Roller hearth furnace with automatic feeding and discharging functions

Abstract

The utility model discloses an automatic feeding and discharging roller hearth furnace which comprises a furnace body, a main roller way device, a front end roller way, a rear end roller way, a feeding conveying device, a discharging conveying device, a first transfer mechanism and a discharging transfer device. Wherein the feeding conveying device is used for conveying steel pipes to move to the position above the first transferring mechanism, and the first transferring mechanism is used for upwards supporting the steel pipes on the feeding conveying device and conveying the steel pipes to the front-end roller way; the front-end roller way is connected with one end of the main roller way device and used for conveying a steel pipe to the main roller way device, and the main roller way device penetrates through the furnace body and used for conveying the steel pipe to penetrate through the furnace body. And the rear end roller way is connected with the other end part of the main roller way device and is used for bearing the steel pipe on the main roller way device. The automatic feeding and discharging device can realize automatic feeding and automatic discharging of the steel pipes in the roller hearth furnace, and is more convenient to use.

Description

Technical Field

[0001] This utility model relates to an automatic loading and unloading roller hearth furnace. Background Technology

[0002] Currently, roller hearth furnaces are used to heat treat steel pipes during the steel pipe production process. A roller hearth furnace consists of a furnace body and roller conveyors. The roller conveyors are used to transport steel pipes through the furnace body, where the steel pipes are heated, kept warm, and cooled for heat treatment. For example, Chinese patent CN220224254U discloses a heat treatment roller hearth furnace. However, this heat treatment roller hearth furnace cannot achieve automatic feeding and unloading of steel pipes, making it inconvenient to use. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide an automatic loading and unloading roller hearth furnace, which can realize the automatic loading and unloading of steel pipes in the roller hearth furnace, making it more convenient to use.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: an automatic loading and unloading roller hearth furnace, including a furnace body, a main roller conveyor device, a front roller conveyor, a rear roller conveyor, a loading conveyor device, an unloading conveyor device, a first transfer mechanism, and an unloading transfer device.

[0005] The feeding and conveying device is used to move the steel pipe above the first transfer mechanism;

[0006] The first transfer mechanism is used to lift the steel pipe on the feeding conveyor upward and transport the steel pipe to the front roller conveyor;

[0007] The front roller conveyor is connected to one end of the main roller conveyor device and is used to transport the steel pipe onto the main roller conveyor device.

[0008] The main roller conveyor passes through the furnace body and is used to convey steel pipes through the furnace body;

[0009] The rear roller conveyor is connected to the other end of the main roller conveyor and is used to receive the steel pipe on the main roller conveyor.

[0010] The unloading and transfer device is used to lift the steel pipe on the rear roller conveyor upward and transport the steel pipe to the unloading and conveying device;

[0011] The material conveying device is used to receive and convey the steel pipe.

[0012] Furthermore, the feeding and transfer device includes a transition roller conveyor, a second transfer mechanism, and a third transfer mechanism;

[0013] The transition roller conveyor is equipped with a receiving station and a discharging station. The transition roller conveyor is used to transport the steel pipe in the receiving station to the discharging station.

[0014] The second transfer mechanism is used to lift the steel pipe on the rear roller conveyor upward and transport the steel pipe to the receiving station on the transition roller conveyor;

[0015] The third transfer mechanism is used to lift the steel pipe in the unloading station on the transition roller conveyor and transport the steel pipe to the unloading conveyor.

[0016] Furthermore, the first transfer mechanism includes a first frame, a first drive assembly, a first lifting assembly, and at least two first conveying assemblies arranged in parallel;

[0017] The first conveying assembly is slidably connected to the first frame in the vertical direction;

[0018] The first drive assembly is connected to the first conveying assembly and is used to drive the first conveying assembly to move the lifted steel pipe to above the front roller conveyor.

[0019] The first lifting assembly is connected to the first frame and connected to the first conveying assembly. The first lifting assembly is used to drive the first conveying assembly to rise up to lift the steel pipe on the feeding conveying device and to drive the first conveying assembly to fall down so that the steel pipe falls on the front roller conveyor.

[0020] The second transfer mechanism includes a second frame, a second drive assembly, a second lifting assembly, and at least two second conveying assemblies arranged in parallel.

[0021] The second conveying assembly is slidably connected to the second frame in the vertical direction;

[0022] The second drive assembly is connected to the second conveying assembly and is used to drive the second conveying assembly to move the lifted steel pipe above the transition roller conveyor.

[0023] The second lifting assembly is connected to the second frame and connected to the second conveying assembly. The second lifting assembly is used to drive the second conveying assembly to rise up to lift the steel pipe on the rear roller conveyor and to drive the second conveying assembly to fall down so that the steel pipe falls onto the receiving station in the transition roller conveyor.

[0024] The third transfer mechanism includes a third frame, a third drive assembly, a third lifting assembly, and at least two third conveying assemblies arranged in parallel.

[0025] The third conveying assembly is slidably connected to the third frame in the vertical direction;

[0026] The third drive component is connected to the third conveying component and is used to drive the third conveying component to move the lifted steel pipe to above the unloading conveying device.

[0027] The third lifting assembly is connected to the third frame and to the third conveying assembly. The third lifting assembly is used to drive the third conveying assembly to rise up to lift the steel pipe in the unloading station on the transition roller conveyor and to drive the third conveying assembly to fall down so that the steel pipe falls onto the unloading conveying device.

[0028] Furthermore, the front roller conveyor is provided with a first groove corresponding to the first conveying component. When the first lifting component drives the first conveying component to descend, one end of the first conveying component descends into the first groove.

[0029] The rear roller conveyor is provided with a second groove corresponding to the second conveying component, and the transition roller conveyor is provided with a third groove corresponding to the second conveying component. When the second lifting component drives the second conveying component to descend, one end of the second conveying component descends into the second groove and the other end of the second conveying component descends into the third groove.

[0030] The transition roller conveyor is provided with a fourth groove corresponding to the third conveying component. When the third lifting component drives the third conveying component to descend, one end of the third conveying component descends into the fourth groove.

[0031] Furthermore, the first conveying assembly includes a first conveying frame, a first driving wheel, a first driven wheel, and a first conveying chain;

[0032] The first conveyor frame is slidably connected to the first frame in the vertical direction;

[0033] The first driving wheel and the first driven wheel are respectively rotatably connected to the first conveyor frame;

[0034] The first conveyor chain is connected to the first driving wheel and the first driven wheel, and the steel pipe is used to support the first conveyor chain;

[0035] The first drive assembly is connected to the first drive wheel and is used to drive the first drive wheel to rotate, thereby driving the first conveyor chain to move and convey the steel pipe.

[0036] The first lifting assembly is connected to the first frame and connected to the first conveyor frame. The first lifting assembly is used to drive the first conveyor frame to rise and thereby drive the first conveyor chain to rise to lift the steel pipe on the feeding conveyor device. The first lifting assembly is also used to drive the first conveyor frame to fall and thereby drive the first conveyor chain to fall so that the steel pipe falls on the front roller conveyor.

[0037] The second conveying assembly includes a second conveyor frame, a second drive wheel, a second driven wheel, and a second conveying chain;

[0038] The second conveyor frame is slidably connected to the second frame in the vertical direction;

[0039] The second driving wheel and the second driven wheel are rotatably connected to the second conveyor frame, respectively;

[0040] The second conveyor chain is connected to the second driving wheel and the second driven wheel, and the steel pipe is used to support the second conveyor chain;

[0041] The second drive assembly is connected to the second drive wheel and is used to drive the second drive wheel to rotate, thereby driving the second conveyor chain to move the steel pipe.

[0042] The second lifting assembly is connected to the second frame and connected to the second conveyor frame. The second lifting assembly is used to drive the second conveyor frame to rise and thereby drive the second conveyor chain to rise to lift the steel pipe on the rear roller conveyor. The second lifting assembly is also used to drive the second conveyor frame to fall and thereby drive the second conveyor chain to fall so that the steel pipe falls on the transition roller conveyor.

[0043] The third conveying assembly includes a third conveying frame, a third driving wheel, a third driven wheel, and a third conveying chain;

[0044] The third conveyor frame is slidably connected to the third frame in the vertical direction;

[0045] The third driving wheel and the third driven wheel are respectively rotatably connected to the third conveyor frame;

[0046] The third conveyor chain is connected to the third driving wheel and the third driven wheel, and the steel pipe is used to support the third conveyor chain;

[0047] The third drive assembly is connected to the third drive wheel and is used to drive the third drive wheel to rotate, thereby driving the third conveyor chain to move the steel pipe.

[0048] The third lifting assembly is connected to the third frame and the third conveyor frame. The third lifting assembly is used to drive the third conveyor frame to rise, thereby driving the third conveyor chain to rise to lift the steel pipe on the transition roller table. The third lifting assembly is also used to drive the third conveyor frame to fall, thereby driving the third conveyor chain to fall so that the steel pipe falls onto the unloading conveyor device.

[0049] Furthermore, the first drive assembly includes a first drive shaft and a first motor; wherein, the first drive shaft is connected to the first drive wheel, the first motor is connected to one of the first conveyor frames, the first motor is connected to the first drive shaft and is used to drive the first drive shaft to rotate, thereby driving the first drive wheel to rotate, thereby driving the first conveyor chain to move to convey the steel pipe.

[0050] The second drive assembly includes a second drive shaft and a second motor; wherein the second drive shaft is connected to the second drive wheel, the second motor is connected to one of the second conveyor frames, the second motor is connected to the second drive shaft and is used to drive the second drive shaft to rotate, thereby driving the second drive wheel to rotate, thereby driving the second conveyor chain to move to convey the steel pipe.

[0051] The third drive assembly includes a third drive shaft and a third motor; wherein, the third drive shaft is connected to the third drive wheel, the third motor is connected to one of the third conveyor frames, the third motor is connected to the third drive shaft and is used to drive the third drive shaft to rotate, thereby driving the third drive wheel to rotate, thereby driving the third conveyor chain to move to convey the steel pipe.

[0052] Furthermore, the first lifting assembly includes a first rotating shaft, a first power component, a first front swing arm, a first rear swing arm, a first front support roller, a first rear support roller, a first front transmission arm, a first rear transmission arm, and a first connecting rod.

[0053] Among them, the first front swing arm, the first rear swing arm, the first front support roller, the first rear support roller, the first front transmission arm, the first rear transmission arm, and the first connecting rod correspond one-to-one with the first conveyor frame;

[0054] The first rotating shaft is rotatably connected to the first frame;

[0055] One end of the first front swing arm is connected to the first rotating shaft, and the first front support roller is rotatably connected to the other end of the corresponding first front swing arm and abuts upward against the front end of the corresponding first conveyor frame.

[0056] One end of the first rear swing arm is rotatably connected to the first frame, and the first rear support roller is rotatably connected to the other end of the corresponding first rear swing arm and abuts upward against the rear end of the corresponding first conveyor frame;

[0057] One end of the first front drive arm is connected to the corresponding first front swing arm, one end of the first rear drive arm is connected to the corresponding first rear swing arm, one end of the first connecting rod is hinged to the other end of the corresponding first front drive arm, and the other end of the first connecting rod is hinged to the other end of the corresponding first rear drive arm.

[0058] The first power component is connected to the first rotating shaft and is used to drive the first rotating shaft to rotate;

[0059] The second lifting assembly includes a second rotating shaft, a second power component, a second front swing arm, a second rear swing arm, a second front support roller, a second rear support roller, a second front transmission arm, a second rear transmission arm, and a second connecting rod;

[0060] Among them, the second front swing arm, the second rear swing arm, the second front support roller, the second rear support roller, the second front drive arm, the second rear drive arm, and the second connecting rod correspond one-to-one with the second conveyor frame;

[0061] The second shaft is rotatably connected to the second frame;

[0062] One end of the second front swing arm is connected to the second rotating shaft, and the second front support roller is rotatably connected to the other end of the corresponding second front swing arm and abuts upward against the front end of the corresponding second conveyor frame;

[0063] One end of the second rear swing arm is rotatably connected to the second frame, and the second rear support roller is rotatably connected to the other end of the corresponding second rear swing arm and abuts upward against the rear end of the corresponding second conveyor frame;

[0064] One end of the second front drive arm is connected to the corresponding second front swing arm, one end of the second rear drive arm is connected to the corresponding second rear swing arm, one end of the second link is hinged to the other end of the corresponding second front drive arm, and the other end of the second link is hinged to the other end of the corresponding second rear drive arm.

[0065] The second power component is connected to the second rotating shaft and is used to drive the second rotating shaft to rotate;

[0066] The third lifting assembly includes a third rotating shaft, a third power component, a third front swing arm, a third rear swing arm, a third front support roller, a third rear support roller, a third front transmission arm, a third rear transmission arm, and a third connecting rod.

[0067] Among them, the third front swing arm, the third rear swing arm, the third front support roller, the third rear support roller, the third front transmission arm, the third rear transmission arm, and the third connecting rod correspond one-to-one with the third conveyor frame;

[0068] The third rotating shaft is rotatably connected to the third frame;

[0069] One end of the third front swing arm is connected to the third rotating shaft, and the third front support roller is rotatably connected to the other end of the corresponding third front swing arm and abuts upward against the front end of the corresponding third conveyor frame.

[0070] One end of the third rear swing arm is rotatably connected to the third frame, and the third rear support roller is rotatably connected to the other end of the corresponding third rear swing arm and abuts upward against the rear end of the corresponding third conveyor frame;

[0071] One end of the third front drive arm is connected to the corresponding third front swing arm, one end of the third rear drive arm is connected to the corresponding third rear swing arm, one end of the third link is hinged to the other end of the corresponding third front drive arm, and the other end of the third link is hinged to the other end of the corresponding third rear drive arm.

[0072] The third power component is connected to the third rotating shaft and is used to drive the third rotating shaft to rotate.

[0073] Furthermore, the first power component includes a first telescopic drive member and a first drive arm;

[0074] One end of the first drive arm is connected to the first rotating shaft;

[0075] One end of the first telescopic drive member is hinged to the first frame, and the other end of the first telescopic drive member is hinged to the other end of the first drive arm. The first telescopic drive member is used to drive the first drive arm to swing, thereby driving the first rotating shaft to rotate.

[0076] The second power component includes a second telescopic drive member and a second drive arm;

[0077] One end of the second drive arm is connected to the second rotating shaft;

[0078] One end of the second telescopic drive member is hinged to the second frame, and the other end of the second telescopic drive member is hinged to the other end of the second drive arm. The second telescopic drive member is used to drive the second drive arm to swing, thereby driving the second rotating shaft to rotate.

[0079] The third power component includes a third telescopic drive element and a third drive arm;

[0080] One end of the third drive arm is connected to the third rotating shaft;

[0081] One end of the third telescopic drive member is hinged to the third frame, and the other end of the third telescopic drive member is hinged to the other end of the third drive arm. The third telescopic drive member is used to drive the third drive arm to swing, thereby driving the third rotating shaft to rotate.

[0082] Furthermore, the main roller conveyor device includes an inlet roller conveyor, an inlet roller conveyor, and an outlet roller conveyor;

[0083] The furnace body has an inlet and an outlet;

[0084] The inner roller conveyor is located on the inner side of the furnace body.

[0085] The furnace feed roller conveyor is located on the outside of the furnace body and on one side of the furnace inlet;

[0086] The furnace discharge roller conveyor is located on the outside of the furnace body and on one side of the furnace body's outlet;

[0087] The furnace inlet roller conveyor, the furnace inlet roller conveyor, and the furnace outlet roller conveyor are connected in sequence.

[0088] The front roller conveyor is connected to the furnace inlet roller conveyor, and the rear roller conveyor is connected to the furnace outlet roller conveyor.

[0089] Furthermore, the automatic loading and unloading roller hearth furnace also includes in-furnace sensors, external furnace sensors, and a controller;

[0090] The furnace body is also equipped with a door device at its inlet;

[0091] The furnace body is divided into a sealing section, a heating section and a slow cooling section from the inlet to the outlet.

[0092] The in-furnace sensor is used to detect whether there is a steel pipe in the sealed section inside the furnace body and to send the detection signal to the controller;

[0093] The external furnace sensor is used to detect whether there is a steel pipe on the furnace feed roller conveyor and to send the detection signal to the controller;

[0094] The controller is connected to the door device and is used to control the door device to open when the in-furnace sensor does not detect the steel pipe and the out-of-furnace sensor detects the steel pipe.

[0095] After adopting the above technical solution, the feeding conveyor first transports the steel pipe to the top of the first transfer mechanism. The first transfer mechanism lifts the steel pipe from the feeding conveyor and transports it to the front roller conveyor. The front roller conveyor then transports the steel pipe to the main roller conveyor, thus completing the automatic feeding of the steel pipe. The main roller conveyor then transports the steel pipe through the furnace body, where heat treatment can be completed. The main roller conveyor then transports the steel pipe to the rear roller conveyor. The unloading transfer device then lifts the steel pipe from the rear roller conveyor and transports it to the unloading conveyor. The unloading conveyor then transports the steel pipe to the subsequent process, thus completing the automatic unloading of the steel pipe, making it more convenient to use. Attached Figure Description

[0096] Figure 1 This is a schematic diagram of the automatic loading and unloading roller hearth furnace of this utility model.

[0097] Figure 2 for Figure 1 Detailed view of part A in the middle;

[0098] Figure 3 for Figure 1 Detailed view of section B in the middle;

[0099] Figure 4 This is a front view of the front roller conveyor, the feeding conveyor device, and the first transfer mechanism of this utility model;

[0100] Figure 5 This is a left view of the front roller conveyor, the feeding conveyor, and the first transfer mechanism of this utility model;

[0101] Figure 6 This is a left view of the first transfer mechanism of this utility model;

[0102] Figure 7 This is a perspective view of the first transfer mechanism of this utility model;

[0103] In the diagram: 1. Furnace body; 2. Main roller conveyor device; 3. Front roller conveyor; 4. Rear roller conveyor; 5. Feeding conveyor; 6. Discharging conveyor; 7. First transfer mechanism; 8. Steel pipe; 9. Transition roller conveyor; 10. Second transfer mechanism; 11. Third transfer mechanism; 12. First frame; 13. First conveying assembly; 14. First groove; 15. First conveyor frame; 16. First drive shaft; 17. First motor; 18. First rotating shaft; 19. First... 20. Front swing arm; 21. First rear swing arm; 22. First front support roller; 23. First rear support roller; 24. First front drive arm; 25. First connecting rod; 26. First telescopic drive component; 27. First drive arm; 28. Furnace inlet roller conveyor; 29. ​​Furnace inlet roller conveyor; 30. Furnace outlet roller conveyor; 31. Chimney; 32. Exhaust gas fan; 33. Combustion fan; 34. RX gas generator; 35. Gas analyzer; 36. Protective gas valve station. Detailed Implementation

[0104] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0105] like Figures 1-7 As shown, an automatic loading and unloading roller hearth furnace includes a furnace body 1, a main roller conveyor device 2, a front roller conveyor 3, a rear roller conveyor 4, a loading conveyor device 5, an unloading conveyor device 6, a first transfer mechanism 7, and an unloading transfer device.

[0106] The feeding conveyor 5 is used to move the steel pipe 8 above the first transfer mechanism 7;

[0107] The first transfer mechanism 7 is used to lift the steel pipe 8 on the feeding conveyor 5 upward and transport the steel pipe 8 to the front roller conveyor 3;

[0108] The front roller conveyor 3 is connected to one end of the main roller conveyor device 2 and is used to transport the steel pipe 8 onto the main roller conveyor device 2.

[0109] The main roller conveyor 2 passes through the furnace body 1 and is used to convey the steel pipe 8 through the furnace body 1;

[0110] The rear roller conveyor 4 is connected to the other end of the main roller conveyor device 2 and is used to receive the steel pipe 8 on the main roller conveyor device 2.

[0111] The unloading and transfer device is used to lift the steel pipe 8 on the rear roller conveyor 4 and transport the steel pipe 8 to the unloading and conveying device 6.

[0112] The unloading conveyor 6 is used to receive and transport the steel pipe 8. Specifically, firstly, the loading conveyor 5 transports the steel pipe 8 above the first transfer mechanism 7. The first transfer mechanism 7 lifts the steel pipe 8 from the loading conveyor 5 and then transports the steel pipe 8 to the front roller conveyor 3. The front roller conveyor 3 then transports the steel pipe 8 to the main roller conveyor 2, thus completing the automatic loading of the steel pipe 8. Then, the main roller conveyor 2 transports the steel pipe 8 through the furnace body 1, where the heat treatment of the steel pipe 8 can be completed. Then, the main roller conveyor 2 transports the steel pipe 8 to the rear roller conveyor 4. Then, the unloading transfer device lifts the steel pipe 8 from the rear roller conveyor 4 and transports it to the unloading conveyor 6. Then, the unloading conveyor 6 transports the steel pipe 8 to the subsequent process, thus completing the automatic unloading of the steel pipe 8, making it more convenient to use.

[0113] like Figure 1 , 2 As shown, the material transfer device may include a transition roller conveyor 9, a second transfer mechanism 10, and a third transfer mechanism 11;

[0114] The transition roller conveyor 9 is provided with a receiving station and a discharging station. The transition roller conveyor 9 is used to transport the steel pipe 8 in the receiving station to the discharging station.

[0115] The second transfer mechanism 10 is used to lift the steel pipe 8 on the rear roller conveyor 4 upward and transport the steel pipe 8 to the receiving station on the transition roller conveyor 9;

[0116] The third transfer mechanism 11 is used to lift the steel pipe 8 in the unloading station on the transition roller conveyor 9 and transport the steel pipe 8 to the unloading conveyor device 6. Specifically, after the main roller conveyor device 2 transports the steel pipe 8 to the rear roller conveyor 4, the second transfer mechanism 10 can lift the steel pipe 8 on the rear roller conveyor 4 and transport the steel pipe 8 to the receiving station on the transition roller conveyor 9. The transition roller conveyor 9 can transport the steel pipe 8 in the receiving station to the unloading station. Then, the third transfer mechanism 11 lifts the steel pipe 8 in the unloading station on the transition roller conveyor 9 and transports the steel pipe 8 to the unloading conveyor device 6, thereby completing the automatic unloading of the steel pipe 8.

[0117] like Figures 1-7 As shown, the first transfer mechanism 7 may include a first frame 12, a first drive assembly, a first lifting assembly, and at least two first conveying assemblies 13 arranged in parallel.

[0118] The first conveying assembly 13 is slidably connected to the first frame 12 in the vertical direction;

[0119] The first drive assembly is connected to the first conveying assembly 13 and is used to drive the first conveying assembly 13 to move the lifted steel pipe 8 to above the front roller conveyor 3.

[0120] The first lifting assembly is connected to the first frame 12 and to the first conveying assembly 13. The first lifting assembly is used to drive the first conveying assembly 13 to rise to lift the steel pipe 8 on the feeding conveying device 5 and to drive the first conveying assembly 13 to fall onto the front roller conveyor 3. Specifically, after the feeding conveying device 5 conveys the steel pipe 8 above the first transfer mechanism 7, the first lifting assembly in the first transfer mechanism 7 drives the first conveying assembly 13 to rise to lift the steel pipe 8 on the feeding conveying device 5. Then, the first driving assembly drives the first conveying assembly 13 to move the lifted steel pipe 8 to the front roller conveyor 3. Then, the first lifting assembly drives the first conveying assembly 13 to fall onto the front roller conveyor 3.

[0121] The second transfer mechanism 10 may include a second frame, a second drive assembly, a second lifting assembly, and at least two second conveying assemblies arranged in parallel.

[0122] The second conveying assembly is slidably connected to the second frame in the vertical direction;

[0123] The second drive assembly is connected to the second conveying assembly and is used to drive the second conveying assembly to move the lifted steel pipe 8 above the transition roller conveyor 9;

[0124] The second lifting assembly is connected to the second frame and to the second conveying assembly. The second lifting assembly is used to drive the second conveying assembly to rise up to lift the steel pipe 8 on the rear roller conveyor 4 and to drive the second conveying assembly to fall down so that the steel pipe 8 falls on the receiving station in the transition roller conveyor 9. Specifically, after the main roller conveyor device 2 conveys the steel pipe 8 to the rear roller conveyor 4, the second lifting assembly in the second transfer mechanism 10 drives the second conveying assembly to rise up to lift the steel pipe 8 on the rear roller conveyor 4. Then, the second driving assembly drives the second conveying assembly to move the lifted steel pipe 8 to above the transition roller conveyor 9. Then, the second lifting assembly drives the second conveying assembly to fall down so that the steel pipe 8 falls on the receiving station in the transition roller conveyor 9.

[0125] The third transfer mechanism 11 may include a third frame, a third drive assembly, a third lifting assembly, and at least two third conveying assemblies arranged in parallel.

[0126] The third conveying assembly is slidably connected to the third frame in the vertical direction;

[0127] The third drive assembly is connected to the third conveying assembly and is used to drive the third conveying assembly to move the lifted steel pipe 8 above the unloading conveying device 6.

[0128] The third lifting assembly is connected to the third frame and the third conveying assembly. The third lifting assembly drives the third conveying assembly to rise and lift the steel pipe 8 in the unloading station on the transition roller conveyor 9, and also drives the third conveying assembly to descend so that the steel pipe 8 falls onto the unloading conveying device 6. Specifically, after the transition roller conveyor 9 conveys the steel pipe 8 from the receiving station to the unloading station, the third lifting assembly in the third transfer mechanism 11 drives the third conveying assembly to rise and lift the steel pipe 8 in the unloading station on the transition roller conveyor 9. Then, the third driving assembly drives the third conveying assembly to move the lifted steel pipe 8 above the unloading conveying device 6. Finally, the third lifting assembly drives the third conveying assembly to descend so that the steel pipe 8 falls onto the unloading conveying device 6.

[0129] In this embodiment, the first frame 12, the second frame and the third frame each include a plurality of frames fixedly connected to the ground.

[0130] like Figure 3 , 4 As shown, the front roller conveyor 3 is provided with a first groove 14 corresponding to the first conveying component 13. When the first lifting component drives the first conveying component 13 to descend, one end of the first conveying component 13 descends into the first groove 14. Specifically, when the first conveying component 13 is driven to descend, the first conveying component 13 is lower than the feeding conveying device 5. Therefore, the feeding conveying device 5 can convey the steel pipe 8 to the top of the first conveying component 13. Then, when the first lifting component drives the first conveying component 13 to rise, it can lift the steel pipe 8 on the feeding conveying device 5. Then, the first conveying component 13 conveys the lifted steel pipe 8 to the top of the front roller conveyor 3. Then, when the first lifting component drives the first conveying component 13 to descend, one end of the first conveying component 13 descends into the first groove 14, so that the steel pipe 8 on the first conveying component 13 can fall onto the front roller conveyor 3.

[0131] The rear roller conveyor 4 is provided with a second groove corresponding to the second conveying component, and the transition roller conveyor 9 is provided with a third groove corresponding to the second conveying component. When the second lifting component drives the second conveying component to descend, one end of the second conveying component descends into the second groove and the other end of the second conveying component descends into the third groove. Specifically, when the second conveying component is driven to descend, one end of the second conveying component descends into the second groove. Therefore, when the main roller conveyor device 2 conveys the steel pipe 8 onto the rear roller conveyor 4, the steel pipe 8 is located above the second conveying component. Then, when the second lifting component drives the second conveying component to rise, it can lift the steel pipe 8 on the rear roller conveyor 4. Then, the second conveying component conveys the lifted steel pipe 8 to the top of the transition roller conveyor 9. Then, the second lifting component drives the second conveying component to descend so that the other end of the second conveying component descends into the third groove, thereby allowing the steel pipe 8 on the second conveying component to fall into the receiving station on the transition roller conveyor 9.

[0132] The transition roller conveyor 9 is provided with a fourth groove corresponding to each of the third conveying components. When the third lifting component drives the third conveying component to descend, one end of the third conveying component descends into the fourth groove. Specifically, when the third conveying component is driven to descend, one end of the third conveying component descends into the fourth groove. Therefore, when the transition roller conveyor 9 conveys the steel pipe 8 from the receiving station to the unloading station, the steel pipe 8 is located above the third conveying component. Then, when the third lifting component drives the third conveying component to rise, it can lift the steel pipe 8 in the unloading station. Then, the third conveying component conveys the lifted steel pipe 8 to the top of the unloading conveying device 6. Then, the third lifting component drives the third conveying component to descend so that the steel pipe 8 on the third conveying component can fall onto the unloading conveying device 6.

[0133] In this embodiment, both the loading conveyor 5 and the unloading conveyor 6 are chain conveyors. Each of the loading conveyor 5 and the unloading conveyor 6 has multiple chain conveyor components arranged in parallel. The first conveyor component 13 is staggered and partially overlaps with the chain conveyor components in the loading conveyor 5, and the third conveyor component is staggered and partially overlaps with the chain conveyor components in the unloading conveyor 6. The chain conveyor is also called a transverse conveyor chain, and its specific structure is well-known to those skilled in the art.

[0134] like Figure 6 , 7 As shown, the first conveying assembly 13 may include a first conveying frame 15, a first driving wheel, a first driven wheel, and a first conveying chain;

[0135] The first conveyor frame 15 is slidably connected to the first frame 12 in the vertical direction;

[0136] The first driving wheel and the first driven wheel are rotatably connected to the first conveyor frame 15, respectively.

[0137] The first conveyor chain is connected to the first driving wheel and the first driven wheel, and the steel pipe 8 is used to support the first conveyor chain;

[0138] The first drive assembly is connected to the first drive wheel and is used to drive the first drive wheel to rotate, thereby driving the first conveyor chain to move and convey the steel pipe 8.

[0139] The first lifting assembly is connected to the first frame 12 and connected to the first conveyor frame 15. The first lifting assembly is used to drive the first conveyor frame 15 to rise, thereby driving the first conveyor chain to rise and lift the steel pipe 8 on the feeding conveyor device 5. The first lifting assembly is also used to drive the first conveyor frame 15 to fall, thereby driving the first conveyor chain to fall so that the steel pipe 8 falls on the front roller conveyor 3. In this embodiment, the first driving assembly is connected to each of the first drive wheels, and the first lifting assembly is also connected to each of the first conveyor frames 15.

[0140] The second conveying assembly may include a second conveyor frame, a second drive wheel, a second driven wheel, and a second conveying chain;

[0141] The second conveyor frame is slidably connected to the second frame in the vertical direction;

[0142] The second driving wheel and the second driven wheel are rotatably connected to the second conveyor frame, respectively;

[0143] The second conveyor chain is connected to the second driving wheel and the second driven wheel, and the steel pipe 8 is used to support the second conveyor chain;

[0144] The second drive assembly is connected to the second drive wheel and is used to drive the second drive wheel to rotate, thereby driving the second conveyor chain to move the steel pipe 8.

[0145] The second lifting assembly is connected to the second frame and to the second conveyor frame. The second lifting assembly is used to drive the second conveyor frame to rise, thereby driving the second conveyor chain to rise to support the steel pipe 8 on the rear roller conveyor 4. The second lifting assembly is also used to drive the second conveyor frame to fall, thereby driving the second conveyor chain to fall so that the steel pipe 8 falls onto the transition roller conveyor 9. In this embodiment, the second drive assembly is connected to each of the second drive wheels, and the second lifting assembly is also connected to each of the second conveyor frames.

[0146] The third conveying assembly may include a third conveying frame, a third driving wheel, a third driven wheel, and a third conveying chain;

[0147] The third conveyor frame is slidably connected to the third frame in the vertical direction;

[0148] The third driving wheel and the third driven wheel are respectively rotatably connected to the third conveyor frame;

[0149] The third conveyor chain is connected to the third driving wheel and the third driven wheel, and the steel pipe 8 is used to support the third conveyor chain;

[0150] The third drive assembly is connected to the third drive wheel and is used to drive the third drive wheel to rotate, thereby driving the third conveyor chain to move the steel pipe 8.

[0151] The third lifting assembly is connected to the third frame and the third conveyor frame. The third lifting assembly drives the third conveyor frame to rise, thereby raising the third conveyor chain to lift the steel pipe 8 on the transition roller conveyor 9. The third lifting assembly also drives the third conveyor frame to descend, thereby lowering the third conveyor chain so that the steel pipe 8 falls onto the unloading conveyor device 6. In this embodiment, the third drive assembly is connected to each of the third drive wheels, and the third lifting assembly is also connected to each of the third conveyor frames.

[0152] like Figure 6 , 7 As shown, the first drive assembly may include a first drive shaft 16 and a first motor 17; wherein, the first drive shaft 16 is connected to the first drive wheel, and the first motor 17 is connected to one of the first conveyor frames 15. The first motor 17 is connected to the first drive shaft 16 and is used to drive the first drive shaft 16 to rotate, thereby driving the first drive wheel to rotate, thereby driving the first conveyor chain to move to convey the steel pipe 8; in this embodiment, the first drive shaft 16 is connected to each of the first drive wheels.

[0153] The second drive assembly may include a second drive shaft and a second motor; wherein the second drive shaft is connected to the second drive wheel, the second motor is connected to one of the second conveyor frames, the second motor is connected to the second drive shaft and is used to drive the second drive shaft to rotate, thereby driving the second drive wheel to rotate, thereby driving the second conveyor chain to move to convey the steel pipe 8; in this embodiment, the second drive shaft is connected to each of the second drive wheels.

[0154] The third drive assembly may include a third drive shaft and a third motor; wherein, the third drive shaft is connected to the third drive wheel, and the third motor is connected to one of the third conveyor frames. The third motor is connected to the third drive shaft and is used to drive the third drive shaft to rotate, thereby driving the third drive wheel to rotate, and thus driving the third conveyor chain to move to convey the steel pipe 8. In this embodiment, the third drive shaft is connected to each of the third drive wheels.

[0155] like Figure 6 , 7 As shown, the first lifting assembly may include a first rotating shaft 18, a first power component, a first front swing arm 19, a first rear swing arm 20, a first front support roller 21, a first rear support roller 22, a first front transmission arm 23, a first rear transmission arm 24, and a first connecting rod 25.

[0156] Among them, the first front swing arm 19, the first rear swing arm 20, the first front support roller 21, the first rear support roller 22, the first front transmission arm 23, the first rear transmission arm 24 and the first connecting rod 25 correspond one-to-one with the first conveyor frame 15.

[0157] The first rotating shaft 18 is rotatably connected to the first frame 12;

[0158] One end of the first front swing arm 19 is connected to the first rotating shaft 18, and the first front support roller 21 is rotatably connected to the other end of the corresponding first front swing arm 19 and abuts upward against the front end of the corresponding first conveyor frame 15.

[0159] One end of the first rear swing arm 20 is rotatably connected to the first frame 12, and the first rear support roller 22 is rotatably connected to the other end of the corresponding first rear swing arm 20 and abuts upward against the rear end of the corresponding first conveyor frame 15.

[0160] One end of the first front drive arm 23 is connected to the corresponding first front swing arm 19, one end of the first rear drive arm 24 is connected to the corresponding first rear swing arm 20, one end of the first connecting rod 25 is hinged to the other end of the corresponding first front drive arm 23, and the other end of the first connecting rod 25 is hinged to the other end of the corresponding first rear drive arm 24.

[0161] The first power component is connected to the first rotating shaft 18 and is used to drive the first rotating shaft 18 to rotate;

[0162] Specifically, when the first power component drives the first rotating shaft 18 to rotate, the first rotating shaft 18 can drive the first front swing arm 19 to rotate, the first front swing arm 19 can drive the first front transmission arm 23 to rotate, the first front transmission arm 23 can drive the first rear transmission arm 24 to rotate via the first connecting rod 25, and the first rear transmission arm 24 can drive the first rear swing arm 20 to rotate. During the rotation of the first front swing arm 19 and the first rear swing arm 20 together, the first front support roller 21 and the first rear support roller 22 always press upward against the corresponding first conveyor frame 15, thereby driving the first conveyor frame 15 to slide up and down on the first frame 12. The first front swing arm 19 and the first rear swing arm 20 are parallel and of equal length, and the first front transmission arm 23 and the first rear transmission arm 24 are parallel and of equal length.

[0163] The second lifting assembly may include a second rotating shaft, a second power component, a second front swing arm, a second rear swing arm, a second front support roller, a second rear support roller, a second front transmission arm, a second rear transmission arm, and a second connecting rod;

[0164] Among them, the second front swing arm, the second rear swing arm, the second front support roller, the second rear support roller, the second front drive arm, the second rear drive arm, and the second connecting rod correspond one-to-one with the second conveyor frame;

[0165] The second shaft is rotatably connected to the second frame;

[0166] One end of the second front swing arm is connected to the second rotating shaft, and the second front support roller is rotatably connected to the other end of the corresponding second front swing arm and abuts upward against the front end of the corresponding second conveyor frame;

[0167] One end of the second rear swing arm is rotatably connected to the second frame, and the second rear support roller is rotatably connected to the other end of the corresponding second rear swing arm and abuts upward against the rear end of the corresponding second conveyor frame;

[0168] One end of the second front drive arm is connected to the corresponding second front swing arm, one end of the second rear drive arm is connected to the corresponding second rear swing arm, one end of the second link is hinged to the other end of the corresponding second front drive arm, and the other end of the second link is hinged to the other end of the corresponding second rear drive arm.

[0169] The second power component is connected to the second rotating shaft and is used to drive the second rotating shaft to rotate;

[0170] Specifically, when the second power component drives the second rotating shaft to rotate, the second rotating shaft can drive the second front swing arm to rotate, the second front swing arm can drive the second front transmission arm to rotate, the second front transmission arm can drive the second rear transmission arm to rotate via the second connecting rod, and the second rear transmission arm can drive the second rear swing arm to rotate. During the rotation of the second front and second rear swing arms together, the second front and second rear support rollers always press upwards against the corresponding second conveyor frame, thereby driving the second conveyor frame to slide up and down on the second frame. The second front swing arm and the second rear swing arm are parallel and of equal length, as are the second front transmission arm and the second rear transmission arm.

[0171] The third lifting assembly may include a third rotating shaft, a third power unit, a third front swing arm, a third rear swing arm, a third front support roller, a third rear support roller, a third front transmission arm, a third rear transmission arm, and a third connecting rod.

[0172] Among them, the third front swing arm, the third rear swing arm, the third front support roller, the third rear support roller, the third front transmission arm, the third rear transmission arm, and the third connecting rod correspond one-to-one with the third conveyor frame;

[0173] The third rotating shaft is rotatably connected to the third frame;

[0174] One end of the third front swing arm is connected to the third rotating shaft, and the third front support roller is rotatably connected to the other end of the corresponding third front swing arm and abuts upward against the front end of the corresponding third conveyor frame.

[0175] One end of the third rear swing arm is rotatably connected to the third frame, and the third rear support roller is rotatably connected to the other end of the corresponding third rear swing arm and abuts upward against the rear end of the corresponding third conveyor frame;

[0176] One end of the third front drive arm is connected to the corresponding third front swing arm, one end of the third rear drive arm is connected to the corresponding third rear swing arm, one end of the third link is hinged to the other end of the corresponding third front drive arm, and the other end of the third link is hinged to the other end of the corresponding third rear drive arm.

[0177] The third power component is connected to the third rotating shaft and is used to drive the third rotating shaft to rotate;

[0178] Specifically, when the third power component drives the third rotating shaft to rotate, the third rotating shaft can drive the third front swing arm to rotate, the third front swing arm can drive the third front transmission arm to rotate, the third front transmission arm can drive the third rear transmission arm to rotate via the third connecting rod, and the third rear transmission arm can drive the third rear swing arm to rotate. During the rotation of the third front and third rear swing arms together, the third front and third rear support rollers always press upwards against the corresponding third conveyor frame, thereby enabling the third conveyor frame to slide up and down on the third frame. The third front swing arm and the third rear swing arm are parallel and of equal length, and the third front transmission arm and the third rear transmission arm are parallel and of equal length.

[0179] like Figure 6 , 7 As shown, the first power component may include a first telescopic drive member 26 and a first drive arm 27;

[0180] One end of the first drive arm 27 is connected to the first rotating shaft 18;

[0181] One end of the first telescopic drive member 26 is hinged to the first frame 12, and the other end of the first telescopic drive member 26 is hinged to the other end of the first drive arm 27. The first telescopic drive member is used to drive the first drive arm 27 to swing, thereby driving the first rotating shaft 18 to rotate.

[0182] The second power component may include a second telescopic drive member and a second drive arm;

[0183] One end of the second drive arm is connected to the second rotating shaft;

[0184] One end of the second telescopic drive member is hinged to the second frame, and the other end of the second telescopic drive member is hinged to the other end of the second drive arm. The second telescopic drive member is used to drive the second drive arm to swing, thereby driving the second rotating shaft to rotate.

[0185] The third power component may include a third telescopic drive element and a third drive arm;

[0186] One end of the third drive arm is connected to the third rotating shaft;

[0187] One end of the third telescopic drive member is hinged to the third frame, and the other end of the third telescopic drive member is hinged to the other end of the third drive arm. The third telescopic drive member is used to drive the third drive arm to swing, thereby driving the third rotating shaft to rotate. In this embodiment, the first telescopic drive member 26, the second telescopic drive member and the third telescopic drive member can all be electric cylinders.

[0188] like Figure 1 As shown, the main roller conveyor device 2 may include an inlet roller conveyor 28, an inlet roller conveyor 29, and an outlet roller conveyor 30.

[0189] The furnace body 1 has an inlet and an outlet;

[0190] The furnace roller conveyor 29 is located on the inner side of the furnace body 1.

[0191] The furnace feed roller conveyor 28 is located on the outside of the furnace body 1 and on one side of the inlet of the furnace body 1;

[0192] The furnace discharge roller conveyor 30 is located on the outside of the furnace body 1 and on one side of the outlet of the furnace body 1;

[0193] The furnace inlet roller conveyor 28, the furnace inlet roller conveyor 29, and the furnace outlet roller conveyor 30 are connected in sequence.

[0194] The front roller conveyor 3 is connected to the furnace inlet roller conveyor 28, and the rear roller conveyor 4 is connected to the furnace outlet roller conveyor 30.

[0195] Specifically, the front roller conveyor 3, the rear roller conveyor 4, the transition roller conveyor 9, the furnace entry roller conveyor 28, the furnace inner roller conveyor 29, and the furnace exit roller conveyor 30 are all roller conveyors. The specific structure of the roller conveyor is existing technology well known to those skilled in the art, and will not be described in detail in this embodiment.

[0196] like Figure 1 As shown, the automatic loading and unloading roller hearth furnace also includes in-furnace sensors, external furnace sensors, and a controller;

[0197] The furnace body 1 is also equipped with a door device at its inlet;

[0198] The furnace body 1 is divided into a sealing section, a heating section and a slow cooling section from the inlet to the outlet.

[0199] The in-furnace sensor is used to detect whether there is a steel pipe 8 in the sealed section inside the furnace body 1 and to send the detection signal to the controller;

[0200] The external furnace sensor is used to detect whether there is a steel pipe 8 on the furnace feed roller 28 and to send the detection signal to the controller;

[0201] The controller is connected to the door device and is used to control the door device to open when the in-furnace sensor does not detect the steel pipe 8 and the out-of-furnace sensor detects the steel pipe 8. Specifically, both the in-furnace sensor and the out-of-furnace sensor are through-beam photoelectric sensors. The specific structure of the door device is existing technology well known to those skilled in the art and will not be described in detail in this embodiment. In this embodiment, a chimney 31, an exhaust fan 32, a combustion fan 33, an RX gas generator 34, a gas analyzer 35, and a protective gas valve station 36 are also provided on one side of the furnace body 1.

[0202] In summary, the feeding conveyor 5 first transports the steel pipe 8 above the first transfer mechanism 7. The first transfer mechanism 7 then lifts the steel pipe 8 from the feeding conveyor 5 and transports it to the front roller conveyor 3. The front roller conveyor 3 then transports the steel pipe 8 to the main roller conveyor 2, thus completing the automatic feeding of the steel pipe 8. Next, the main roller conveyor 2 transports the steel pipe 8 through the furnace body 1, where heat treatment of the steel pipe 8 can be completed. The main roller conveyor 2 then transports the steel pipe 8 to the rear roller conveyor 4. The unloading transfer device then lifts the steel pipe 8 from the rear roller conveyor 4 and transports it to the unloading conveyor 6. The unloading conveyor 6 then transports the steel pipe 8 to the subsequent process, thus completing the automatic unloading of the steel pipe 8, making it more convenient to use.

[0203] The specific embodiments described above further illustrate the technical problems, technical solutions, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A roller hearth furnace with automatic loading and unloading, characterized in that, It includes a furnace body (1), a main roller conveyor (2), a front roller conveyor (3), a rear roller conveyor (4), a feeding conveyor (5), a discharging conveyor (6), a first transfer mechanism (7), and a discharging transfer device; The feeding conveyor (5) is used to move the steel pipe (8) above the first transfer mechanism (7); The first transfer mechanism (7) is used to lift the steel pipe (8) on the feeding conveyor (5) upward and transport the steel pipe (8) to the front roller conveyor (3); The front roller conveyor (3) is connected to one end of the main roller conveyor device (2) and is used to transport the steel pipe (8) onto the main roller conveyor device (2); The main roller conveyor (2) passes through the furnace body (1) and is used to convey the steel pipe (8) through the furnace body (1); The rear roller conveyor (4) is connected to the other end of the main roller conveyor device (2) and is used to receive the steel pipe (8) on the main roller conveyor device (2). The unloading and transfer device is used to lift the steel pipe (8) on the rear roller conveyor (4) upward and transport the steel pipe (8) to the unloading and conveying device (6); The feeding and conveying device (6) is used to receive and convey the steel pipe (8).

2. The automatic loading and unloading roller hearth furnace according to claim 1, characterized in that, The material transfer device includes a transition roller conveyor (9), a second transfer mechanism (10), and a third transfer mechanism (11). The transition roller conveyor (9) is provided with a receiving station and a discharging station. The transition roller conveyor (9) is used to transport the steel pipe (8) in the receiving station to the discharging station. The second transfer mechanism (10) is used to lift the steel pipe (8) on the rear roller conveyor (4) upward and transport the steel pipe (8) to the receiving station on the transition roller conveyor (9); The third transfer mechanism (11) is used to lift the steel pipe (8) in the unloading station on the transition roller conveyor (9) and transport the steel pipe (8) to the unloading conveyor (6).

3. The automatic loading and unloading roller hearth furnace according to claim 2, characterized in that, The first transfer mechanism (7) includes a first frame (12), a first drive assembly, a first lifting assembly, and at least two first conveying assemblies (13) arranged in parallel. The first conveying assembly (13) is slidably connected to the first frame (12) in the vertical direction; The first drive assembly is connected to the first conveying assembly (13) and is used to drive the first conveying assembly (13) to move the lifted steel pipe (8) above the front roller conveyor (3); The first lifting assembly is connected to the first frame (12) and connected to the first conveying assembly (13). The first lifting assembly is used to drive the first conveying assembly (13) to rise up to lift the steel pipe (8) on the feeding conveying device (5) and to drive the first conveying assembly (13) to fall down so that the steel pipe (8) falls on the front roller conveyor (3). The second transfer mechanism (10) includes a second frame, a second drive assembly, a second lifting assembly, and at least two second conveying assemblies arranged in parallel. The second conveying assembly is slidably connected to the second frame in the vertical direction; The second drive assembly is connected to the second conveying assembly and is used to drive the second conveying assembly to move the lifted steel pipe (8) above the transition roller table (9); The second lifting assembly is connected to the second frame and connected to the second conveying assembly. The second lifting assembly is used to drive the second conveying assembly to rise up to lift the steel pipe (8) on the rear roller conveyor (4) and to drive the second conveying assembly to fall down so that the steel pipe (8) falls on the receiving station in the transition roller conveyor (9). The third transfer mechanism (11) includes a third frame, a third drive assembly, a third lifting assembly, and at least two parallel third conveying assemblies; The third conveying assembly is slidably connected to the third frame in the vertical direction; The third drive assembly is connected to the third conveying assembly and is used to drive the third conveying assembly to move the lifted steel pipe (8) above the unloading conveying device (6); The third lifting assembly is connected to the third frame and to the third conveying assembly. The third lifting assembly is used to drive the third conveying assembly to rise up to lift the steel pipe (8) in the unloading station on the transition roller conveyor (9) and to drive the third conveying assembly to fall so that the steel pipe (8) falls on the unloading conveying device (6).

4. The automatic loading and unloading roller hearth furnace according to claim 3, characterized in that, The front roller conveyor (3) is provided with a first groove (14) corresponding to the first conveying component (13). When the first lifting component drives the first conveying component (13) to descend, one end of the first conveying component (13) descends into the first groove (14). The rear roller conveyor (4) is provided with a second groove corresponding to the second conveying component, and the transition roller conveyor (9) is provided with a third groove corresponding to the second conveying component. When the second lifting component drives the second conveying component to descend, one end of the second conveying component descends into the second groove and the other end of the second conveying component descends into the third groove. The transition roller conveyor (9) is provided with a fourth groove corresponding to the third conveying component. When the third lifting component drives the third conveying component to descend, one end of the third conveying component descends into the fourth groove.

5. The automatic loading and unloading roller hearth furnace according to claim 3, characterized in that, The first conveying assembly (13) includes a first conveying frame (15), a first driving wheel, a first driven wheel, and a first conveying chain; The first conveyor frame (15) is slidably connected to the first frame (12) in the vertical direction; The first driving wheel and the first driven wheel are rotatably connected to the first conveyor frame (15); The first conveyor chain is connected to the first driving wheel and the first driven wheel, and the steel pipe (8) is used to support the first conveyor chain; The first drive assembly is connected to the first drive wheel and is used to drive the first drive wheel to rotate, thereby driving the first conveying chain to move and convey the steel pipe (8) to move; The first lifting assembly is connected to the first frame (12) and connected to the first conveyor frame (15). The first lifting assembly is used to drive the first conveyor frame (15) to rise and thus drive the first conveyor chain to rise to lift the steel pipe (8) on the feeding conveyor device (5). The first lifting assembly is also used to drive the first conveyor frame (15) to fall and thus drive the first conveyor chain to fall so that the steel pipe (8) falls on the front roller conveyor (3). The second conveying assembly includes a second conveyor frame, a second drive wheel, a second driven wheel, and a second conveying chain; The second conveyor frame is slidably connected to the second frame in the vertical direction; The second driving wheel and the second driven wheel are rotatably connected to the second conveyor frame, respectively; The second conveyor chain is connected to the second driving wheel and the second driven wheel, and the steel pipe (8) is used to support the second conveyor chain; The second drive assembly is connected to the second drive wheel and is used to drive the second drive wheel to rotate, thereby driving the second conveyor chain to move the steel pipe (8); The second lifting assembly is connected to the second frame and connected to the second conveyor frame. The second lifting assembly is used to drive the second conveyor frame to rise and thus drive the second conveyor chain to rise to lift the steel pipe (8) on the rear roller conveyor (4). The second lifting assembly is also used to drive the second conveyor frame to fall and thus drive the second conveyor chain to fall so that the steel pipe (8) falls on the transition roller conveyor (9). The third conveying assembly includes a third conveying frame, a third driving wheel, a third driven wheel, and a third conveying chain; The third conveyor frame is slidably connected to the third frame in the vertical direction; The third driving wheel and the third driven wheel are respectively rotatably connected to the third conveyor frame; The third conveyor chain is connected to the third driving wheel and the third driven wheel, and the steel pipe (8) is used to support the third conveyor chain; The third drive assembly is connected to the third drive wheel and is used to drive the third drive wheel to rotate, thereby driving the third conveying chain to move and convey the steel pipe (8) to move. The third lifting assembly is connected to the third frame and to the third conveyor frame. The third lifting assembly is used to drive the third conveyor frame to rise and thus drive the third conveyor chain to rise to lift the steel pipe (8) on the transition roller table (9). The third lifting assembly is also used to drive the third conveyor frame to fall and thus drive the third conveyor chain to fall so that the steel pipe (8) falls on the unloading conveyor device (6).

6. The automatic loading and unloading roller hearth furnace according to claim 5, characterized in that, The first drive assembly includes a first drive shaft (16) and a first motor (17); wherein the first drive shaft (16) is connected to the first drive wheel, the first motor (17) is connected to one of the first conveyor frames (15), the first motor (17) is connected to the first drive shaft (16) and is used to drive the first drive shaft (16) to rotate, thereby driving the first drive wheel to rotate, thereby driving the first conveyor chain to move to convey the steel pipe (8) to move; The second drive assembly includes a second drive shaft and a second motor; wherein the second drive shaft is connected to the second drive wheel, the second motor is connected to one of the second conveyor frames, the second motor is connected to the second drive shaft and is used to drive the second drive shaft to rotate, thereby driving the second drive wheel to rotate, thereby driving the second conveyor chain to move to convey the steel pipe (8) to move; The third drive assembly includes a third drive shaft and a third motor; wherein the third drive shaft is connected to the third drive wheel, the third motor is connected to one of the third conveyor frames, the third motor is connected to the third drive shaft and is used to drive the third drive shaft to rotate, thereby driving the third drive wheel to rotate, thereby driving the third conveyor chain to move to convey the steel pipe (8) to move.

7. The automatic loading and unloading roller hearth furnace according to claim 5, characterized in that, The first lifting assembly includes a first rotating shaft (18), a first power component, a first front swing arm (19), a first rear swing arm (20), a first front support roller (21), a first rear support roller (22), a first front transmission arm (23), a first rear transmission arm (24), and a first connecting rod (25). Among them, the first front swing arm (19), the first rear swing arm (20), the first front support roller (21), the first rear support roller (22), the first front transmission arm (23), the first rear transmission arm (24) and the first connecting rod (25) correspond one-to-one with the first conveyor frame (15); The first rotating shaft (18) is rotatably connected to the first frame (12); One end of the first front swing arm (19) is connected to the first rotating shaft (18), and the first front support roller (21) is rotatably connected to the other end of the corresponding first front swing arm (19) and abuts against the front end of the corresponding first conveyor frame (15); One end of the first rear swing arm (20) is rotatably connected to the first frame (12), and the first rear support roller (22) is rotatably connected to the other end of the corresponding first rear swing arm (20) and abuts upward against the rear end of the corresponding first conveyor frame (15); One end of the first front drive arm (23) is connected to the corresponding first front swing arm (19), one end of the first rear drive arm (24) is connected to the corresponding first rear swing arm (20), one end of the first connecting rod (25) is hinged to the other end of the corresponding first front drive arm (23), and the other end of the first connecting rod (25) is hinged to the other end of the corresponding first rear drive arm (24). The first power component is connected to the first rotating shaft (18) and is used to drive the first rotating shaft (18) to rotate; The second lifting assembly includes a second rotating shaft, a second power component, a second front swing arm, a second rear swing arm, a second front support roller, a second rear support roller, a second front transmission arm, a second rear transmission arm, and a second connecting rod; Among them, the second front swing arm, the second rear swing arm, the second front support roller, the second rear support roller, the second front drive arm, the second rear drive arm, and the second connecting rod correspond one-to-one with the second conveyor frame; The second shaft is rotatably connected to the second frame; One end of the second front swing arm is connected to the second rotating shaft, and the second front support roller is rotatably connected to the other end of the corresponding second front swing arm and abuts upward against the front end of the corresponding second conveyor frame; One end of the second rear swing arm is rotatably connected to the second frame, and the second rear support roller is rotatably connected to the other end of the corresponding second rear swing arm and abuts upward against the rear end of the corresponding second conveyor frame; One end of the second front drive arm is connected to the corresponding second front swing arm, one end of the second rear drive arm is connected to the corresponding second rear swing arm, one end of the second link is hinged to the other end of the corresponding second front drive arm, and the other end of the second link is hinged to the other end of the corresponding second rear drive arm. The second power component is connected to the second rotating shaft and is used to drive the second rotating shaft to rotate; The third lifting assembly includes a third rotating shaft, a third power component, a third front swing arm, a third rear swing arm, a third front support roller, a third rear support roller, a third front transmission arm, a third rear transmission arm, and a third connecting rod. Among them, the third front swing arm, the third rear swing arm, the third front support roller, the third rear support roller, the third front transmission arm, the third rear transmission arm, and the third connecting rod correspond one-to-one with the third conveyor frame; The third rotating shaft is rotatably connected to the third frame; One end of the third front swing arm is connected to the third rotating shaft, and the third front support roller is rotatably connected to the other end of the corresponding third front swing arm and abuts upward against the front end of the corresponding third conveyor frame. One end of the third rear swing arm is rotatably connected to the third frame, and the third rear support roller is rotatably connected to the other end of the corresponding third rear swing arm and abuts upward against the rear end of the corresponding third conveyor frame; One end of the third front drive arm is connected to the corresponding third front swing arm, one end of the third rear drive arm is connected to the corresponding third rear swing arm, one end of the third link is hinged to the other end of the corresponding third front drive arm, and the other end of the third link is hinged to the other end of the corresponding third rear drive arm. The third power component is connected to the third rotating shaft and is used to drive the third rotating shaft to rotate.

8. The automatic loading and unloading roller hearth furnace according to claim 7, characterized in that, The first power component includes a first telescopic drive member (26) and a first drive arm (27). One end of the first drive arm (27) is connected to the first rotating shaft (18); One end of the first telescopic drive member (26) is hinged to the first frame (12), and the other end of the first telescopic drive member (26) is hinged to the other end of the first drive arm (27). The first telescopic drive member (26) is used to drive the first drive arm (27) to swing and thereby drive the first rotating shaft (18) to rotate. The second power component includes a second telescopic drive member and a second drive arm; One end of the second drive arm is connected to the second rotating shaft; One end of the second telescopic drive member is hinged to the second frame, and the other end of the second telescopic drive member is hinged to the other end of the second drive arm. The second telescopic drive member is used to drive the second drive arm to swing, thereby driving the second rotating shaft to rotate. The third power component includes a third telescopic drive element and a third drive arm; One end of the third drive arm is connected to the third rotating shaft; One end of the third telescopic drive member is hinged to the third frame, and the other end of the third telescopic drive member is hinged to the other end of the third drive arm. The third telescopic drive member is used to drive the third drive arm to swing, thereby driving the third rotating shaft to rotate.

9. The automatic loading and unloading roller hearth furnace according to claim 1, characterized in that, The main roller conveyor device (2) includes an inlet roller conveyor (28), an inlet roller conveyor (29), and an outlet roller conveyor (30). The furnace body (1) has an inlet and an outlet; The inner roller conveyor (29) is located on the inner side of the furnace body (1). The furnace feed roller conveyor (28) is located on the outside of the furnace body (1) and on one side of the inlet of the furnace body (1); The furnace discharge roller conveyor (30) is located on the outside of the furnace body (1) and on one side of the outlet of the furnace body (1); The furnace inlet roller conveyor (28), the furnace inlet roller conveyor (29), and the furnace outlet roller conveyor (30) are connected in sequence; The front roller conveyor (3) is connected to the furnace inlet roller conveyor (28), and the rear roller conveyor (4) is connected to the furnace outlet roller conveyor (30).

10. The automatic loading and unloading roller hearth furnace according to claim 9, characterized in that, It also includes in-furnace sensors, external furnace sensors, and controllers; The furnace body (1) is also equipped with a door device at its inlet; The furnace body (1) is divided into a sealing section, a heating section and a slow cooling section from the inlet to the outlet. The in-furnace sensor is used to detect whether there is a steel pipe (8) in the sealed section inside the furnace body (1) and to send the detection signal to the controller. The external sensor is used to detect whether there is a steel pipe (8) on the furnace feed roller (28) and to send the detection signal to the controller; The controller is connected to the door device and is used to control the door device to open when the in-furnace sensor does not detect the steel pipe (8) and the out-of-furnace sensor detects the steel pipe (8).

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