Hot air circulating device for improving temperature uniformity of tempering furnace

Abstract

The hot air circulating device comprises a tempering furnace body (1) and a base (6) arranged on the lower side of the tempering furnace body (1), a flow guide cover (2) is arranged on the outer side of the tempering furnace body (1) and the outer side of the base (6), and a driving motor (3) is arranged at the upper end of the flow guide cover (2). An output shaft at the lower end of the driving motor (3) is connected with an exhaust fan blade (4) located at the upper end of the tempering furnace body (1), a temperature compensator (5) is arranged in the flow guide cover (2), air inlet fans (7) corresponding to the flow guide cover (2) are arranged on the two sides of the base (6), a confluence bin (8) is arranged on the inner sides of the air inlet fans (7), and a temperature uniformizing bin (9) for improving temperature uniformity is arranged on the upper side of the confluence bin (8). The temperature uniformity of the tempering furnace can be improved, and the workpiece tempering quality is improved.

Description

Technical Field

[0001] The utility model relates to a hot air circulation device, in particular to a hot air circulation device for improving the temperature uniformity of a tempering furnace. Background Art

[0002] Stress relief annealing, also known as tempering or stress relief tempering, is a key step in the spring manufacturing process. First, it helps to eliminate the internal stress generated by the wire during the cold drawing process and the cold coiling process of the spring, ensuring the quality and stability of the spring. Secondly, stress relief annealing can stabilize the size of the spring and prevent the problems of increased outer diameter and dimensional instability during subsequent processing and use. At present, springs are generally tempered in a tempering furnace. In order to improve the uniformity of the tempering furnace temperature, the existing tempering furnace is generally as described in the application number 202122446246.X. A furnace side air duct and a furnace upper air duct are set outside the heat treatment furnace, and a heat compensator 20 is provided in the furnace upper air duct 19 to make the temperature more uniform. However, there is sometimes a certain difference in temperature between the left and right sides, which will result in poor tempering quality of the workpiece. Utility Model Content

[0003] The purpose of the utility model is to provide a hot air circulation device for improving the temperature uniformity of a tempering furnace. The hot air circulation device can improve the temperature uniformity of the tempering furnace and improve the tempering quality of workpieces.

[0004] The technical solution of the present utility model is: a hot air circulation device for improving the temperature uniformity of a tempering furnace, comprising a tempering furnace body and a base arranged at the lower side of the tempering furnace body, an air guide cover is provided on the outside of the tempering furnace body and the base, a driving motor is provided at the upper end of the air guide cover, an output shaft at the lower end of the driving motor is connected to an exhaust fan blade located at the upper end of the tempering furnace body, a temperature compensator is provided in the air guide cover, air inlet fans corresponding to the air guide cover are provided on both sides of the base, a confluence bin is provided on the inside of the air inlet fan, and a temperature uniformity bin for improving temperature uniformity is provided on the upper side of the confluence bin.

[0005] In the aforementioned hot air circulation device for improving the temperature uniformity of the tempering furnace, the confluence bin includes two groups of spiral confluence channels starting from the same center, and an air inlet pipe corresponding to the air inlet fan is provided on the outside of the confluence channel.

[0006] In the aforementioned hot air circulation device for improving the temperature uniformity of the tempering furnace, an air inlet corresponding to the confluence channel is provided at the bottom center of the uniform temperature chamber, and a mixed flow channel for mixing hot air is provided on the upper side of the air inlet. The mixed flow channel is provided with multiple groups of partitions staggered left and right, and multiple groups of spoiler blocks are provided on the partitions.

[0007] In the aforementioned hot air circulation device for improving the temperature uniformity of a tempering furnace, the temperature compensator is a heating tube with an electric heating wire.

[0008] Compared with the existing technology, the utility model sets a confluence bin on the lower side of the tempering furnace body to converge the hot air in the guide cover and perform preliminary heat exchange, so that the temperature of the hot air is more uniform, and then the hot air flows into the uniform temperature bin, where the hot air is further mixed, thereby improving the temperature uniformity of the tempering furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural diagram of the utility model;

[0010] Figure 2 It is a structural schematic diagram of the confluence bin of the present utility model.

[0011] The markings in the accompanying drawings are: 1-tempering furnace body, 2-air guide cover, 3-drive motor, 4-exhaust fan blades, 5-temperature compensator, 6-base, 7-air inlet fan, 8-convergence chamber, 9-uniform temperature chamber, 10-air inlet, 11-convergence channel, 12-air inlet pipe, 13-mixing flow channel, 14-spoiler block, 15-partition. DETAILED DESCRIPTION

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0013] Embodiment. A hot air circulation device for improving the temperature uniformity of a tempering furnace, comprising: Figure 1-2 As shown, it includes a tempering furnace body 1 and a base 6 arranged on the lower side of the tempering furnace body 1, a guide cover 2 is provided on the outside of the tempering furnace body 1 and the base 6, a driving motor 3 is provided on the upper end of the guide cover 2, and the output shaft at the lower end of the driving motor 3 is connected to the exhaust fan blade 4 located at the upper end of the tempering furnace body 1, a temperature compensator 5 is provided in the guide cover 2, and air inlet fans 7 corresponding to the guide cover 2 are provided on both sides of the base 6, a confluence bin 8 is provided on the inside of the air inlet fan 7, and a temperature uniformity bin 9 for improving temperature uniformity is provided on the upper side of the confluence bin 8.

[0014] The confluence bin 8 includes two groups of spiral confluence channels 11 starting from the same center. An air inlet pipe 12 corresponding to the air inlet fan 7 is provided on the outside of the confluence channel 11.

[0015] An air inlet 10 corresponding to the converging channel 11 is provided at the bottom center of the uniform temperature chamber 9, and a mixing channel 13 for mixing hot air is provided on the upper side of the air inlet 10. The mixing channel 13 is provided with multiple groups of partitions 15 staggered on the left and right, and multiple groups of spoiler blocks 14 are provided on the partitions 15.

[0016] The temperature compensator 5 is a heating tube with a heating wire.

[0017] Principle of the utility model: This application is a further improvement of the previous application with application number 202122446246.X, entitled A hot air circulation device for a heat treatment furnace for spring processing. During actual use of the patent, it was found that due to the provision of multiple groups of fan blades for supplying air to the tempering furnace body 1, there are differences in the temperature of the hot air blown out by the fan blades, which will affect the workpiece processing effect. The present application sets a base 6 on the lower side of the tempering furnace body 1, and sets a confluence bin 8 and a uniform temperature bin 9 in the base 6, and collects the hot air in the air guide 2 through the confluence bin 8 and flows in the confluence channel 11. The confluence channel 11 is formed by a spiral metal belt, so that the hot air can also exchange heat during the flow along the confluence channel 11, making the temperature more uniform. Finally, the hot air will move upward from the center and enter the uniform temperature bin 9 from the air inlet 10. A mixed flow channel 13 is provided in the uniform temperature bin 9. The mixed flow channel 13 is provided with partitions 15 staggered on the left and right, and a spoiler block 14 is provided on the partition 15, so that the hot air can be further mixed, thereby increasing the hot air mixing effect, so that the temperature of the hot air delivered to the tempering furnace body 1 is more uniform, thereby improving the tempering quality of the workpiece.

Claims

1. A hot air circulation device for improving the temperature uniformity of a tempering furnace, characterized by: The invention comprises a tempering furnace body (1) and a base (6) arranged at the lower side of the tempering furnace body (1); a guide cover (2) is arranged on the outer side of the tempering furnace body (1) and the base (6); a driving motor (3) is arranged at the upper end of the guide cover (2); an output shaft at the lower end of the driving motor (3) is connected to an exhaust fan blade (4) located at the upper end of the tempering furnace body (1); a temperature compensator (5) is arranged inside the guide cover (2); air inlet fans (7) corresponding to the guide cover (2) are arranged on both sides of the base (6); a confluence chamber (8) is arranged inside the air inlet fan (7); and a temperature uniformity chamber (9) for improving temperature uniformity is arranged on the upper side of the confluence chamber (8).

2. The hot air circulation device for improving the temperature uniformity of a tempering furnace according to claim 1, characterized in that: The confluence bin (8) comprises two groups of spiral confluence channels (11) starting from the same center, and an air inlet pipe (12) corresponding to the air inlet fan (7) is provided on the outside of the confluence channel (11).

3. The hot air circulation device for improving the temperature uniformity of a tempering furnace according to claim 1, characterized in that: The center of the bottom of the uniform temperature chamber (9) is provided with an air inlet (10) corresponding to the converging channel (11); a mixing channel (13) for mixing hot air is provided on the upper side of the air inlet (10); a plurality of partitions (15) staggeredly arranged on the left and right are provided in the mixing channel (13); and a plurality of spoiler blocks (14) are provided on the partitions (15).

4. The hot air circulation device for improving the temperature uniformity of a tempering furnace according to claim 1, characterized in that: The temperature compensator (5) is a heating tube with a heating wire.

Images