Chain type intermediate heating furnace

Abstract

The utility model provides a chain type intermediate heating furnace, which relates to the field of aluminum blank wheel heating, and comprises a furnace body, a chain driving mechanism and a control component, furnace door lifting mechanisms are arranged at two ends of the furnace body, the interior of the furnace body is divided into three areas, a circulating fan blowing air into the furnace body is arranged at the top of each area of the furnace body, and the chain driving mechanism is arranged on the chain driving mechanism. Three sets of heating assemblies are arranged on the outer wall of one side of the furnace body, the positions of the three sets of heating assemblies correspond to the positions of the circulating fans, a smoke exhaust pipe is arranged at the top of one end of the furnace body, a combustion fan is arranged at the middle end of the top of the furnace body, and the output end of the combustion fan faces one side of the smoke exhaust pipe; according to the utility model, the air outlet of the combustion-supporting fan blows to the smoke exhaust pipe on the top of the furnace body, and combustion-supporting air is preheated in the smoke exhaust pipe and then is distributed to each burner interface by the combustion-supporting pipeline, so that the utilization rate of energy is improved, the temperature of exhausted smoke is reduced, and the service life of the smoke exhaust pipeline is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of heating aluminum blank wheels, in particular to a chain-type intermediate heating furnace. Background Art

[0002] At present, aluminum wheels on cars are all produced by gravity casting. In order to improve the strength of aluminum wheels, spinning is an advanced new process for wheel production. Heating the blank of spinning wheel production is the main energy-consuming process. The existing heating furnace consumes a lot of energy and is not environmentally friendly. Therefore, the utility model proposes a chain-type intermediate heating furnace to solve the problems existing in the prior art. Utility Model Content

[0003] In view of the above problems, the utility model proposes a chain-type intermediate heating furnace, which blows the air outlet of the combustion-supporting fan to the smoke exhaust pipe on the top of the furnace body. The combustion-supporting air is preheated here and then distributed to each burner interface by the combustion-supporting pipe. This not only improves the energy utilization rate, but also reduces the exhaust temperature and extends the service life of the smoke exhaust pipe.

[0004] To achieve the purpose of the utility model, the utility model is implemented through the following technical solutions: a chain-type intermediate heating furnace, comprising a furnace body, a chain driving mechanism and a control component, furnace door lifting mechanisms are provided at both ends of the furnace body, the interior of the furnace body is divided into three areas, a circulating fan for blowing air into the furnace body is provided at the top of each area of ​​the furnace body, three groups of heating components are provided on the outer wall of one side of the furnace body, the positions of the three groups of heating components correspond to the positions of the circulating fans, a smoke exhaust pipe is provided at the top of one end of the furnace body, a combustion-supporting fan is provided at the middle end of the top of the furnace body, and the output end of the combustion-supporting fan faces one side of the smoke exhaust pipe;

[0005] The heating component includes a gas pipeline, a combustion-supporting pipeline, a burner and a combustion controller. The combustion controller is fixed on the outer wall of the furnace body. One end of the burner passes through the furnace body and extends to the bottom of the circulation fan. The gas pipeline is connected with the outer end of the burner from bottom to top, and one end of the combustion-supporting pipeline is connected with the outer end of the burner from top to bottom. The other end of the combustion-supporting pipeline is located on one side of the smoke exhaust pipe. The combustion controller is connected to the control component and automatically controls the status of the combustion-supporting pipeline, the gas pipeline and the burner.

[0006] A further improvement is that the chain drive mechanism includes a frame, a sprocket, a chain, a fixed seat, a movable seat, a motor and a pneumatic cylinder. The frames are located at both ends of the furnace body. One group of frames is provided with a fixed seat, and the other group of frames is provided with a movable seat. Both the fixed seat and the movable seat are provided with sprockets. A chain is provided between the two groups of sprockets. The fixed seat is provided with a motor for driving the sprocket to rotate. A pneumatic cylinder is provided on one side of the movable seat. The pneumatic cylinder pushes the movable seat to move so as to tension the chain.

[0007] A further improvement is that an air guide plate is provided inside the furnace body below the burner nozzle and the circulating fan, and a plurality of groups of guide holes are provided on the air guide plate.

[0008] A further improvement is that the furnace door lifting mechanism includes a hoist and a furnace door, two groups of furnace doors are symmetrically provided at both ends of the furnace body, the top of the furnace door is fixedly connected to the hoist, and the hoist is fixedly connected to the furnace body.

[0009] A further improvement is that the furnace body is welded with high-quality carbon steel profiles, an insulation layer is provided inside the furnace body, and the insulation layer is filled with high-quality fiberboard cotton.

[0010] A further improvement is that the steel inside the furnace body is fixed by a structure in which the steel is staggered and overlapped and is tightened and fixed by screws.

[0011] A further improvement is that a guardrail is provided on the top of the furnace body and a ladder is provided on one side of the furnace body.

[0012] The beneficial effects of the utility model are as follows: the utility model directs the air outlet of the combustion-supporting fan to the smoke exhaust pipe on the top of the furnace body, where the combustion-supporting air is preheated and then distributed to the burner interfaces by the combustion-supporting pipe, which not only improves the energy utilization rate, but also reduces the temperature of the smoke exhaust and extends the service life of the smoke exhaust pipe. At the same time, the structure of staggered overlapping distribution of folded edges and screw compression and fixing can obtain a good expansion absorption effect and solve the problem of steel plate expansion in the furnace. At the same time, since the chain will produce high-temperature extension under the high-temperature state in the furnace, it can be automatically tensioned by the pneumatic cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a front sectional view of the utility model.

[0014] Figure 2 It is a right side sectional view of the utility model.

[0015] Figure 3 It is a front view of the utility model.

[0016] Figure 4 It is a right view of the utility model.

[0017] Figure 5 It is a top view of the utility model.

[0018] Among them: 1. furnace body; 2. circulation fan; 3. exhaust pipe; 4. combustion-supporting fan; 5. gas pipeline; 6. combustion-supporting pipeline; 7. burner; 8. combustion controller; 9. frame; 10. sprocket; 11. chain; 12. fixed seat; 13. movable seat; 14. motor; 15. pneumatic cylinder; 16. air guide plate; 17. guide hole; 18. hoist; 19. furnace door; 20. insulation layer; 21. guardrail; 22. ladder. DETAILED DESCRIPTION

[0019] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with an embodiment. The embodiment is only used to explain the present invention and does not constitute a limitation on the protection scope of the present invention.

[0020] according to Figure 1-5 As shown, this embodiment proposes a chain-type intermediate heating furnace, including a furnace body 1, a chain 11 driving mechanism and a control component, both ends of the furnace body 1 are provided with a furnace door 19 lifting mechanism 18, the interior of the furnace body 1 is divided into three areas, the top of each area of ​​the furnace body 1 is provided with a circulating fan 2 for blowing air into the furnace body 1, three groups of heating components are provided on the outer wall of one side of the furnace body 1, and the positions of the three groups of heating components correspond to the positions of the circulating fan 2, a smoke exhaust pipe 3 is provided on the top of one end of the furnace body 1, and a combustion-supporting fan 4 is provided at the middle end of the top of the furnace body 1, and the output end of the combustion-supporting fan 4 faces the side of the smoke exhaust pipe 3;

[0021] The heating assembly includes a gas pipeline 5, a combustion-supporting pipeline 6, a burner 7 and a combustion controller 8. The combustion controller 8 is fixed on the outer wall of the furnace body 1. One end of the burner 7 passes through the furnace body 1 and extends to the bottom of the circulation fan 2. The gas pipeline 5 is connected with the outer end of the burner 7 from bottom to top, and one end of the combustion-supporting pipeline 6 is connected with the outer end of the burner 7 from top to bottom. The other end of the combustion-supporting pipeline 6 is located on one side of the smoke exhaust pipe 3. The combustion controller 8 is connected to the control assembly and automatically controls the states of the combustion-supporting pipeline 6, the gas pipeline 5 and the burner 7.

[0022] The furnace body 1 is welded with high-quality carbon steel profiles, and a heat-insulating layer 20 is provided inside the furnace body 1, and the heat-insulating layer 20 is filled with high-quality fiberboard cotton;

[0023] The steel inside the furnace body 1 is fixed by a structure in which the folded edges are staggered and overlapped and the screws are pressed and fixed.

[0024] The control component is mainly composed of temperature control unit, beat time, transmission control unit, temperature recording, on-site operation station, etc. The temperature control unit converts the temperature in the furnace into a standard current signal by a thermocouple inserted into the furnace, and sends it to the temperature control instrument with a temperature control accuracy of ±1°C and a stability of ±1°C. It is compared with the set temperature and PID adjustment operation, and outputs a 4-20mA control signal. The air-fuel ratio valve continuously adjusts the opening according to the 4-20mA signal to achieve the purpose of accurate temperature control.

[0025] The furnace body 1 and the furnace body 1 skeleton are welded with high-quality carbon steel profiles. The furnace lining is made of high-quality cold-rolled steel plate and high-quality Q235 steel plate for the furnace outer plate to form an insulation cavity. The cavity is filled with multiple layers of high-quality fiberboard cotton. The material has the characteristics of small heat storage, light weight, and excellent thermal insulation effect. The thickness of the furnace body 1 insulation layer 20 is about 280mm, and the thickness of other local insulation layers 20 increases or decreases with the amount of heat dissipation at that location, ensuring that the overall insulation performance of the furnace body 1 and the heat dissipation of the furnace body 1 are in the best state. The insulation material has a service life of more than 10 years at the rated temperature without peeling or sinking.

[0026] Due to the high working temperature in the furnace, the steel plates in the furnace have a large thermal expansion capacity at high temperature. How to effectively absorb the thermal expansion length is the key technology to solve the expansion of the steel plates in the furnace. After years of research and development, our company has adopted a structure with staggered overlapping distribution of folded edges and screw pressing and fixing to achieve a good expansion absorption effect.

[0027] The heating furnace is divided into 3 zones, each zone is equipped with 2 vertical centrifugal circulation fans placed on the furnace top. The selection of the fan is based on the furnace temperature uniformity of ±5℃ to determine the temperature in the same zone. The design is based on the circulation frequency of the circulating air in the furnace being greater than 40 times / min.

[0028] The main parts of the heating components are all made of German KROM products (the burners are domestic brands, and the pipelines are configured according to international safety standards. The gas pipeline 5 is equipped with manual butterfly valves, pressure gauges, filters, pressure reducing valves, gas solenoid valves, safety relief valves, high and low pressure protection switches and other actuators. The combustion-supporting pipeline 6 is equipped with monitoring electrodes, flame detection and ignition program controllers, transformers, ignition electrodes, air-fuel ratio valves, air electric actuators, etc. The main valve parts are imported KROM original parts, so that the combustion controller 8 has the functions of automatic ignition, sequence control, flame monitoring, automatic temperature adjustment and flameout alarm, gas source high and low pressure alarm, combustion air high and low pressure alarm, safety fault alarm, etc.

[0029] The combustion-supporting fan 4 is a product of Zhangjiagang Fan Factory. The air outlet of the combustion-supporting fan 4 blows toward the smoke exhaust pipe 3 on the top of the furnace body 1. The combustion-supporting air is preheated here and then distributed to each burner interface by the combustion-supporting pipeline 6. This not only improves the energy utilization rate, but also reduces the exhaust temperature and extends the service life of the smoke exhaust pipe 3.

[0030] The chain 11 driving mechanism includes a frame 9, a sprocket 10, a chain 11, a fixed seat 12, a movable seat 13, a motor 14 and a pneumatic cylinder 15. The frame 9 is located at both ends of the furnace body 1. One group of the frames 9 is provided with a fixed seat 12, and the other group of the frames 9 is provided with a movable seat 13. Both the fixed seat 12 and the movable seat 13 are provided with a sprocket 10. A chain 11 is provided between the two groups of sprockets 10. The fixed seat 12 is provided with a motor 14 for driving the sprocket 10 to rotate. A pneumatic cylinder 15 is provided on one side of the movable seat 13. The pneumatic cylinder 15 pushes the movable seat 13 to move so as to tension the chain 11.

[0031] By starting the motor 14, the motor 14 drives the sprocket 10 to rotate, thereby driving the chain 11 to rotate, and then driving the blank on the chain 11 to move. At the same time, since the chain 11 will produce high-temperature extension under the high temperature state in the furnace, it can be automatically tensioned by the pneumatic cylinder 15.

[0032] An air guide plate 16 is provided inside the furnace body 1 below the burner 7 and the circulating fan 2 , and a plurality of groups of guide holes 17 are provided on the air guide plate 16 .

[0033] The furnace door 19 lifting machine 18 mechanism includes a lifting machine 18 and a furnace door 19 , two groups of furnace doors 19 are symmetrically provided at both ends of the furnace body 1 , the top of the furnace door 19 is fixedly connected to the lifting machine 18 , and the lifting machine 18 is fixedly connected to the furnace body 1 .

[0034] The shell of the furnace door 19 is a steel structure, the insulation adopts a full fiber structure, and a travel switch is provided for limiting.

[0035] A guardrail 21 is provided on the top of the furnace body 1, and a ladder 22 is provided on one side of the furnace body 1. When installing the device, the guardrail 21 can protect the installer, and the ladder 22 is convenient for the installer to climb onto the furnace top for installation work.

[0036] When the furnace of the chain-type intermediate heating furnace needs to be heated, the wind pressure and the gas pressure both meet the combustion conditions of the burner 7. The pressure switch connects the control power supply, and the control component automatically ignites to heat the furnace. When the temperature is close to the required value, under the instruction of the control instrument, the gas proportional valve and the butterfly valve of the combustion air make corresponding synchronous servo adjustments to meet the requirements of furnace temperature control and sufficient combustion. The whole system is sensitively controlled, safe and reliable. At the same time, the motor 14 starts, driving the sprocket 10 and the chain 11 to rotate, thereby sending the blank into the furnace body 1 and heating the blank.

[0037] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A chain-type intermediate heating furnace, comprising a furnace body (1), a chain (11) driving mechanism and a control component, characterized in that: Both ends of the furnace body (1) are provided with furnace doors (19) and lifting mechanisms (18); the interior of the furnace body (1) is divided into three areas; the top of each area of ​​the furnace body (1) is provided with a circulating fan (2) for blowing air into the interior of the furnace body (1); three groups of heating components are provided on the outer wall of one side of the furnace body (1); the positions of the three groups of heating components correspond to the positions of the circulating fan (2); a smoke exhaust pipe (3) is provided at the top of one end of the furnace body (1); a combustion-supporting fan (4) is provided at the middle end of the top of the furnace body (1); the output end of the combustion-supporting fan (4) faces one side of the smoke exhaust pipe (3); The heating component comprises a gas pipeline (5), a combustion-supporting pipeline (6), a burner (7) and a combustion controller (8); the combustion controller (8) is fixed on the outer wall of the furnace body (1); one end of the burner (7) passes through the furnace body (1) and extends to the bottom of the circulation fan (2); the gas pipeline (5) is connected to the outer end of the burner (7) from bottom to top; one end of the combustion-supporting pipeline (6) is connected to the outer end of the burner (7) from top to bottom; the other end of the combustion-supporting pipeline (6) is located on one side of the smoke exhaust pipe (3); the combustion controller (8) is connected to the control component and automatically controls the states of the combustion-supporting pipeline (6), the gas pipeline (5) and the burner (7).

2. A chain-type intermediate heating furnace according to claim 1, characterized in that: The chain (11) driving mechanism comprises a frame (9), a sprocket (10), a chain (11), a fixed seat (12), a movable seat (13), a motor (14) and a pneumatic cylinder (15); the frame (9) is located at both ends of the furnace body (1); one group of the frames (9) is provided with a fixed seat (12); the other group of the frames (9) is provided with a movable seat (13); the fixed seat (12) and the movable seat (13) are both provided with sprockets (10); a chain (11) is provided between the two groups of sprockets (10); the fixed seat (12) is provided with a motor (14) for driving the sprocket (10) to rotate; a pneumatic cylinder (15) is provided on one side of the movable seat (13); the pneumatic cylinder (15) pushes the movable seat (13) to move, thereby tensioning the chain (11).

3. The chain-type intermediate heating furnace according to claim 1, characterized in that: An air guide plate (16) is provided inside the furnace body (1) at a position below the burner nozzle (7) and the circulating fan (2), and a plurality of groups of guide holes (17) are provided on the air guide plate (16).

4. The chain-type intermediate heating furnace according to claim 1, characterized in that: The furnace door (19) lifting machine (18) mechanism comprises a lifting machine (18) and a furnace door (19), two sets of furnace doors (19) are symmetrically provided at both ends of the furnace body (1), the top of the furnace door (19) is fixedly connected to the lifting machine (18), and the lifting machine (18) is fixedly connected to the furnace body (1).

5. The chain-type intermediate heating furnace according to claim 1, characterized in that: The furnace body (1) is welded from high-quality carbon steel profiles, and a heat-insulating layer (20) is provided inside the furnace body (1), and the heat-insulating layer (20) is filled with high-quality fiberboard cotton.

6. The chain-type intermediate heating furnace according to claim 5, characterized in that: The steel material inside the furnace body (1) is fixed by means of a structure in which the folded edges are staggered and overlapped and the steel material is pressed and fixed by screws.

7. The chain-type intermediate heating furnace according to claim 1, characterized in that: A guardrail (21) is provided on the top of the furnace body (1), and a ladder (22) is provided on one side of the furnace body (1).

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