Push-rod furnace with hot air preheating device

Abstract

The utility model provides a push-rod furnace with a hot air preheating device, which comprises a heating chamber and a cooling chamber, waste heat discharged by the cooling chamber is introduced into the preheating chamber through a hot air pipe, the preheating chamber is used for preheating a workpiece, a conveying device is arranged in the preheating chamber and used for conveying the preheated workpiece into the heating chamber, and the conveying device is used for conveying the preheated workpiece into the heating chamber. A dispersing device is arranged at an outlet of the hot air pipe and used for guiding hot air in the hot air pipe to be evenly blown into the preheating chamber, and an inner cavity of the preheating chamber is connected with an exhaust pipe leading to the outside. The utility model has the beneficial effects that the preheating chamber is arranged, so that a workpiece is preheated before entering the heating chamber, the workpiece with an over-low temperature is prevented from generating a larger temperature difference when entering the heating chamber, and waste heat emitted by the cooling chamber can be reused to form forward circulation of resources.

Description

Technical Field

[0001] The utility model belongs to the field of heat treatment equipment, in particular to a pusher furnace with a hot air preheating device. Background Art

[0002] The push rod furnace includes a heating chamber and a cooling chamber. When heat treating the workpiece, the workpiece needs to be heated in the heating chamber first, and then sent to the cooling chamber for cooling, which meets the requirements of the workpiece processing technology;

[0003] The cooling room generally cools the workpiece by the cold energy released by the cooling pipe, that is, the cold air is blown into the cooling pipe. When the cold energy is released, the heat energy of the workpiece is also transferred to the cooling pipe, so the cold air entering the cooling pipe will be converted into hot air when it is discharged;

[0004] In the prior art, the hot air is directly discharged out of the cooling chamber through the air outlet pipe, and the hot air, i.e., the waste heat, is not reused, resulting in energy waste;

[0005] If the initial temperature of the workpiece is low, a large number of overcooled workpieces will directly enter the heating chamber, causing the temperature in the heating chamber to drop excessively, which is not conducive to the stability of the temperature in the heating chamber, and thus is not conducive to the heating of the workpiece, causing quality problems. Utility Model Content

[0006] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a push rod furnace with a hot air preheating device. By setting a preheating chamber, the workpiece is preheated before entering the heating chamber, avoiding a large temperature difference when the workpiece with too low temperature enters the heating chamber, and the waste heat emitted by the cooling chamber can be reused to form a positive cycle of resources.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is: a push rod furnace with a hot air preheating device, comprising a heating chamber and a cooling chamber, the waste heat discharged from the cooling chamber is introduced into the preheating chamber via a hot air duct, the preheating chamber is used to preheat the workpiece, and a conveying device is arranged in the preheating chamber for conveying the preheated workpiece into the heating chamber.

[0008] Furthermore, a dispersion device is provided at the outlet of the hot air pipe to guide the hot air in the hot air pipe to be evenly blown into the preheating chamber.

[0009] Furthermore, an exhaust pipe leading to the outside is connected to the inner cavity of the preheating chamber.

[0010] Furthermore, the workpiece in the cooling chamber is cooled by a cooling device, which includes a plurality of cooling pipes placed in the cooling chamber, cold air is transported to the cooling pipes and collected through an air outlet pipe, and the hot air pipe is connected to the air outlet pipe.

[0011] Furthermore, the cooling device includes an air inlet pipe, the inlet end of the cooling pipe is connected to the air inlet pipe, and cold air enters through the air inlet of the air inlet pipe.

[0012] Furthermore, the dispersion device includes a delivery pipe extending into the inner wall of the preheating chamber and a heat dissipation portion provided at the lower end and both side ends of the delivery pipe, and the hot air is blown out from the heat dissipation portion through the delivery pipe.

[0013] Furthermore, the heat dissipation part includes a main pipeline connected to the delivery pipe and a plurality of branch pipelines connected to the main pipeline, and a plurality of air outlet holes are evenly distributed on a side of the branch pipeline facing the workpiece.

[0014] Furthermore, a heat-insulating layer is laid on the outer side of the preheating chamber.

[0015] Furthermore, a plurality of heat sinks are arranged around the outer wall of the cooling tube.

[0016] Furthermore, the cooling pipe is in a "U" shape.

[0017] The advantages and positive effects of the utility model are:

[0018] 1. Due to the adoption of the above technical solution, by setting up a preheating chamber for pre-treatment of the workpiece, the temperature of the workpiece when it enters the heating chamber is increased, and the overcooled workpiece is prevented from directly contacting the heating chamber and destroying the high temperature environment inside the heating chamber, the temperature inside the heating chamber is guaranteed to be stable, and the product quality of the workpiece after heat treatment is improved.

[0019] 2. Increasing the temperature in the preheating room is to reuse the waste heat discharged from the cooling room. There is no need to set up a separate heating unit in the preheating room. While increasing the pre-process to stabilize product performance, it avoids energy waste. The gas discharged from the preheating room to the outside through the exhaust pipe, if the outlet end of the exhaust pipe is located in the workshop, can achieve heating in the workshop in winter, further realizing energy utilization.

[0020] 3. The hot air discharged from the cooling chamber is passed into the preheating chamber through a dispersion device. The dispersion device can guide the hot air to be blown out from the upper side and left and right sides of the workpiece, so that the hot air entering the preheating chamber is more uniform. The setting of the insulation layer can avoid the loss of heat energy in the preheating chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a top view of the structure of the utility model;

[0022] Figure 2 It is the AA sectional view of the utility model;

[0023] Figure 3 It is the BB sectional view of the utility model;

[0024] Figure 4 It is a schematic diagram of the heat dissipation part of the utility model.

[0025] In the figure:

[0026] 1. Heating chamber;

[0027] 2. Cooling chamber; 3. Air inlet pipe; 31. Air inlet; 32. Fan;

[0028] 4. air outlet pipe; 41. cooling pipe; 42. heat sink;

[0029] 5. hot air pipe; 51. conveying pipe; 511. pipeline;

[0030] 6. Preheating chamber; 61. Insulation layer;

[0031] 7. Main pipeline; 71. Branch pipeline; 72. Air outlet;

[0032] 8. Conveying device; 9. Exhaust pipe; 10. Workpiece. DETAILED DESCRIPTION

[0033] The utility model is further described below in conjunction with embodiments and drawings.

[0034] like Figures 1 to 4 As shown, this embodiment provides a push rod furnace with a hot air preheating device, comprising a heating chamber 1 and a cooling chamber 2 arranged in sequence, and the workpiece in the heating chamber 1 is sent to the cooling chamber 2 through a conveying device, and the conveying device is a roller conveyor;

[0035] The workpiece in the cooling chamber 2 is cooled by a cooling device, which includes a plurality of cooling pipes 41 placed in the cooling chamber 2, and both ends of the cooling pipes 21 pass through the upper end of the cooling chamber 2;

[0036] It also includes an air inlet pipe 31 and an air outlet pipe 4 arranged opposite to each other above the cooling chamber 2. The inlet ends of the plurality of cooling pipes 21 are all connected to the air inlet pipe 31, and the outlet ends are all connected to the air outlet pipe 4. External cold air enters through the air inlet 31 of the air inlet pipe 31, and the cold air passes through the cooling pipe 41 and then gathers in the air outlet pipe 4. The hot air formed after the cold energy is released in the cooling chamber 2 is discharged from the air outlet pipe 4.

[0037] In this embodiment, the cooling tube 41 is U-shaped, and a plurality of heat sinks 42 are arranged around the outer wall of the cooling tube 41 to accelerate the release of cold energy. External cold air is blown in by the fan 32 , and the output end of the fan 32 is connected to the air inlet 31 .

[0038] The preheating chamber 6 is connected to the heating chamber 1. The waste heat discharged from the air outlet pipe 4 of the cooling chamber 2 is introduced into the preheating chamber 6 through the hot air pipe 5 to preheat the workpiece 10. A conveying device 8 is provided in the preheating chamber 6 to convey the preheated workpiece 10 into the heating chamber 1. The conveying device 8 adopts a roller conveyor.

[0039] The inlet end of the hot air pipe 5 is connected to the end of the air outlet pipe 4 , and a dispersion device is provided at the outlet end of the hot air pipe 5 for guiding the hot air in the hot air pipe 5 to be evenly blown into the preheating chamber 6 .

[0040] The outlet end of the hot air pipe 5 extends to the top of the preheating chamber 6. The dispersion device includes a delivery pipe 51 and a heat dissipation part. The two ends of the delivery pipe 51 are respectively connected to the two sides of the inner wall of the preheating chamber 6. A pipe 511 extends downward from the lower end of the middle part of the delivery pipe 51. The pipe 511 passes into the upper end of the inner wall of the preheating chamber 6. The pipe 511 extending from the lower end of the delivery pipe 51 and the two ends of the delivery pipe 51 are connected to the heat dissipation part, and the hot air is blown out from the heat dissipation part through the delivery pipe 51.

[0041] The heat dissipation part includes a main pipeline 7 connected to the conveying pipe 51 and multiple branch pipelines 71 connected to the main pipeline 7. Multiple air outlet holes 72 are evenly distributed on the side of the branch pipeline 71 facing the workpiece 10. In this embodiment, the heat dissipation part blows air to heat the upper end and left and right sides of the workpiece 10.

[0042] The outer side of the preheating chamber 6 is provided with a heat-insulating layer 61 , and the bottom of the inner cavity of the preheating chamber 6 is connected with an exhaust pipe 9 leading to the outside. The heat-insulating layer 61 can be made of heat-insulating foam board, rubber or other heat-insulating materials.

[0043] The working process of this example:

[0044] The workpiece 10 is heat treated in the heating chamber 1, and the heated workpiece 10 is transported to the cooling chamber 2 via a roller conveyor;

[0045] The fan 32 blows cold air into the air inlet pipe 3, and the cold air passes through the cooling pipe 41 and is collected at the air outlet pipe 4. The cold air releases cold energy through the cooling pipe 41 to cool down the cooling chamber 2. At the same time, the heat released by the workpiece 10 is transferred to the cooling pipe 41, so that the cold air in the cooling pipe 41 is converted into hot air, and then collected by the air outlet pipe 4.

[0046] The hot air enters the preheating chamber 6 through the delivery pipe 51 at the outlet end of the hot air pipe 5 and is then discharged from the air outlet 72 on the heat dissipation part connected to the delivery pipe 51 , so that the waste heat generated by the cooling chamber 2 preheats the workpiece 10 .

[0047] The above describes one or more embodiments of the utility model in detail, but the above contents are only preferred embodiments of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model shall still fall within the scope of the patent coverage of the utility model.

Claims

1. A push rod furnace with a hot air preheating device, comprising a heating chamber (1) and a cooling chamber (2), characterized in that The waste heat discharged from the cooling chamber (2) is introduced into the preheating chamber (6) via the hot air pipe (5). The preheating chamber (6) is used to preheat the workpiece (10). A conveying device (8) is provided in the preheating chamber (6) for conveying the preheated workpiece (10) into the heating chamber (1).

2. The pusher furnace with hot air preheating device according to claim 1, characterized in that: A dispersion device is provided at the outlet of the hot air pipe (5) for guiding the hot air in the hot air pipe (5) to be evenly blown into the preheating chamber (6).

3. The pusher furnace with hot air preheating device according to claim 1, characterized in that: An exhaust pipe (9) leading to the outside is connected to the inner cavity of the preheating chamber (6).

4. The pusher furnace with hot air preheating device according to claim 1, characterized in that: The workpiece in the cooling chamber (2) is cooled by a cooling device, wherein the cooling device comprises a plurality of cooling pipes (41) disposed in the cooling chamber (2), cold air is transported into the cooling pipes (41) and collected through an air outlet pipe (4), and the hot air pipe (5) is connected to the air outlet pipe (4).

5. The pusher furnace with hot air preheating device according to claim 4, characterized in that: The cooling device comprises an air inlet pipe (3), the inlet end of the cooling pipe (41) is connected to the air inlet pipe (3), and cold air enters through the air inlet port (31) of the air inlet pipe (3).

6. The pusher furnace with hot air preheating device according to claim 2, characterized in that: The dispersion device comprises a delivery pipe (51) extending into the inner wall of the preheating chamber (6) and a heat dissipation portion arranged at the lower end and both side ends of the delivery pipe (51), and hot air is blown out from the heat dissipation portion via the delivery pipe (51).

7. The pusher furnace with hot air preheating device according to claim 6, characterized in that: The heat dissipation portion comprises a main pipeline (7) connected to the delivery pipe (51) and a plurality of branch pipelines (71) connected to the main pipeline (7), and a plurality of air outlet holes (72) are evenly distributed on one side of the branch pipeline (71) facing the workpiece (10).

8. The pusher furnace with hot air preheating device according to claim 1, characterized in that: A heat-insulating layer (61) is laid on the outer side of the preheating chamber (6).

9. The pusher furnace with hot air preheating device according to claim 4, characterized in that: A plurality of cooling fins (42) are arranged around the outer wall of the cooling tube (41).

10. The pusher furnace with hot air preheating device according to claim 4, characterized in that: The cooling pipe (41) is in a "U" shape.

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