic cylinder, the first door body and the second door body are in a closed state; through the combination of the electromagnet and the permanent magnet, the first door body and the second door body are respectively fitted with the sealing plate; by setting the first sealing ring and the second sealing ring, the furnace body is sealed to reduce heat loss.

[0005] Although current technology can effectively seal the furnace body by installing the first sealing ring and the second sealing ring to reduce heat loss, the furnace environment still needs to be strictly controlled when performing heat aging treatment on cast iron parts. Specifically, it is necessary to ensure that the temperature difference in the furnace is maintained within ±25°C, the heating rate does not exceed 50°C / hour, and the cooling rate must also be controlled below 20°C / hour. This is because if the heating rate is too fast, the temperature of the thin-walled area in the component will rise rapidly, far exceeding the thick-walled area, which will cause the temperature difference inside the component to expand sharply, triggering the generation of additional temperature stress, posing a threat to the quality of the component.

[0006] On the other hand, if the cooling process is not handled properly, not only will the effect of the thermal aging treatment be greatly reduced, it may even induce temperature stresses (i.e., secondary stresses) similar to the original residual stresses. These stresses will remain in the components, directly destroying the effects previously expected to be achieved through thermal aging treatment.

[0007] In view of the above analysis, it is particularly urgent to develop a cooling pipeline system designed for aging treatment of cast iron parts. The system needs to be able to accurately control the rate of change of the temperature in the furnace to ensure that the heating and cooling processes meet the process requirements, thereby effectively avoiding the adverse effects of temperature stress on the quality of cast iron parts and improving the overall effect and stability of thermal aging treatment. Summary of the invention

[0008] The object of the present invention is to provide a cooling pipeline system for an aging treatment furnace for cast iron parts to solve the technical problems raised in the above-mentioned background technology.

[0009] To achieve the above object, the present invention provides the following technical solutions: A cooling pipe system for an aging treatment furnace for cast iron parts comprises a furnace body, a limit frame is provided at one end of the furnace body, a furnace door is provided inside the limit frame, and the feature is that a lifting drive device for driving the furnace door to move up and down is provided on the top of the furnace body; A gas delivery device is provided at one end of the furnace body away from the furnace door, an exhaust pipe is provided on the top of the furnace body, and the exhaust pipe and the gas delivery device together form an air flow channel from bottom to top; A transmission conveyor device is provided inside the furnace body, and a workpiece carrying device is provided above the transmission conveyor; The gas delivery device includes a gas delivery component, a gas delivery main pipe is provided at the gas outlet end of the gas delivery component, a frame-shaped branch pipe is provided at the end of the gas delivery main pipe, and array-distributed cooling branch pipes are provided on the frame-shaped branch pipe. The cooling branch pipes are located at the bottom of the furnace body and are distributed on both sides of the furnace body.

[0010] Preferably, the furnace body is provided with symmetrically distributed support parts inside, and the support parts are provided with array-distributed gas guide devices; The air guide device comprises rotating parts symmetrically arranged on both sides of the cooling branch pipe, and an air guide portion is arranged on the outer side of the rotating part, and the air guide portion is in contact with the bottom of the supporting part; One end of the rotating member extending out of the furnace body is provided with a rotating portion, and the rotating portion is used to drive the rotating member to rotate.

[0011] Preferably, the air guide portion comprises a fixed portion, the fixed portion is arranged on the outside of the rotating member, a movable portion is arranged inside the fixed portion, and an elastic portion is arranged between the movable portion and the fixed portion; A movable groove is provided at the bottom of the fixed part, and a fixed block is provided at the bottom of the movable part. The fixed block is slidably connected with the movable groove.

[0012] Preferably, the rotating part includes a gear, which is arranged at one end of the rotating member passing through the furnace body, and a rack is provided on the outside of the gear, the rack is meshed with the gear, and a pushing part is provided at the end of the rack, and the pushing part is connected to the top of the furnace body.

[0013] Preferably, a connecting block is provided on the inner top of the furnace body, and symmetrically distributed arc portions are provided on the connecting block, and array-distributed adjustment portions are provided on the arc portions; The adjusting portion comprises a mounting groove arranged on the connecting block, an arc block is rotatably connected in the mounting groove, and an adjusting member is arranged between the arc block and the mounting groove.

[0014] Preferably, the transmission and conveying device includes rotating rollers, the rotating roller array is distributed at the bottom of the furnace body, a sprocket is provided at one end of the rotating roller, the sprocket is located on the outside of the furnace body, the outsides of all the sprockets are connected to a chain belt, and the end of the chain belt is connected to a driving part for transmission.

[0015] Preferably, the workpiece carrying device comprises a carrying member, the carrying member is located above the rotating roller, a ventilation frame distributed in an array is provided on the top of the carrying member, and the workpiece is placed inside the ventilation frame.

[0016] Preferably, the lifting drive device includes support columns symmetrically arranged on the top of the furnace body, the tops of the two support columns are commonly connected to a rotating rod, the rotating rod is symmetrically provided with winding wheels, the winding wheels are provided with traction members, and the end of the traction member away from the winding wheel is connected to the top of the furnace door.

[0017] Preferably, the lifting drive device also includes a transmission wheel, which is arranged in the middle of the rotating rod, a driving member is provided on the top of the furnace body, a driving wheel is provided at the output end of the driving member, and a transmission belt is provided between the driving wheel and the transmission wheel.

[0018] Technical effects and advantages of the present invention: 1. The present invention significantly improves the utilization efficiency of cold air by optimizing the air flow path during the cooling stage of the cooling furnace and introducing a turbulence mechanism. If the temperature difference between the areas exceeds the set value, the state of the air guide device in the corresponding area is adjusted to balance the temperature; if the temperature difference between the top and the bottom is too large, the air guide device is adjusted to the first working state to form an upward and downward airflow circulation; if the cooling rate is slow, it is adjusted to the second working state to increase the air flow rate and turbulence to improve the replacement efficiency.

[0019] 2. The present invention designs a special processing mechanism. For annular cylindrical workpieces, by monitoring the temperature difference between the inner and outer rings of the workpiece, when the temperature difference exceeds the set value, the arc block is used to push the workpiece to deflect to a certain extent, so that the bottom of the workpiece is tilted. This design allows the cold air discharged from the cooling branch pipe to more easily enter the inner ring of the workpiece, effectively cooling the internal space, thereby avoiding the problem of temperature stress changes caused by excessive temperature difference between the inner and outer rings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the main structure of the present invention; Figure 2 It is a structural schematic diagram of the workpiece carrying device of the present invention; Figure 3 It is a schematic diagram of the internal structure of the furnace body of the present invention; Figure 4 It is a structural schematic diagram of the gas guide device of the present invention; Figure 5 It is a structural schematic diagram of the telescopic part of the present invention; Figure 6 It is a schematic diagram of a first working state of the air guide device of the present invention; Figure 7 It is a schematic diagram of a second working state of the air guide device of the present invention; Figure 8 It is a schematic diagram of a third working state of the air guide device of the present invention; Fig. 9 is a schematic diagram of a fourth working state of the gas guide device of the present invention; Fig.10 It is a structural schematic diagram of the regulating part of the present invention; Fig.11 It is a schematic diagram of the cross-sectional structure of the adjustment part of the present invention; Fig.12 It is a schematic diagram of the structure of the gas transmission device of the present invention.

[0021] In the figure: 1, furnace body; 2, furnace door; 3, lifting drive device; 301, support column; 302, rotating rod; 303, transmission wheel; 304, driving wheel; 305, driving member; 306, transmission belt; 307, winding wheel; 308, traction member; 4, transmission and conveying device; 401, rotating roller; 402, sprocket wheel; 403, chain belt; 404, driving part; 5, gas transmission device; 501, gas transmission member; 502, gas transmission main pipe; 503, frame branch pipe; 504, cooling branch pipe; 6, gas guide device; 601, rotating Moving part; 602, air guide part; 6021, fixed part; 6022, movable part; 6023, elastic part; 6024, movable groove; 6025, fixed block; 603, rotating part; 6031, gear; 6032, rack; 6033, pushing part; 7, adjusting part; 701, mounting groove; 702, arc block; 703, adjusting part; 8, workpiece bearing device; 801, bearing part; 802, ventilation frame; 9, exhaust pipe; 10, connecting block; 11, arc part; 12, limit frame; 13, supporting part. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] Reference Figures 1 to 12 As shown, the present invention provides a cooling pipeline system for an aging treatment furnace for cast iron parts, including a furnace body 1, a limit frame 12 is provided at one end of the furnace body 1, a furnace door 2 is provided inside the limit frame 12, and a lifting drive device 3 is provided on the top of the furnace body 1 to drive the furnace door 2 to move up and down.

[0024] The furnace door 2 is connected to the limit frame 12 by limiting sliding. The furnace door 2 is driven to slide back and forth inside the limit frame 12 by the lifting drive device 3. The furnace door 2 completes the opening and closing of the feed port of the furnace body 1 during the up and down movement.

[0025] An air delivery device 5 is provided at one end of the furnace body 1 away from the furnace door 2, and an exhaust pipe 9 is provided on the top of the furnace body 1. The exhaust pipe 9 and the air delivery device 5 together form an air flow channel from bottom to top.

[0026] The gas delivery device 5 includes a fan, which forces cold air into the furnace. The exhaust pipe 9 is arranged on the top of the furnace, and the hot air is discharged from the exhaust hole on the top of the furnace. The cold air replaces the hot air in the furnace.

[0027] A transmission and conveying device 4 is provided inside the furnace body 1, and a workpiece carrying device 8 is provided above the transmission and conveying device.

[0028] The workpiece-carrying device 8 is used to support the workpiece to be heat-aged, and the transmission and conveying device 4 is used to transport the workpiece-carrying device 8 to the inside of the furnace body 1 .

[0029] The gas delivery device 5 includes a gas delivery component 501, a gas delivery main pipe 502 is provided at the gas outlet end of the gas delivery component 501, a frame-shaped branch pipe 503 is provided at the end of the gas delivery main pipe 502, and an array of cooling branch pipes 504 are provided on the frame-shaped branch pipe 503. The cooling branch pipes 504 are located at the bottom of the furnace body 1, and the cooling branch pipes 504 are distributed on both sides of the furnace body 1.

[0030] A hole is opened at the lower part of the side wall of the furnace body 1, and the cooling branch pipe 504 is inserted into the furnace. The cooling branch pipe 504 is made of 304 material. A manual ball valve is installed on each cooling branch pipe 504 to adjust the air intake of each cooling branch pipe 504, so as to ensure uniform cooling of each zone. In order to ensure the safety of the site, the cooling branch pipe 504 is provided with insulation measures. The cooling branch pipe 504 is collected outside the furnace to the gas main pipe 502, and the gas main pipe 502 is made of Q235 material. A solenoid valve is installed on the gas main pipe 502, which receives the control system signal to open and close according to the cooling process requirements. A manual ball valve is installed on the gas main pipe 502 to adjust the gas supply of the gas main pipe 502, and can also be used to close the cooling pipeline for a long time. An exhaust pipe 9 is added to the top of the furnace body 1 to lead the high-temperature gas discharged from the furnace to the outside of the factory building.

[0031] Reference Figures 1 to 5 As shown, the furnace body 1 is provided with symmetrically distributed support parts 13 inside, and the support parts 13 are provided with array-distributed gas guide devices 6 .

[0032] The air guide device 6 includes rotating members 601 symmetrically arranged on both sides of the cooling branch pipe 504 . An air guide portion 602 is arranged on the outer side of the rotating member 601 . The air guide portion 602 is in contact with the bottom of the support portion 13 .

[0033] The air guide portion 602 is deflected by controlling the rotation of the rotating member 601 . During the deflection of the air guide portion 602 , the gas exhausted from the cooling branch pipe 504 is guided so that the gas is evenly distributed inside the furnace body 1 .

[0034] One end of the rotating member 601 extending out of the furnace body 1 is provided with a rotating portion 603 , and the rotating portion 603 is used to drive the rotating member 601 to rotate.

[0035] Reference Figures 4 to 5 As shown, the air guide portion 602 includes a fixed portion 6021 , which is disposed outside the rotating member 601 , a movable portion 6022 is disposed inside the fixed portion 6021 , and an elastic portion 6023 is disposed between the movable portion 6022 and the fixed portion 6021 .

[0036] The fixed part 6021 is slidably connected to the movable part 6022 , and the angle between the fixed part 6021 and the supporting part 13 can be adjusted by controlling the rotation of the rotating member 601 , so that the fixed part 6021 can guide the gas discharged from the cooling branch pipe 504 .

[0037] A movable groove 6024 is provided at the bottom of the fixed portion 6021 , and a fixed block 6025 is provided at the bottom of the movable portion 6022 . The fixed block 6025 is slidably connected to the movable groove 6024 .

[0038] When the air guide 602 is in the first working state, the air guide 602 distributed on both sides of the cooling branch pipe 504 and the inner wall of the furnace body 1 together form a triangular frame, which guides the gas blown out from the cooling branch pipe 504 to the inner top of the furnace body 1 (specifically, Figure 6 as shown).

[0039] When the air guide 602 is in the second working state, the air guide 602 distributed on both sides of the cooling branch pipe 504 and the inner wall of the furnace body 1 together form a triangular frame, but there is a gap at the sharp corner of the triangular frame, and the gap compresses the gas blown out from the cooling branch pipe 504 (for example, Figure 7 as shown).

[0040] When the air guides 602 are in the third working state, the air guides 602 distributed on both sides of the cooling branch pipe 504 are in a deflected and mutually parallel state, and the deflected and mutually parallel air guides the gas blown out from the cooling branch pipe 504 (specifically, Figure 8 as shown).

[0041] When the air guides 602 are in the fourth working state, the air guides 602 distributed on both sides of the cooling branch pipe 504 are in a state of conflicting with each other, and the conflicting air guides 602 block the air outlet end of the cooling branch pipe 504 (for example, Fig. 9 as shown).

[0042] Reference Figures 4 to 5 As shown, the rotating part 603 includes a gear 6031, which is arranged at one end of the rotating member 601 passing through the furnace body 1. A rack 6032 is provided on the outer side of the gear 6031, and the rack 6032 is meshed with the gear 6031. A pushing part 6033 is provided at the end of the rack 6032, and the pushing part 6033 is connected to the top of the furnace body 1.

[0043] The pushing part 6033 includes an electric push rod, the telescopic end of the electric push rod is connected to the rack 6032, and the fixed end of the electric push rod is fixedly connected to the furnace body 1. The output end of the pushing part 6033 is extended to push the rack 6032 to move. During the movement of the rack 6032, the gear 6031 is driven to rotate. During the rotation of the gear 6031, the rotating member 601 is synchronously driven to rotate.

[0044] Reference Figure 10 to Figure 11 As shown, a connection block 10 is provided on the inner top of the furnace body 1 , and symmetrically distributed arc portions 11 are provided on the connection block 10 , and array-distributed adjustment portions 7 are provided on the arc portions 11 .

[0045] The adjusting portion 7 comprises a mounting groove 701 provided on the connecting block 10 , in which an arc block 702 is rotatably connected, and an adjusting member 703 is provided between the arc block 702 and the mounting groove 701 .

[0046] The adjusting member 703 includes a push rod, a fixed end of which is hinged to the mounting groove 701, and an output end of the push rod is hinged to the top of the arc block 702. When the adjusting member 703 is extended, the arc block 702 is deflected, and the airflow is guided during the deflection of the arc block 702.

[0047] Reference Figures 1 to 3 As shown, the transmission conveying device 4 includes rotating rollers 401, and the rotating rollers 401 are arranged in an array at the bottom of the furnace body 1. A sprocket 402 is provided at one end of the rotating rollers 401, and the sprocket 402 is located on the outside of the furnace body 1. The outsides of all the sprockets 402 are commonly connected with a chain belt 403, and the end of the chain belt 403 is transmission-connected with a driving part 404.

[0048] The driving unit 404 includes a driving motor, which drives the chain belt 403 to operate, and the chain belt 403 drives the sprocket wheel 402 to rotate. During the rotation of the sprocket wheel 402, the rotating roller 401 inside the furnace body 1 is synchronously driven to rotate.

[0049] Reference Figure 1 to Figure 2 As shown, the workpiece carrying device 8 includes a carrying member 801 , which is located above the rotating roller 401 , and a ventilation frame 802 distributed in an array is provided on the top of the carrying member 801 , and a workpiece is placed inside the ventilation frame 802 .

[0050] Reference Figure 1 As shown, the lifting drive device 3 includes support columns 301 symmetrically arranged on the top of the furnace body 1, and the tops of the two support columns 301 are commonly connected to a rotating rod 302, and a winding wheel 307 is symmetrically arranged on the rotating rod 302. The winding wheel 307 is provided with a traction member 308, and the end of the traction member 308 away from the winding wheel 307 is connected to the top of the furnace door 2.

[0051] The traction member 308 includes a traction wire rope, one end of which is connected to the winding wheel 307 , and the other end of which is connected to the top of the furnace door 2 .

[0052] During the forward rotation of the rotating rod 302 , the winding wheel 307 rotates synchronously, and the winding wheel 307 winds up the traction member 308 , and the traction member 308 drives the furnace door 2 to move upward along the limiting frame 12 .

[0053] During the reverse rotation of the rotating rod 302 , the winding wheel 307 rotates synchronously, and the winding wheel 307 unwinds the traction member 308 , and the traction member 308 drives the furnace door 2 to move downward along the limit frame 12 .

[0054] Reference Figure 1 As shown, the lifting drive device 3 also includes a transmission wheel 303, which is arranged in the middle of the rotating rod 302. A driving member 305 is provided on the top of the furnace body 1, and a driving wheel 304 is provided at the output end of the driving member 305. A transmission belt 306 is provided between the driving wheel 304 and the transmission wheel 303.

[0055] The driving member 305 includes a driving motor, which drives the driving wheel 304 to rotate. The driving wheel 304 drives the driving wheel 303 to rotate through the transmission belt 306. The driving wheel 303 drives the rotating rod 302 to rotate during the rotation. By controlling the driving member 305 to perform forward and reverse motion, the rotating rod 302 can be controlled to rotate forward and reverse.

[0056] A control terminal is disposed on the outside of the furnace body 1 , and a control system is disposed inside the control terminal. The control system is used to control all electrical components on the furnace body 1 .

[0057] The furnace body 1 is provided with array-distributed thermocouples inside, and the thermocouples are used to detect whether the temperature inside the furnace body 1 is unevenly distributed.

[0058] In the initial state, the lifting drive device 3 drives the furnace door 2 to rise to prevent the furnace door 2 from affecting the workpiece from entering the furnace body 1.

[0059] The air guide device 6 is in a normal state, and the air guide parts 602 distributed on both sides of the cooling branch pipe 504 are in a state of being parallel to each other (specifically, Fig.12 as shown).

[0060] A roller conveyor is provided on the outer side of the furnace body 1 , and in an initial state, the workpiece carrying device 8 is located above the roller conveyor.

[0061] When in use, the staff first places the workpiece to be heat-aged inside the ventilation frame 802 on the carrier 801. After the workpiece is placed, the roller conveyor is started, and the roller conveyor transports the carrier 801 toward the furnace body 1. During this process, the control system synchronously controls the start of the transmission conveyor device 4, and the carrier 801 is transported to the inside of the furnace body 1 under the joint action of the roller conveyor and the transmission conveyor device 4.

[0062] After the carrier 801 carrying the workpiece enters the furnace body 1, the control system is started and the following steps are performed: 1) Closing of the furnace door 2: The control system starts the lifting drive device 3, so that the furnace door 2 moves down steadily along the limit frame 12, gradually and completely blocking the feed port of the furnace body 1, and ensuring the airtightness of the furnace environment.

[0063] 2) Heating treatment: After the furnace door 2 is closed, the control system further activates the electric heating device inside the furnace body 1. The device then performs thermal aging treatment on the workpieces (mainly cast iron parts) in the furnace, aiming to improve the mechanical strength and heat resistance of the cast iron parts through the heating process and optimize their physical properties.

[0064] 3) Insulation stage: When the cast iron reaches the predetermined heating temperature and completes the required heating time, the control system automatically switches to insulation mode to keep the cast iron at a constant temperature for 4 to 8 hours (4-8H) to ensure the adequacy and uniformity of the thermal aging treatment.

[0065] 4) Cooling down the furnace: After the insulation stage, the control system controls the furnace to enter the cooling down stage, and blows cold air into the furnace body 1 through the gas supply device 5. The cold air displaces the hot air inside the furnace body 1, and the temperature inside the furnace is gradually reduced until the cast iron parts are cooled to a safe processing temperature, completing the entire heat treatment process.

[0066] During the furnace cooling process, the control system first activates the butterfly valve on the exhaust pipe 9, allowing the hot air in the furnace to be discharged through the exhaust pipe 9, and controls the solenoid valve on the gas main pipe 502 to open, ensuring that during the operation of the gas delivery component 501, the outside cold air can be smoothly introduced into the gas main pipe 502, so that the outside cold air can replace the hot air inside the furnace body 1.

[0067] During the furnace cooling stage, the gas delivery component 501 is started. The gas delivery component 501 includes a blower. The gas delivery component 501 draws cold air from the outside into the gas delivery main pipe 502. The gas delivery main pipe 502 distributes the cold air to both sides of the frame branch pipe 503. The cold air enters the interior of the furnace body 1 through the cooling branch pipes 504 distributed on both sides of the frame branch pipe 503. Since the cooling branch pipes 504 are located at the bottom of the furnace body 1, after the cold air enters the interior of the furnace body 1, the cold air begins to flow from bottom to top, and the cold air and the hot air in the furnace are efficiently replaced. As the replacement process proceeds, the cooled air is finally discharged smoothly from the exhaust pipe 9 at the top of the furnace body 1, thereby achieving effective cooling of the furnace body 1.

[0068] It should be noted that: a through pipe can be set on the outside of the exhaust pipe 9, and the through pipe is connected to another furnace body 1 (Note: at this time, the furnace body 1 is in a waiting state). When the replaced air is discharged from the exhaust pipe 9, a part of the gas will enter the inside of the other furnace body 1 through the through pipe to preheat the furnace body 1 and improve the working efficiency of the furnace body 1.

[0069] Reference Fig.12As shown, the interior of the furnace body 1 is divided into three areas, corresponding to the S1 area, the S2 area and the S3 area respectively. The control system can detect not only the temperature difference values ​​between the three areas, but also the temperature difference values ​​at the upper and lower ends of a single area through thermocouples, thereby controlling the air guide device of each interval to make corresponding state changes and adjust the temperature distribution inside the furnace body 1.

[0070] When the control system detects that the temperature difference between the three areas exceeds the set value, it indicates that the air volume distribution is unreasonable during the process of cooling the workpiece by the gas delivery device 5, resulting in differences in the air volume within the three areas, thereby affecting the temperature distribution of the furnace body 1.

[0071] When the control system detects that the air volume distribution inside the furnace body 1 is unreasonable, resulting in uneven temperature distribution of the furnace body 1, Fig.12 For example, assuming that the temperature difference between the S1 region and the S2 region exceeds the set value (the temperature inside the S1 region is higher than the temperature in the S2 region), the control system controls the air guide device 6 corresponding to the cooling branch pipe 504 located in the S2 region to be in the third working state (specifically, Figure 8 As shown in FIG. 1 ), the air guide device 6 guides the cold air blown by the cooling branch pipe 504 into the S2 area to the inside of the S1 area, so that the cold air received by the S1 area is greater than the normal amount, so that the temperature inside the S1 area gradually becomes stable with the temperature of the S2 area.

[0072] During the transition of the air guide device 6 from the normal state to the third working state, the rotating member 601 driven by the rotating part 603 is controlled to deflect in the direction of the S1 area. By controlling the extension and contraction amount of the pushing part 6033, the deflection angles of the two corresponding pushing parts 6033 can be controlled, so that the air guide device 6 is transformed from the normal state to the third working state. The air guide part 602 in the third working state guides the gas blown out from the cooling branch pipe 504.

[0073] It should be noted that: if the temperature drop rate of the S1 region is less than the threshold value, the air guide device 6 corresponding to the S2 region and the S3 region is controlled to be in the fourth working state (specifically, Fig. 9 As shown), at this time, the air guide portion 602 blocks the air outlet of the cooling branch pipe 504, thereby accelerating the airflow discharged from the cooling branch pipe 504 corresponding to the S1 area, and the cooling branch pipe 504 is able to fully cool the workpiece in the S1 area.

[0074] When the control system detects that the temperature difference between the top and bottom of the furnace body 1 exceeds the set value, it indicates that the cold air discharged from the cooling branch pipe 504 has excessive temperature loss in the process of moving from the top of the furnace body 1 to the top of the furnace body 1, resulting in excessive temperature difference between the top and bottom of the furnace body 1.

[0075] When the control system detects that the temperature difference between the top and bottom of the furnace body 1 exceeds the set range, it will automatically adjust the gas guide device 6 inside the furnace body 1 to the first working state (specifically, Figure 6 ). In the first working state, the air guide 602 is arranged on both sides of the cooling branch pipe 504, and together with the inner wall of the furnace body 1, forms a triangular frame. The main function of this triangular frame is to close the area in front of the cooling branch pipe 504, ensuring that the cold air released from the cooling branch pipe 504 can flow along the triangular frame to the top of the furnace body 1.

[0076] As the cold air moves upward, it contacts the arc-shaped portion 11 on the connecting block 10, and the arc-shaped portion 11 guides the cold air to flow from the top to the bottom of the furnace body 1, forming an airflow path from top to bottom. At the same time, the original bottom-up airflow in the furnace body 1 meets and collides with the newly guided airflow, which promotes the full mixing and contact of the gas inside the furnace body 1, thereby realizing the effective distribution of the cold air in the furnace body 1, and significantly improving the heat exchange efficiency inside the furnace body 1, thereby ensuring that the internal temperature of the furnace body 1 can drop steadily and evenly during the cooling process.

[0077] It should be noted that: by controlling the extension of the adjustment member 703, the deflection angle of the arc block 702 in the installation slot 701 can be adjusted, thereby guiding the airflow path of the cold air flowing from top to bottom.

[0078] When the control system detects that the temperature drop rate inside the furnace body 1 is less than the set value, it indicates that the temperature inside the furnace body 1 is too high. During the process of the cold air discharged from the cooling branch pipe 504 replacing the hot air inside the furnace body 1 with the cold air, the cold air and the hot air cannot fully contact each other, resulting in a slower rate of the cold and hot replacement operation.

[0079] When the control system detects that the temperature drop rate inside the furnace body 1 is slow, the control system adjusts the air guide device 6 inside the furnace body 1 to enter the second working state. In the second working state, the air guide parts 602 located on both sides of the cooling branch pipe 504 and the side walls of the furnace body 1 together form a triangular frame, but there is a gap at the tip of the triangular frame. The gap compresses the air exhausted from the cooling branch pipe 504, increases the air flow rate exhausted from the cooling branch pipe 504, and speeds up the air flow rate inside the furnace body 1, thereby improving the replacement efficiency of cold air and hot air.

[0080] When the air guide device 6 is in the second working state, the rotating part 601 is driven to rotate by controlling the rotating part 603, that is, the air guide parts 602 located on both sides of the same cooling branch pipe 504 are deflected in the same direction. During the deflection process, the air guide part 602 still forms a triangular frame with the furnace body 1, and there is a gap at the tip of the triangular frame. This is intended to control the air discharged from the cooling branch pipe 504 to flow irregularly inside the furnace body 1, so that the gas forms a turbulent flow inside the object, so that it is fully in contact with the workpiece inside the furnace body 1, thereby improving its heat exchange efficiency. At the same time, the existence of the turbulent flow further accelerates the rate at which hot air is discharged from the exhaust pipe 9.

[0081] It is worth noting that when the air guide device 6 is in the second working state, the control system controls the adjustment member 703 to drive the arc block 702 to rotate repeatedly inside the mounting groove 701. The arc block 702 forms an airflow from top to bottom during the reciprocating rotation, and at the same time disturbs the air on the top of the furnace body 1, further enhancing the replacement efficiency of cold and hot air inside the furnace body 1.

[0082] When the workpiece on the carrier 801 is an annular cylindrical workpiece, the air exhausted from the cooling branch pipe 504 directly contacts the outer wall of the annular cylindrical workpiece, so that there is a certain temperature difference between the inner circle and the outer circle of the annular cylindrical workpiece.

[0083] A thermocouple is installed on the carrier 801 to monitor the temperatures of the inner ring and the outer ring of the annular cylindrical workpiece. When the temperature difference between the inner ring and the outer ring of the annular cylindrical workpiece exceeds the set value, the control system controls the adjustment member 703 to push the arc block 702 to deflect, so that the end of the arc block 702 away from the mounting groove 701 contacts the top of the annular cylindrical workpiece. As the arc block 702 continues to deflect, the end of the arc block 702 away from the mounting groove 701 will push the annular cylindrical workpiece to synchronously deflect to a certain extent, that is, the bottom surface of the annular cylindrical workpiece will warp. At this time, the air discharged from the cooling branch pipe 504 can enter the inner ring of the annular cylindrical workpiece from the warped part of the annular cylindrical workpiece, and cool the inner ring part of the annular space to avoid excessive temperature difference between the inner and outer rings of the annular cylindrical workpiece, which will cause temperature stress changes in the annular cylindrical workpiece during the aging cooling process.

[0084] The present invention significantly optimizes the airflow path during the furnace cooling stage, and greatly improves the utilization efficiency of cold air by introducing a turbulence mechanism, thereby effectively shortening the cooling time. The specific implementation method is as follows: When the temperature difference between different areas in the furnace exceeds a preset range, the present invention can automatically adjust the state of the gas guide device 6 in the corresponding area to ensure uniform temperature distribution and achieve balanced temperature control.

[0085] If it is detected that the temperature difference between the top and the bottom of the furnace body 1 is too large, the air guide device 6 is adjusted to the first working state. In this state, the air guide part 602 and the inner wall of the furnace body 1 together form a triangular frame, guiding the cold air to flow upward along the frame, and guiding the cold air to flow back downward after contacting the top structure of the furnace body 1, forming an efficient up and down airflow circulation, effectively reducing the temperature difference between the top and the bottom.

[0086] In the case of a slow cooling rate, the air guide device 6 is switched to the second working state. In this state, the air guide portion 602 is deflected to form a specific triangular frame and a gap is created at its tip to compress the air discharged from the cooling branch pipe 504, increase the air flow rate and introduce more turbulence. These measures work together to significantly improve the replacement efficiency of cold air and hot air, thereby accelerating the cooling process of the furnace body 1.

[0087] For annular cylindrical workpieces, the present invention also designs a special processing mechanism, which monitors the temperature difference between the inner and outer rings of the workpiece. When the temperature difference exceeds the set value, the arc block 702 is used to push the workpiece to deflect to a certain extent, so that the bottom of the workpiece is tilted. This design allows the cold air discharged from the cooling branch pipe 504 to more easily enter the inner ring of the workpiece, effectively cooling the internal space, thereby avoiding the problem of temperature stress changes caused by excessive temperature difference between the inner and outer rings.

[0088] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0089] Although embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cooling pipe system for an aging treatment furnace for cast iron parts, comprising a furnace body (1), a limit frame (12) being provided at one end of the furnace body (1), a furnace door (2) being provided inside the limit frame (12), and characterized in that: The top of the furnace body (1) is provided with a lifting drive device (3) for driving the furnace door (2) to move up and down; An air delivery device (5) is provided at one end of the furnace body (1) away from the furnace door (2), an exhaust pipe (9) is provided at the top of the furnace body (1), and the exhaust pipe (9) and the air delivery device (5) together form an air flow channel from bottom to top; A transmission conveyor device (4) is provided inside the furnace body (1), and a workpiece carrying device (8) is provided above the transmission conveyor; The gas delivery device (5) comprises a gas delivery component (501), a gas delivery main pipe (502) being provided at a gas outlet end of the gas delivery component (501), a frame-shaped branch pipe (503) being provided at the end of the gas delivery main pipe (502), and cooling branch pipes (504) being arranged in an array on the frame-shaped branch pipe (503), the cooling branch pipes (504) being located at the bottom of the furnace body (1), and the cooling branch pipes (504) being distributed on both sides of the furnace body (1).

2. The cooling pipe system of the cast iron aging treatment furnace according to claim 1, characterized in that: The furnace body (1) is provided with symmetrically distributed support parts (13) inside, and the support parts (13) are provided with array-distributed gas guide devices (6); The air guide device (6) comprises a rotating member (601) symmetrically arranged on both sides of the cooling branch pipe (504), an air guide portion (602) is arranged on the outer side of the rotating member (601), and the air guide portion (602) is in contact with the bottom of the support portion (13); One end of the rotating member (601) extending out of the furnace body (1) is provided with a rotating portion (603), and the rotating portion (603) is used to drive the rotating member (601) to rotate.

3. The cooling pipeline system of the cast iron aging treatment furnace according to claim 2, characterized in that: The air guide portion (602) comprises a fixed portion (6021), the fixed portion (6021) being arranged on the outside of the rotating member (601), a movable portion (6022) being arranged inside the fixed portion (6021), and an elastic portion (6023) being arranged between the movable portion (6022) and the fixed portion (6021); A movable groove (6024) is provided at the bottom of the fixed portion (6021), and a fixed block (6025) is provided at the bottom of the movable portion (6022), wherein the fixed block (6025) is slidably connected to the movable groove (6024).

4. The cooling pipe system of the cast iron aging treatment furnace according to claim 2, characterized in that: The rotating part (603) comprises a gear (6031), the gear (6031) being arranged at one end of the rotating member (601) passing through the furnace body (1), a rack (6032) being arranged on the outer side of the gear (6031), the rack (6032) being meshed with the gear (6031), a pushing part (6033) being arranged at the end of the rack (6032), and the pushing part (6033) being connected to the top of the furnace body (1).

5. The cooling pipeline system of the cast iron aging treatment furnace according to claim 1, characterized in that: The inner top of the furnace body (1) is provided with a connection block (10), the connection block (10) is provided with symmetrically distributed arc-shaped portions (11), and the arc-shaped portions (11) are provided with array-distributed adjustment portions (7); The adjusting portion (7) comprises a mounting groove (701) provided on the connecting block (10), an arc-shaped block (702) being rotatably connected in the mounting groove (701), and an adjusting member (703) being provided between the arc-shaped block (702) and the mounting groove (701).

6. The cooling pipeline system of the cast iron aging treatment furnace according to claim 1, characterized in that: The transmission conveying device (4) comprises rotating rollers (401), the rotating rollers (401) are arranged in an array at the bottom of the furnace body (1), a sprocket (402) is provided at one end of the rotating rollers (401), the sprocket (402) is located outside the furnace body (1), the outer sides of all the sprockets (402) are connected to a chain belt (403), and the end of the chain belt (403) is transmission-connected to a driving unit (404).

7. The cooling pipeline system of the cast iron aging treatment furnace according to claim 1, characterized in that: The workpiece bearing device (8) comprises a bearing member (801), the bearing member (801) being located above the rotating roller (401), the top of the bearing member (801) being provided with a ventilation frame (802) distributed in an array, and the workpiece is placed inside the ventilation frame (802).

8. The cooling pipeline system of the cast iron aging treatment furnace according to claim 1, characterized in that: The lifting drive device (3) comprises support columns (301) symmetrically arranged on the top of the furnace body (1), the tops of the two support columns (301) being commonly connected to a rotating rod (302), the rotating rods (302) being symmetrically provided with winding wheels (307), the winding wheels (307) being provided with a traction member (308), and the end of the traction member (308) away from the winding wheels (307) being connected to the top of the furnace door (2).

9. The cooling pipeline system of the cast iron aging treatment furnace according to claim 1, characterized in that: The lifting drive device (3) further comprises a transmission wheel (303), wherein the transmission wheel (303) is arranged in the middle of the rotating rod (302), a driving member (305) is arranged on the top of the furnace body (1), a driving wheel (304) is arranged at the output end of the driving member (305), and a transmission belt (306) is arranged between the driving wheel (304) and the transmission wheel (303).

Images