Radiation type drying furnace

Abstract

The utility model belongs to the technical field of coating drying equipment, and provides a radiation type drying furnace, which comprises a furnace chamber, a plurality of heating mechanisms, a plurality of heating devices and a plurality of heating devices, the heating mechanism comprises a burner arranged on the outer wall of the furnace chamber, a radiant tube laid on the inner wall of the furnace chamber, and a guide pipe sleeve arranged at the end part of the radiant tube; an air outlet of the burner is communicated with an inlet of the radiant tube, and the guide tube sleeve is communicated with an outlet of the radiant tube, so that hot air exhausted by the radiant tube is uniformly diffused in the drying cavity. According to the radiation type drying furnace provided by the utility model, a plurality of heating mechanisms arranged at intervals are adopted, so that sectional type balanced temperature control is realized, heat is uniformly diffused in cooperation with the guide of the guide pipe sleeve to hot air, the temperature in the furnace chamber is rapidly, uniformly and stably increased, the heat conversion rate and the utilization rate are effectively improved, energy is saved, consumption is reduced, and the production cost is reduced. And meanwhile, the drying and curing quality and stability of the coated workpiece are guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of coating drying equipment, in particular to a radiation drying furnace. Background Art

[0002] Currently, coating drying equipment on the market generally uses traditional hot air circulation drying, where the heated hot air enters the drying furnace to dry and solidify the workpiece surface. However, because this method uses a single convection heating method, the temperature in the drying furnace rises slowly, requiring a long time for manual preheating, which seriously affects the efficiency of workpiece drying and curing. The preheating process consumes a lot of energy and wastes resources. At the same time, the existing convection heating method cannot effectively ensure the temperature balance in the drying furnace. The temperature in the drying furnace fluctuates greatly, and the uniformity and stability of the overall heating and drying process are poor, which seriously affects the stability and reliability of the workpiece surface drying and curing quality.

[0003] Therefore, it is necessary to design a radiation drying furnace with rapid heating, balanced temperature, high drying efficiency and good effect. Summary of the Invention

[0004] In order to solve the above technical problems, the utility model proposes a radiation drying furnace, which adopts several temperature-raising mechanisms arranged at intervals to achieve segmented balanced temperature control, and cooperates with the guide pipe sleeve to guide the hot air to make the heat diffuse evenly, ensuring that the temperature in the furnace chamber rises rapidly, evenly and stably, thereby effectively improving the heat conversion rate and utilization rate, saving energy and reducing consumption, and at the same time ensuring the drying and curing quality and stability of the painted workpiece.

[0005] The technical solution of the utility model is:

[0006] The utility model provides a radiation drying furnace, comprising:

[0007] A furnace chamber, wherein the furnace chamber has a built-in drying chamber, and the inner wall of the furnace chamber is provided with a plurality of heating mechanisms evenly spaced along the length direction of the furnace chamber;

[0008] The heating mechanism includes a burner arranged on the outer wall of the furnace chamber, a radiation tube laid on the inner wall of the furnace chamber, and a guide tube sleeve arranged at the end of the radiation tube;

[0009] The air outlet of the burner is connected to the inlet of the radiation tube, and the guide pipe sleeve is connected to the outlet of the radiation tube, so that the hot air discharged from the radiation tube is evenly diffused in the drying chamber.

[0010] Preferably, the guide tube sleeve comprises a tube body portion, an annular edge portion, and a cage portion which are connected in sequence, and the tube body portion is connected to the outlet of the radiation tube;

[0011] The covering portion is in a spherical shell shape and is provided with an air guide port facing the inner wall of the furnace chamber.

[0012] Preferably, a one-way valve is provided inside the tube body so that hot air flows only from the inlet to the outlet of the radiation tube.

[0013] Preferably, the highest position of the air guide port along the radial direction of the radiation tube is lower than the height position of the axis of the radiation tube.

[0014] Preferably, the outer diameter of the annular portion is larger than the maximum outer diameter of the cage portion, so that a flow gap is formed between the air guide port and the inner wall of the furnace chamber;

[0015] The inner wall of the furnace chamber is provided with a support seat, and the radiation tube is mounted above the support seat.

[0016] Preferably, the radiation tube is in the shape of a bent square wave curve, and the radiation tube outlet is arranged in the drying chamber and is located in the middle area in the width direction of the furnace chamber.

[0017] Preferably, the nominal diameter of the radiation tube is between 50 and 280 mm, and under normal working conditions, the outer wall temperature of the radiation tube is between 380° and 420°.

[0018] Preferably, the outer wall of the furnace chamber is provided with a plurality of mounting seats connected thereto, and the burner is fixed above the mounting seats;

[0019] The mounting seat includes a left clamping seat and a right clamping seat that are symmetrically arranged, and a limiting plate that is mounted between the left clamping seat and the right clamping seat.

[0020] Preferably, the left clamping seat and the right clamping seat are both provided with a back plate connected to the outer wall of the furnace chamber, and a side plate vertically connected to the back plate;

[0021] The back plate is provided with a fixing through hole adapted to the radiation tube, and the side plate is provided with a horizontal supporting plate and an inclined rib plate located on the inner side, and the rib plate is located below the supporting plate.

[0022] Preferably, an adjustment hole is provided at one end of the support plate away from the back plate, and both ends of the limit plate are respectively arranged at the positions of the adjustment holes of the left clamp seat and the right clamp seat so as to be movable forward and backward.

[0023] Compared with the prior art, the present invention has the following advantages and effects:

[0024] (1) Using several heating mechanisms evenly spaced to achieve segmented balanced temperature control, improving the heating efficiency in the furnace while ensuring the uniformity and stability of the heating in the furnace, thereby ensuring the curing quality and stability of the surface of the coated workpiece;

[0025] (2) The guide tube sleeve arranged at the end of the radiation tube can reasonably and effectively guide and rectify the hot air discharged from the outlet of the radiation tube, so that the hot air can be evenly diffused from the edge of the inner wall of the furnace chamber to the inside, and the temperature in the furnace chamber can be heated synchronously by combining radiation and convection, thereby improving the heating efficiency and heat utilization efficiency and enhancing the balance of the furnace temperature;

[0026] (3) The burner bracket can be firmly fixed on the outer wall of the furnace chamber by using a mounting base including a left clamping base, a right clamping base and a limit plate. The left clamping base and the right clamping base, which are independently and symmetrically arranged, can be adjusted to the installation position according to the different models and specifications of the burners, so as to adapt to different burners and meet different production needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic structural diagram of the radiation drying furnace in Example 1 of the present utility model;

[0028] Figure 2 for Figure 1 Schematic diagram of the enlarged structure at position A in the middle;

[0029] Figure 3 This is a schematic structural diagram of a mounting base in a radiation drying furnace in Example 1 of the present utility model;

[0030] Figure 4 This is a schematic diagram of the internal structure of the radiation drying furnace in Example 1 of the present utility model;

[0031] Figure 5 for Figure 4 Schematic diagram of the enlarged structure at position B in the middle;

[0032] Figure 6 This is a structural schematic diagram of the guide pipe sleeve in the radiation drying furnace in Example 1 of the present utility model.

[0033] Figure numerals: 1. furnace chamber; 2. burner; 3. radiation tube; 4. guide pipe sleeve; 41. tube body; 411. one-way valve; 42. ring edge; 43. cover; 431. air guide port; 5. mounting seat; 51. left clamping seat; 52. right clamping seat; 53. limit plate; 6. back plate; 61. fixing through hole; 7. side plate; 71. support plate; 711. adjustment hole; 72. rib plate. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in conjunction with specific implementation methods.

[0035] Example 1:

[0036] like Figures 1 to 6As shown, the utility model provides a radiation drying furnace, which includes a furnace chamber 1 and a conveying mechanism arranged in the furnace chamber 1. It should be noted that the conveying mechanism can be a lifting mechanism or a conveyor belt mechanism. In view of the fact that it is a mature existing technology, it will not be described here.

[0037] Combine Figure 1 、 Figure 4 As shown, the furnace chamber 1 has a built-in drying chamber, and a plurality of heating mechanisms are installed on the inner wall of the furnace chamber 1. The heating mechanisms are evenly spaced along the length of the furnace chamber 1 and are installed at intervals on the bottom wall of the furnace chamber 1. It should be noted that the length of the furnace chamber 1 is the same as the direction of conveyance of the workpiece. In this embodiment, the heating mechanisms are installed at intervals on the bottom wall of the furnace chamber 1, but the heating mechanisms can also be installed on the side walls of the furnace chamber 1, or on both the bottom wall and the side walls of the furnace chamber 1.

[0038] like Figure 1 、 Figure 4 As shown, the heating mechanism includes a burner 2 arranged on the outer wall of the furnace chamber 1, a radiation tube 3 laid on the inner wall of the furnace chamber 1, and a guide tube sleeve 4 arranged at the end of the radiation tube 3. Figure 2 As shown, the air outlet of the burner 2 is connected to the inlet of the radiation tube 3. Figure 5 As shown, the guide pipe sleeve 4 is connected to the outlet of the radiation tube 3 so that the hot air discharged from the outlet of the radiation tube 3 can be evenly diffused in the drying chamber.

[0039] Combine Figure 2 、 Figure 3 As shown, the outer wall of the furnace chamber 1 is provided with a plurality of detachably connected mounting bases 5, and the burner 2 is fixed on top of the mounting bases 5. The mounting base 5 includes a symmetrically arranged left clamping base 51 and a right clamping base 52, and a limit plate 53 mounted between the left clamping base 51 and the right clamping base 52. The left clamping base 51 and the right clamping base 52 are two independent clamping bases arranged opposite each other. By adjusting the distance between the left clamping base 51 and the right clamping base 52, they can be adapted to burners 2 of different specifications and models, thereby improving the stability and reliability of the support for the burner 2.

[0040] The left clamp seat 51 and the right clamp seat 52 are both provided with a back plate 6 connected to the outer wall of the furnace chamber 1, and a side plate 7 vertically connected to the back plate 6; the back plate 6 is provided with a fixing through hole 61 adapted to the radiation tube 3, so that the radiation tube 3 is connected to the air outlet of the burner 2, and the side plate 7 is provided with a horizontal support plate 71 and an inclined rib plate 72 located on the inner side. The support plates 71 and the rib plates 72 of the left clamp seat 51 and the right clamp seat 52 are arranged relatively to each other, and the rib plate 72 is located below the support plate 71, and it forms a triangular bracket structure with the support plate 71 and the back plate 6. The limit plate 53 is provided at the end of the support plate 71 away from the back plate 6.

[0041] like Figure 3As shown, an adjustment hole 711 is provided at one end of the support plate 71 away from the back plate 6, and the limiting plate 53 is provided with the adjustment hole 711 so that it can move forward and backward. Specifically, the limiting plate 53 is provided with a fastening bolt. By adjusting the front and rear positions of the limiting plate 53, it is abutted against the front side of the burner 2, thereby limiting the movement of the burner 2 in the front and rear directions.

[0042] Combine Figure 4 、 Figure 5 As shown, the radiation tube 3 is in the shape of a bent square wave curve. The outlet of the radiation tube 3 is located in the drying chamber of the furnace chamber 1, and is located in the middle area in the width direction of the furnace chamber 1 to promote the uniform diffusion of the hot air discharged from the outlet of the radiation tube 3 to the surroundings, thereby making the temperature in the furnace rise more uniformly and rapidly.

[0043] The nominal diameter of the radiant tube 3 is between 50 and 280 mm, and is specifically set according to the size of the furnace chamber 1 and the power of the burner 2 to ensure the highest heat radiation efficiency. Under normal operating conditions, the outer wall temperature of the radiant tube 3 is between 380° and 420°. The radiant tube 3 can specifically be an aluminized low-carbon seamless steel radiant tube 3, or a ceramic radiant tube 3 (SiC), etc. Under normal operating conditions, the outer wall temperature of the radiant tube 3 is between 380° and 420°, with a high heat conversion rate. At the same time, the flame temperature is maintained between 380° and 420°C, effectively eliminating the generation of nitrogen oxides (the generation of nitrogen oxides requires a high temperature of more than 950°C). No pollutants are generated, and the investment and operating costs of subsequent denitrification and environmental protection equipment are saved, thereby achieving the effects of cost saving, efficiency improvement, energy reduction and consumption reduction.

[0044] like Figure 5 、 Figure 6 As shown, the guide tube sleeve 4 includes a tube body portion 41, an annular edge portion 42, and a cover portion 43 connected in sequence. The tube body portion 41, the annular edge portion 42, and the cover portion 43 are all connected to the radiation tube 3. The tube body portion 41 is connected to the outlet of the radiation tube 3. The cover portion 43 is spherical and is provided with an air guide port 431 facing the inner wall of the furnace chamber 1.

[0045] refer to Figure 6 As shown, a one-way valve 411 is provided within the tube body 41 to allow hot air to flow only from the inlet to the outlet of the radiant tube 3, ultimately flowing into the drying chamber through the air guide port 431. This prevents hot air in the drying chamber from being diverted into the radiant tube 3, causing turbulence within the radiant tube 3 and leading to localized high-temperature burns of the radiant tube 3. Specifically, the one-way valve 411 includes a support provided within the tube body 41 and a valve fan movably connected to the support. The valve fan is adapted to the tube body 41 and can only be opened when hot air is blowing from the inlet to the outlet of the radiant tube 3. When no hot air is blowing, the valve fan automatically closes to prevent hot air in the drying chamber from flowing back into the radiant tube 3.

[0046] The highest position of the air guide port 431 along the radial direction of the radiation tube 3 is lower than the height position of the axis of the radiation tube 3, so that the hot air blown out from the outlet of the radiation tube 3 is guided downward through the cover portion 43, and finally blown toward the inner wall of the furnace chamber 1 through the air guide port 431 and diffused to the surroundings.

[0047] Combine Figure 5 、 Figure 6 As shown, the outer diameter of the annular portion 42 is larger than the maximum outer diameter of the covering portion 43, so that there is a hot air diversion and diffusion gap between the air guide port 431 and the inner wall of the furnace chamber 1, which promotes the hot air to diffuse around through the air guide port 431, thereby improving the heat utilization rate and the uniformity of heating and temperature rise.

[0048] Optionally, in some embodiments, a support base (not shown in the figures) is provided on the bottom wall of the furnace chamber 1 , and the radiation tube 3 is mounted above the support base.

[0049] To sum up, the radiation drying furnace provided by the utility model adopts several temperature-raising mechanisms arranged at intervals to achieve segmented balanced temperature control, and cooperates with the guide pipe sleeve to guide the hot air to make the heat diffuse evenly, ensuring that the temperature in the furnace chamber rises rapidly, evenly and stably, thereby effectively improving the heat conversion rate and utilization rate, saving energy and reducing consumption, and at the same time ensuring the drying and curing quality and stability of the painted workpiece.

[0050] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. All equivalent changes and modifications made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. A radiation drying furnace, characterized in that: include: A furnace chamber (1), wherein the furnace chamber (1) has a built-in drying chamber, and the inner wall of the furnace chamber (1) is provided with a plurality of heating mechanisms evenly spaced and distributed along the length direction of the furnace chamber (1); The heating mechanism comprises a burner (2) arranged on the outer wall of the furnace chamber (1), a radiation tube (3) laid on the inner wall of the furnace chamber (1), and a guide tube sleeve (4) arranged at the end of the radiation tube (3); The air outlet of the burner (2) is connected to the inlet of the radiation tube (3), and the guide pipe sleeve (4) is connected to the outlet of the radiation tube (3), so that the hot air discharged from the radiation tube (3) is evenly diffused in the drying chamber.

2. The radiation drying furnace according to claim 1, characterized in that: The guide tube sleeve (4) comprises a tube body portion (41), an annular edge portion (42), and a cage portion (43) connected in sequence, wherein the tube body portion (41) is connected to the outlet of the radiation tube (3); The covering portion (43) is in the shape of a spherical shell and is provided with an air guide port (431) facing the inner wall of the furnace chamber (1).

3. The radiation drying furnace according to claim 2, characterized in that: A one-way valve (411) is provided inside the tube body (41) to allow hot air to flow only from the inlet to the outlet of the radiation tube (3).

4. The radiation drying furnace according to claim 2, characterized in that: The highest position of the air guide port (431) along the radial direction of the radiation tube (3) is lower than the height position of the axis of the radiation tube (3).

5. The radiation drying furnace according to claim 2, characterized in that: The outer diameter of the annular portion (42) is greater than the maximum outer diameter of the cage portion (43), so that a flow gap is formed between the air guide port (431) and the inner wall of the furnace chamber (1); The inner wall of the furnace chamber (1) is provided with a support seat, and the radiation tube (3) is mounted above the support seat.

6. The radiation drying furnace according to claim 1, characterized in that: The radiation tube (3) is in the shape of a bent square wave curve, and the outlet of the radiation tube (3) is arranged in the drying cavity and is located in the middle area in the width direction of the furnace chamber (1).

7. The radiation drying furnace according to claim 1, characterized in that: The nominal diameter of the radiation tube (3) is between 50 and 280 mm, and under normal working conditions, the outer wall temperature of the radiation tube (3) is between 380° and 420°.

8. The radiation drying furnace according to claim 1, characterized in that: The outer wall of the furnace chamber (1) is provided with a plurality of mounting seats (5) connected thereto, and the burner (2) is fixed above the mounting seats (5); The mounting seat (5) comprises a symmetrically arranged left clamping seat (51) and a right clamping seat (52), and a limiting plate (53) mounted between the left clamping seat (51) and the right clamping seat (52).

9. The radiation drying furnace according to claim 8, characterized in that: The left clamping seat (51) and the right clamping seat (52) are both provided with a back plate (6) connected to the outer wall of the furnace chamber (1), and a side plate (7) vertically connected to the back plate (6); The back plate (6) is provided with a fixing through hole (61) adapted to the radiation tube (3), and the side plate (7) is provided with a horizontal support plate (71) and an inclined rib plate (72) located on the inner side, and the rib plate (72) is located below the support plate (71).

10. The radiation drying furnace according to claim 9, characterized in that: An adjustment hole (711) is provided at one end of the support plate (71) away from the back plate (6), and both ends of the limit plate (53) are respectively arranged at the positions of the adjustment holes (711) of the left clamping seat (51) and the right clamping seat (52) so as to be movable forward and backward.

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