Air nozzle, drying oven and double-layer drying oven

Abstract

The utility model discloses an air nozzle, a drying oven and a double-layer drying oven. The air nozzle comprises a shell, a main air inlet and a main air outlet, the first air uniformizing plate is arranged in the shell and divides the interior of the shell into a pressure regulating cavity and a first cavity; the main air inlet is communicated with the pressure regulating cavity, and the main air outlet is communicated with the first cavity; the cross-sectional area of the pressure regulating cavity close to the total air inlet is larger than the cross-sectional area away from the total air inlet, a plurality of first ventilation holes are formed in the first air uniformizing plate, and the density of the first ventilation holes close to the total air inlet is smaller than that of the first ventilation holes away from the total air inlet; and / or the aperture of the first ventilation hole close to the total air inlet is smaller than that of the first ventilation hole far away from the total air inlet. According to the technical scheme provided by the invention, through the first air uniformizing plate and the pressure regulating cavity, the pressure intensities of the hot flow gas flowing out of the main air outlet are the same or similar, and the situation that the pole piece is damaged due to the fact that the blown air pressure is different is avoided.

Description

Technical Field

[0001] The present application belongs to the technical field of coating ovens, and in particular to an air nozzle, an oven and a double-layer oven. Background Art

[0002] The coating oven is used to dry the electrode coated with slurry, and the drying of the electrode coating layer is usually achieved by outputting hot air flow through an air nozzle.

[0003] In the prior art, after the hot air flows into the air nozzle, the air pressure inside the air nozzle near the air inlet is usually greater than the air pressure at other locations inside the air nozzle, resulting in unstable air pressure inside the air nozzle and unstable air pressure of the gas flowing out of the air outlet, which can easily cause the electrode to vibrate, thereby affecting the quality of electrode baking. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a tuyere, an oven and a double-layer oven.

[0005] According to a first aspect of an embodiment of the present application, there is provided a nozzle, comprising:

[0006] A shell body, wherein a main air outlet and a main air inlet are provided on the shell body;

[0007] a first air balancing plate, which is disposed inside the housing and divides the interior of the housing into a pressure regulating chamber and a first chamber; the total air inlet is communicated with the pressure regulating chamber, and the total air outlet is communicated with the first chamber;

[0008] The cross-sectional area of ​​the pressure regulating chamber close to the main air inlet is larger than the cross-sectional area away from the main air inlet, a plurality of first ventilation holes are provided on the first air balancing plate, and the density of the first ventilation holes close to the main air inlet is smaller than the density of the first ventilation holes away from the main air inlet; and / or

[0009] The aperture of the first ventilation hole close to the main air inlet is smaller than the aperture of the first ventilation hole far from the main air inlet.

[0010] Optionally, a second air balancing plate is provided in the first chamber, and a second ventilation hole is opened on the second air balancing plate.

[0011] Optionally, a diameter of the second ventilation hole is smaller than a diameter of the first ventilation hole.

[0012] Optionally, the second air equalizing plate divides the first chamber into a second chamber and a third chamber, the third chamber is connected to the main air outlet, and the second chamber is connected to the third chamber through the second ventilation hole.

[0013] Optionally, a return air channel is provided in the third chamber, an outer wall of the return air channel and an inner wall of the shell form a guide channel, and the guide channel is connected to the main air outlet.

[0014] Optionally, the shell is provided with a return air outlet hole and a return air inlet hole, and the return air inlet hole and the return air outlet hole are both connected to the return air channel.

[0015] Optionally, the guide channel includes a first sub-guide channel and a second sub-guide channel, and the main air outlet includes a first air outlet and a second air outlet;

[0016] The housing comprises a first inclined plate and a second inclined plate, the first inclined plate and the second inclined plate are inclined in a direction close to each other, the first inclined plate and the outer wall of the return air channel form the first sub-guiding channel, and the second inclined plate and the outer wall of the return air channel form the second sub-guiding channel;

[0017] The first air outlet is communicated with the first sub-guiding channel, and the second air outlet is communicated with the second sub-guiding channel.

[0018] Optionally, the extension line of the outlet of the first sub-guiding channel intersects with the extension line of the outlet of the second sub-guiding channel; the axis of the return air inlet hole intersects with the extension line of the outlet of the first sub-guiding channel and / or the extension line of the outlet of the second sub-guiding channel.

[0019] According to a second aspect of an embodiment of the present application, there is provided an oven, comprising a box body and a plurality of the above-mentioned air nozzles, wherein the air nozzles are arranged inside the box body and fixed on the inner wall of the box body.

[0020] Optionally, the oven further includes an air inlet pipe, the inner diameter of which gradually decreases along the gas flow direction, the air inlet pipe is fixed on the box body, each of the air nozzles is connected to the air inlet pipe, and a plurality of the air nozzles are arranged at intervals along the length direction of the air inlet pipe.

[0021] Optionally, the oven further comprises a plurality of air inlet branch pipes, wherein the air inlet pipes are arranged outside the box body and fixed on the outer wall of the box body, and one end of each of the air inlet branch pipes is connected to the air inlet pipe, and the other end is connected to the main air inlet of the corresponding air nozzle.

[0022] Optionally, the plurality of air nozzles form a first exhaust nozzle group and a second exhaust nozzle group inside the box, the first exhaust nozzle group is close to the top wall of the box, the second exhaust nozzle group is close to the bottom wall of the box, and the first exhaust nozzle group and the second exhaust nozzle group are staggered.

[0023] Optionally, the box body is provided with a tape inlet and a tape outlet, a tape walking channel is formed between the first exhaust nozzle group and the second exhaust nozzle group, and the tape inlet and the tape outlet are both connected to the tape walking channel.

[0024] Optionally, the oven further comprises a throttle valve, and the throttle valve is arranged on the air inlet branch pipe.

[0025] Optionally, the oven further comprises an exhaust passage, the box body is provided with an exhaust port, and the exhaust passage is communicated with the exhaust port.

[0026] According to a third aspect of an embodiment of the present application, a double-layer oven is provided, comprising two of the above-mentioned ovens, wherein the two ovens are an upper oven and a lower oven, respectively, the upper oven and the lower oven are stacked, the exhaust duct of the upper oven is located at the top of the box body of the upper oven, and the exhaust duct of the lower oven is located at the bottom of the box body of the lower oven.

[0027] Optionally, the double-layer oven further comprises a return traction device;

[0028] The return traction device is arranged outside the upper oven and adjacent to the outlet of the upper oven. After the pole piece passes through the upper oven, it enters the lower oven through the return traction device; or

[0029] The return traction device is arranged outside the lower oven and adjacent to the outlet of the lower oven. After passing through the lower oven, the pole piece enters the upper oven through the return traction device.

[0030] A technical effect of an embodiment of the present application is that the pressure of the hot flow gas entering the interior of the shell is adjusted through the first air balancing plate and the pressure regulating chamber, so that the pressure of the hot flow gas flowing out of the total air outlet is the same or similar, thereby avoiding damage to the pole piece due to different blown wind pressures.

[0031] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0033] Figure 1 It is a schematic diagram of the structure of the air nozzle in the embodiment of the present application;

[0034] Figure 2 It is a schematic diagram of the structure of the air nozzle in the embodiment of the present application;

[0035] Figure 3 for Figure 2 Sectional view at AA in the middle;

[0036] Figure 4 for Figure 2 Sectional view at the middle BB;

[0037] Figure 5 for Figure 4 A partial enlarged view of the middle A;

[0038] Figure 6 for Figure 4 A partial enlarged view of point B in the middle;

[0039] Figure 7 It is a schematic diagram of the structure of the air nozzle in the embodiment of the present application;

[0040] Figure 8 for Figure 7 Sectional view at CC;

[0041] Fig. 9 for Figure 8 A partial enlarged view of point C in the middle;

[0042] Fig.10 It is a schematic diagram of the structure of the oven in the embodiment of the present application;

[0043] Fig.11 is a cross-sectional view of an oven in an embodiment of the present application;

[0044] Fig.12 It is a schematic diagram of the structure of a double-layer oven in an embodiment of the present application;

[0045] Fig.13 It is a partial cross-sectional view of a double-layer oven in an embodiment of the present application;

[0046] Fig.14 It is a schematic diagram of the position structure of the oven, the first coating mechanism and the second coating mechanism in the embodiment of the present application;

[0047] Fig.15 It is a schematic diagram of the position structure of the double-layer oven, the first coating mechanism, the second coating mechanism and the return traction device in the embodiment of the present application;

[0048] Fig.16 It is a schematic diagram of the position structure of the double-layer oven, the first coating mechanism, the second coating mechanism and the return traction device in the embodiment of the present application.

[0049] Description of reference numerals:

[0050] Nozzle 100; housing 1; main air inlet 11; main air outlet 12; first air outlet 121; second air outlet 122; first chamber 13; second chamber 131; third chamber 132; pressure regulating chamber 14; guide channel 15; first sub-guide channel 151; second sub-guide channel 152; first inclined plate 16; second inclined plate 17; first air balancing plate 2; first ventilation hole 21; second air balancing plate 3; second Ventilation hole 31; return air channel 4; return air inlet hole 41; return air outlet hole 42; oven 200; box body 5; belt inlet 51; belt outlet 52; belt walking channel 53; air inlet pipe 6; air inlet branch pipe 7; throttle valve 8; exhaust channel 9; roller 10; double-layer oven 300; upper oven 301; lower oven 302; return traction device 303; first coating mechanism 400; second coating mechanism 500. DETAILED DESCRIPTION

[0051] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0052] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0053] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0054] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0055] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0056] like Figure 1-Figure 9As shown, according to the first aspect of an embodiment of the present application, a wind nozzle 100 is provided, comprising: a shell 1 and a first air balancing plate 2, the shell 1 being provided with a total air outlet 12 and a total air inlet 11; the first air balancing plate 2 is arranged inside the shell 1, and divides the interior of the shell 1 into a pressure regulating chamber 14 and a first chamber 13; the total air inlet 11 is connected to the pressure regulating chamber 14, and the total air outlet 12 is connected to the first chamber 13; the cross-sectional area of ​​the pressure regulating chamber 14 close to the total air inlet 11 is larger than the cross-sectional area away from the total air inlet 11, a plurality of first ventilation holes 21 are provided on the first air balancing plate 2, the density of the first ventilation holes 21 close to the total air inlet 11 is less than the density of the first ventilation holes 21 away from the total air inlet 11; and or the aperture of the first ventilation holes 21 close to the total air inlet 11 is smaller than the aperture of the first ventilation holes 21 away from the total air inlet 11.

[0057] like Figure 1-Figure 3 As shown, the air nozzle 100 includes a shell 1 and a first air distribution plate 2. The shell 1 is a hollow structure, and a main air outlet 12 and a main air inlet 11 are provided on the shell 1. A gas flow channel is formed inside the shell 1. The main air outlet 12 faces the electrode to be baked. The hot gas flows into the shell 1 from the main air inlet 11 and flows out from the main air outlet 12 to bake the electrode.

[0058] like Figure 3 As shown, the first air balancing plate 2 is arranged inside the shell 1 to divide the inside of the shell 1 into a first chamber 13 and a pressure regulating chamber 14. The first chamber 13 is connected to the main air outlet 12, and the pressure regulating chamber 14 is connected to the main air inlet 11. A first ventilation hole 21 is provided on the first air balancing plate 2, and the first chamber 13 and the pressure regulating chamber 14 are connected through the first ventilation hole 21. The hot flow gas enters the pressure regulating chamber 14 through the main air inlet 11, and the pressure regulating chamber 14 and the first ventilation hole 21 of the first air balancing plate 2 work together to balance the pressure of the hot flow gas entering the pressure regulating chamber 14. The hot flow gas enters the first chamber 13 through the first ventilation hole 21 and flows out through the main air outlet 12 to bake the electrode.

[0059] When the hot flow gas flows into the pressure regulating chamber 14 through the main air inlet 11, the pressure near the main air inlet 11 in the pressure regulating chamber 14 will be greater than the pressure far away from the main air inlet 11; the cross-sectional area of ​​the pressure regulating chamber 14 close to the main air inlet 11 is larger than the cross-sectional area far away from the main air inlet 11, so that the pressure near the main air inlet 11 in the pressure regulating chamber 14 is the same as or similar to the pressure far away from the main air inlet 11, thereby achieving the function of adjusting the internal wind pressure of the shell 1, so that the wind pressure at various locations inside the shell 1 is balanced.

[0060] like Figure 7 and Figure 8As shown, in one embodiment, a plurality of first ventilation holes 21 are provided on the first air balancing plate 2, and the apertures of the first ventilation holes 21 at different positions on the first air balancing plate 2 are the same, and the density of the first ventilation holes 21 of the first air balancing plate 2 close to the main air inlet 11 is less than the density of the first ventilation holes 21 far from the main air inlet 11. Since the pressure near the main air inlet 11 in the pressure regulating chamber 14 is greater than the pressure far from the main air inlet 11, in this embodiment, by setting first ventilation holes 21 of different densities on the first air balancing plate 2, the pressure of the hot flow gas passing through the first air balancing plate 2 is balanced, so that the pressure of the hot flow gas entering the first chamber 13 is the same or similar.

[0061] In another embodiment, a plurality of first ventilation holes 21 with different apertures are provided on the first air equalizing plate 2, and the density of the first ventilation holes 21 at different positions on the first air equalizing plate 2 is the same, and the aperture of the first ventilation holes 21 of the first air equalizing plate 2 close to the main air inlet 11 is smaller than the aperture of the first ventilation holes 21 far from the main air inlet 11, and the aperture of the first ventilation holes 21 gradually decreases from one end of the first air equalizing plate 2 close to the main air inlet 11 to the end far from the main air inlet 11. In this embodiment, by providing first ventilation holes 21 with different apertures on the first air equalizing plate 2, the pressure of the hot flow gas passing through the first air equalizing plate 2 is balanced, so that the pressure of the hot flow gas entering the first chamber 13 is the same or similar.

[0062] In another embodiment, a plurality of first ventilation holes 21 with different apertures are provided on the first air equalizing plate 2, the density of the first ventilation holes 21 of the first air equalizing plate 2 close to the main air inlet 11 is smaller than the density of the first ventilation holes 21 far from the main air inlet 11, the aperture of the first ventilation holes 21 of the first air equalizing plate 2 close to the main air inlet 11 is smaller than the aperture of the first ventilation holes 21 far from the main air inlet 11, and the aperture of the first ventilation holes 21 gradually decreases from one end of the first air equalizing plate 2 close to the main air inlet 11 to the end far from the main air inlet 11. In this embodiment, by providing first ventilation holes 21 with different apertures and different densities on the first air equalizing plate 2, the pressure of the hot flow gas passing through the first air equalizing plate 2 is balanced, so that the pressure of the hot flow gas entering the first chamber 13 is the same or similar.

[0063] In the above-mentioned embodiments, the first air equalizing plate 2 and the pressure regulating chamber 14 can be used to adjust the pressure of the hot flow gas entering the interior of the shell 1, so that the pressure of the hot flow gas flowing out of the total air outlet 12 is the same or similar, thereby avoiding damage to the pole piece due to different blown wind pressures.

[0064] In an optional embodiment, a second air balancing plate 3 is disposed in the first chamber 13 , and a second ventilation hole 31 is formed on the second air balancing plate 3 . The aperture of the second ventilation hole 31 is smaller than the aperture of the first ventilation hole 21 .

[0065] like Figure 3 As shown, a second air balancing plate 3 is provided in the first chamber 13, and a second ventilation hole 31 is opened on the second air balancing plate 3. After the hot gas enters the first chamber 13, it passes through the second air balancing plate 3 to further balance the wind pressure inside the housing 1, so that the pressure of the hot gas flowing out of the total air outlet 12 is the same or similar, avoiding damage to the pole piece due to different wind pressures.

[0066] Further explanation, such as Figure 7 As shown, in an embodiment where the apertures of the first ventilation holes 21 on the first air equalizing plate 2 are the same, the apertures of the second ventilation holes 31 are smaller than the apertures of the first ventilation holes 21. After the hot flow gas passes through the second air equalizing plate 3, the pressure of the hot flow gas flowing out of the total air outlet 12 can be increased, and the wind pressure can also be further balanced.

[0067] To further illustrate, in an embodiment where the apertures of the first ventilation holes 21 on the first air equalizing plate 2 are different, the second ventilation holes 31 are smaller than the minimum aperture of the first ventilation holes 21 .

[0068] In an optional embodiment, the second air equalizing plate 3 divides the first chamber 13 into a second chamber 131 and a third chamber 132 , the third chamber 132 is connected to the main air outlet 12 , and the second chamber 131 is connected to the third chamber 132 through the second ventilation hole 31 .

[0069] like Figure 3 and Figure 4 As shown, the second air balancing plate 3 divides the first chamber 13 into a second chamber 131 and a third chamber 132. The second chamber 131 and the third chamber 132 are connected through the second ventilation hole 31, and the third chamber 132 is connected to the main air outlet 12. The hot gas enters the second chamber 131 after passing through the first air balancing plate 2 to balance the wind pressure in the pressure regulating chamber 14, enters the third chamber 132 after passing through the second air balancing plate 3 to balance the wind pressure, and finally flows out through the main air outlet 12 to bake the electrode.

[0070] In an optional implementation, a return air channel 4 is provided in the third chamber 132 , an outer wall of the return air channel 4 and an inner wall of the shell 1 form a guide channel 15 , and the guide channel 15 is connected to the main air outlet 12 .

[0071] like Figure 4 As shown, a return air channel 4 is provided in the third chamber 132 , and the hot flow gas blown out from the main air outlet 12 flows into the return air channel 4 and is recovered through the return air channel 4 .

[0072] Further explanation: the return air channel 4 is formed by a tubular thin-walled shell, and the return air channel 4 is arranged in the third chamber 132. A guide channel 15 is formed between the outer wall of the tubular thin-walled shell of the return air channel 4 and the inner wall of the shell 1. The guide channel 15 is connected to the main air outlet 12, so the hot gas entering the third chamber 132 will flow out from the main air outlet 12 after passing through the guide channel 15. The guide channel 15 is formed between the tubular thin-walled shell of the return air channel 4 and the shell 1, and the guide channel 15 can be formed without setting up other additional pipes, thereby saving the internal space of the air nozzle 100; and the hot gas flows along the guide channel 15 to the main air outlet 12, so that the hot gas can bake the electrode.

[0073] In an optional embodiment, the shell 1 is provided with a return air outlet hole 42 and a return air inlet hole 41 , and the return air inlet hole 41 and the return air outlet hole 42 are both connected to the return air channel 4 .

[0074] like Figure 7 As shown, the housing 1 is provided with a return air outlet hole 42 and a return air inlet hole 41, and the return air inlet hole 41 and the return air outlet hole 42 are both connected to the return air channel 4, and the hot flow gas blown out from the total air outlet 12 flows back to the return air channel 4 through the return air inlet hole 41, and flows out from the return air outlet hole 42 after passing through the return air channel 4. The total air outlet 12 and the return air inlet hole 41 are arranged adjacent to each other, so as to avoid excessive air pressure at the total air outlet 12, and play a role in balancing the air pressure of the total air outlet 12. And the return air inlet hole 41 can also play a role in pressure relief.

[0075] In an optional embodiment, the guide channel 15 includes a first sub-guide channel 151 and a second sub-guide channel 152, and the main air outlet 12 includes a first air outlet 121 and a second air outlet 122;

[0076] The housing 1 includes a first inclined plate 16 and a second inclined plate 17, the first inclined plate 16 and the second inclined plate 17 are inclined in a direction close to each other, the first inclined plate 16 and the outer wall of the return air channel 4 form the first sub-guiding channel 151, and the second inclined plate 17 and the outer wall of the return air channel 4 form the second sub-guiding channel 152;

[0077] The first air outlet 121 is in communication with the first sub-guiding channel 151 , and the second air outlet 122 is in communication with the second sub-guiding channel 152 .

[0078] like Figure 4 , Figure 5 and 6 As shown, the guide channel 15 includes a first sub-guide channel 151 and a second sub-guide channel 152 ; the main air outlet 12 includes a first air outlet 121 and a second air outlet 122 .

[0079] Among them, the shell 1 includes a first inclined plate 16 and a second inclined plate 17, the first inclined plate 16 and the second inclined plate 17 are inclined in the direction of approaching each other, the tubular thin-walled shell of the return air channel 4 and the first inclined plate 16 form a first sub-guide channel 151, the tubular thin-walled shell of the return air channel 4 and the second inclined plate 17 form a second sub-guide channel 152, the first sub-guide channel 151 is connected to the first air outlet 121, the second sub-guide channel 152 and the second air outlet 122 are connected, the hot flow gas is diverted in the third chamber 132, part of the hot flow gas is blown out through the first sub-guide channel 151 and the first air outlet 121, and part of the hot flow gas is blown out through the second sub-guide channel 152 and the second air outlet 122, and the hot flow gas blown out from the first air outlet 121 and the second air outlet 122 is blown in the direction of the pole piece to bake the pole piece. If only one air outlet is provided, the electrode may be partially baked, resulting in uneven baking of the electrode. The first air outlet 121 and the second air outlet 122 are provided to improve the uniformity of baking the electrode.

[0080] In an optional embodiment, the extension line of the outlet of the first sub-guide channel 151 intersects with the extension line of the outlet of the second sub-guide channel 152, and the axis of the return air inlet hole 41 intersects with the extension line of the outlet of the first sub-guide channel 151 and / or the extension line of the outlet of the second sub-guide channel 152.

[0081] like Fig. 9 As shown, the extension line of the outlet of the first sub-guiding channel 151 toward the outside of the shell 1 intersects with the extension line of the outlet of the second sub-guiding channel 152 toward the outside of the shell 1, and the intersection is located outside the shell 1. The axis of the return air inlet hole 41 extends toward the outside of the shell 1; in one embodiment, the axis of the return air inlet hole 41, the extension line of the outlet of the first sub-guiding channel 151, and the extension line of the outlet of the second sub-guiding channel 152 intersect at one point. In this embodiment, after the hot flow gas flowing out of the first sub-guiding channel 151 and the hot flow gas flowing out of the second sub-guiding channel 152 bake the electrode, it is convenient to enter the return air channel 4 through the return air inlet hole 41, and the speed of entering the return air channel 4 is faster. In another embodiment, the axis of the return air inlet hole 41 intersects with the extension line of the outlet of the first sub-guiding channel 151 at one point, and the axis of the return air inlet hole 41 intersects with the extension line of the outlet of the second sub-guiding channel 151 at another point, so that the hot flow gas flowing out of the first sub-guiding channel 151 and the hot flow gas flowing out of the second sub-guiding channel 152 can enter the return air channel 4 through the return air inlet hole 41 after baking the electrode piece. In this embodiment, although the rate of the hot flow gas entering the return air channel 4 is not as fast as when the three intersect at one point, the installation accuracy and processing accuracy requirements of the first inclined plate 16, the second inclined plate 17 and the return air channel 4 are relatively low. The above two embodiments can be selected as needed.

[0082] In one embodiment, the first sub-guide channel 151 and the second sub-guide channel 152 are arc-shaped; the extension line of the outlet of the first sub-guide channel 151 can be understood as a line connecting any point in the first sub-guide channel 151 and the center line of the outlet and extending to the outside of the shell 1; the extension line of the outlet of the second sub-guide channel 152 can be understood as a line connecting any point in the second sub-guide channel 152 and the center line of the outlet and extending to the outside of the shell 1.

[0083] In one embodiment, the first sub-guiding channel 151 and the second sub-guiding channel 152 are S-shaped; the extension line of the first sub-guiding channel 151 can be understood as a line connecting any point in the first sub-guiding channel 151 and the center line of the outlet and extending to the outside of the shell 1; the extension line of the outlet of the second sub-guiding channel 152 can be understood as a line connecting any point in the second sub-guiding channel 152 and the center line of the outlet and extending to the outside of the shell 1.

[0084] In one embodiment, the first sub-guiding channel 151 and the second sub-guiding channel 152 are linear; the extension line of the outlet of the first sub-guiding channel 151 can be understood as the extension of the first sub-guiding channel 151 to the outside of the shell 1; the extension line of the outlet of the second sub-guiding channel 152 can be understood as the extension of the second sub-guiding channel 152 to the outside of the shell 1.

[0085] like Figure 10-13 As shown, according to the second aspect of the embodiment of the present application, there is provided an oven 200, comprising a plurality of the above-mentioned air nozzles 100 and a box body 5, wherein the air nozzles 100 are arranged inside the box body 5 and fixed to the inner wall of the box body 55. The oven 200 further comprises an air inlet pipe 6, the inner diameter of which gradually decreases along the gas flow direction, the air inlet pipe 6 is fixed to the box body 5, each of the air nozzles 100 is connected to the air inlet pipe 6, and the plurality of air nozzles 100 are arranged at intervals along the length direction of the air inlet pipe 6.

[0086] like Fig.10 and Fig.11 As shown, the oven 200 includes a plurality of air nozzles 100 and a box body 5. The plurality of air nozzles 100 are arranged inside the box body 5 and fixed to the inner wall of the box body 5 by means of bolts, snaps, bonding or welding. Preferably, bolt fixing is adopted so that the air nozzle 100 is detachably connected to the box body 5. When the air nozzle 100 is damaged, it can be disassembled, replaced or repaired.

[0087] A plurality of air nozzles 100 are arranged inside the box 5. In an optional embodiment, the plurality of air nozzles 100 are formed into an air nozzle group inside the box 5, and the air nozzle group is arranged along the length direction of the box 5, and each air nozzle 100 of the air nozzle group is fixed on the top wall of the box 5; a plurality of rollers 10 are also arranged inside the box 5, and the plurality of rollers 10 are arranged at intervals along the length direction of the box 5, and the rollers 10 are close to the bottom wall of the box 5, and a belt conveying channel 53 is formed between the plurality of rollers 10 and the air nozzle group; for the pole piece coated with a single layer of paint, after the pole piece enters the oven 200, the side of the pole piece coated with paint faces the air nozzle group, and the side of the pole piece not coated with paint faces the roller 10, and the roller 10 is used to support the pole piece. In another optional embodiment, the plurality of air nozzles 100 form a first row of air nozzle groups and a second row of air nozzle groups inside the box 5.

[0088] The oven 200 also includes an air inlet pipe 6, which is fixed on the box body 5. Each air nozzle 100 is connected to the air inlet pipe 6, and multiple air nozzles 100 are arranged at intervals along the length direction of the air inlet pipe 6. The hot flow gas flows into the air nozzle 100 through the air inlet pipe 6 and is blown out at the total air outlet 12 of the air nozzle 100.

[0089] In the prior art, the air volume is evenly distributed to each air nozzle through the wind-equalizing hull, and its structure size is large, the heat dissipation area is large, and the energy consumption is high. In the embodiment of the present application, the inner diameter of the air inlet pipe 6 along the gas flow direction gradually decreases, that is, the inner diameter at the air inlet near the air inlet pipe 6 is larger than the inner diameter at the air inlet away from the air inlet. Since the volume of the hot gas is inversely proportional to the pressure, the air pressure in the air inlet pipe 6 can be balanced so that the air pressure flowing into each air nozzle 100 is the same or similar. Therefore, eliminating the wind-equalizing hull structure in the existing oven can greatly reduce the volume and surface area of ​​the oven 200, improve space utilization, and reduce the heat dissipation energy consumption of the oven 200.

[0090] Preferably, the air inlet pipe 6 is a cylindrical ventilation duct or a rectangular column ventilation duct, and the inner diameter of the air inlet pipe 6 gradually decreases from the air inlet along the gas flow direction, so as to achieve the effect of balancing the air pressure in the air inlet pipe 6.

[0091] In an optional embodiment, the air inlet pipe 6 is arranged inside the box body 5 and fixed on the inner wall of the box body 5. An air inlet pipe opening is opened on the box body 5, and the air inlet pipe opening is connected to the air inlet pipe 6. The high-pressure air chamber is connected to the air inlet pipe 6 located inside the box body 5 through the air inlet pipe opening.

[0092] In another optional embodiment, the oven 200 further includes a plurality of air inlet branch pipes 7, the air inlet pipe 6 is disposed outside the box body 5 and fixed to the outer wall of the box body 5, one end of each of the air inlet branch pipes 7 is connected to the air inlet pipe 6, and the other end is connected to the main air inlet 11 of the corresponding air nozzle 100.

[0093] like Fig.10 As shown, the oven 200 further includes a box body 5 and an air inlet branch pipe 7. The air inlet pipe 6 is arranged outside the box body 5 and fixed on the outer wall of the box body 5. The air inlet pipe 6 is connected to the air nozzle 100 through the air inlet branch pipe 7. The air inlet pipe 6 is arranged outside the box body 5, which is convenient for connecting the air inlet pipe 6 with the high-pressure air chamber and can reduce the volume of the box body 5.

[0094] To further explain, one end of the air inlet branch pipe 7 is located outside the box body 5 , and the other end is located inside the box body 5 , so that the air inlet pipe 6 and the air nozzle 5 are connected through the air inlet branch pipe 7 .

[0095] In an optional embodiment, a plurality of the air nozzles 100 form a first exhaust nozzle group and a second exhaust nozzle group inside the box, the first exhaust nozzle group is close to the top wall of the box 5, the second exhaust nozzle group is close to the bottom wall of the box 5, and the first exhaust nozzle group and the second exhaust nozzle group are staggered. When both sides of the pole piece are coated with paint, the pole piece passes between the first exhaust nozzle group and the second exhaust nozzle group, the top of the pole piece faces the first exhaust nozzle group, and the bottom of the pole piece faces the second exhaust nozzle group. The first exhaust nozzle group and the second exhaust nozzle group both blow hot gas to the pole piece, thereby baking both sides of the pole piece, and the first exhaust nozzle group and the second exhaust nozzle group work together to make the pole piece suspended between the first exhaust nozzle group and the second exhaust nozzle group, the top of the pole piece will not touch the first exhaust nozzle group, and the bottom of the pole piece will not touch the second exhaust nozzle group, thereby preventing the air nozzle 100 from causing damage to the pole piece. When the pole piece is coated on one side, the first exhaust nozzle group and the second exhaust nozzle group can also work together to make the pole piece suspended between the first exhaust nozzle group and the second exhaust nozzle group. In a preferred embodiment, a roller 10 is provided between two adjacent nozzles 100 of the second exhaust nozzle group. When the pole piece is coated on one side, the roller 10 is used to support the pole piece. The first exhaust nozzle group and the second exhaust nozzle group are staggered, which can improve the uniformity of baking the pole piece.

[0096] In an optional embodiment, the box 5 is provided with a tape inlet 51 and a tape outlet 52, a tape path is formed between the first exhaust nozzle group and the second exhaust nozzle group, and the tape inlet 51 and the tape outlet 52 are both connected to the tape path 53. The electrode piece enters the box 5 from the tape inlet 51, passes through the tape path 53, and is baked by the first exhaust nozzle group and the second exhaust nozzle group, and leaves the box 5 from the tape outlet 52.

[0097] In an optional embodiment, the oven 200 further includes a throttle valve 8, which is arranged on the air inlet branch pipe 7. Each air inlet branch pipe 7 is provided with a throttle valve 8, and the air volume entering the air nozzle 100 from the air inlet pipe 6 can be individually adjusted by the throttle valve 8, so that the air volume entering each air nozzle 100 can be accurately controlled, and the drying state of the electrode piece can be more accurately adjusted, which can not only reduce the waste of heat due to overheating, but also reduce the occurrence of defects such as curling, wrinkling and cracking of the electrode ear, improve the production yield, and reduce the production cost.

[0098] In an optional embodiment, the oven 200 further includes an exhaust passage 9, the box body 5 is provided with an exhaust port, and the exhaust passage 9 is connected to the exhaust port. An exhaust fan is connected to the exhaust passage 9, and the hot gas inside the box body 5 can be discharged from the box body 5 through the exhaust passage 9 through the exhaust fan to balance the air pressure inside the box body 5.

[0099] In an optional embodiment, the oven 200 can be applied to a single-layer coating machine.

[0100] like Fig.14 As shown, a first coating mechanism 400 and a second coating mechanism 500 are provided at the belt inlet of the oven 200. The first coating mechanism 400 is used to coat one side of the electrode piece with paint, and the second coating mechanism 500 is used to coat the other side of the electrode piece with paint. After both sides of the electrode piece are coated with paint, the electrode piece enters the oven 200 through the belt inlet 51. After the first exhaust nozzle group and the second exhaust nozzle group complete the baking of both sides of the electrode piece, the electrode piece leaves the belt outlet 52 of the oven 200, and then is unloaded and output to enter the next station for operation.

[0101] According to the third aspect of the embodiment of the present application, a double-layer oven 300 is provided, comprising two of the above-mentioned ovens 200, wherein the two ovens 200 are respectively an upper oven 301 and a lower oven 302, the upper oven 301 and the lower oven 302 are stacked, the exhaust duct 9 of the upper oven 301 is located at the top of the box body 5 of the upper oven 301, and the exhaust duct 9 of the lower oven 302 is located at the bottom of the box body 5 of the lower oven 302.

[0102] like Fig.12 and Fig.13The double-layer oven 300 shown is a double-layer folding coater oven structure. The double-layer oven is two ovens 200 stacked and placed. The exhaust duct 9 of the lower oven 302 is arranged at the bottom of the box body 5 of the lower oven 302, and the exhaust duct 9 of the upper oven 301 is arranged at the top of the box body 5 of the upper oven 301, so that the overall height of the double-layer oven 300 can be reduced. The existing double-layer ovens are usually 6m-7m in height, and the double-layer oven 300 in the embodiment of the present application is 2.5m-3.5m in height, so there is no need to build an operation and maintenance platform, and only 30-50mm steps are required to operate or maintain the double-layer oven 300, saving the cost of building a steel platform and eliminating the safety hazards of high-altitude operations.

[0103] In an optional embodiment, the double-layer oven 300 further includes a return traction device 303, which is arranged outside the upper oven 301 and adjacent to the outlet of the upper oven 301. After the pole piece passes through the upper oven 301, it enters the lower oven 302 through the return traction device 303; or the return traction device 303 is arranged outside the lower oven 302 and adjacent to the outlet of the lower oven 302. After the pole piece passes through the lower oven 302, it enters the upper oven 301 through the return traction device 303.

[0104] To further explain, the double-layer oven 300 is used for a baking method in which one side of the electrode is first coated and then baked, and the other side is coated and then the cover side is baked.

[0105] The double-layer oven 300 further includes a return traction device 303, which can be disposed adjacent to the upper oven 301 or the lower oven 302. The return traction device 303 is used to pull the electrode sheet from the belt outlet 52 of one oven to the belt inlet of another oven to play a transition role.

[0106] like Fig.15 and Fig.16As shown, the description is made by taking the case where the return traction device 303 is arranged adjacent to the lower oven 302. The box body 5 of the lower oven 302 is provided with a belt inlet 51 and a belt outlet 52, which are located on two opposite sides of the box body 5; the belt inlet 51 of the lower oven 302 is provided with a first coating mechanism 400, which is used to apply coating to one side of the electrode sheet; the belt outlet 52 of the lower oven 302 is provided with a return traction device 303; the box body 5 of the upper oven 301 ... upper oven 301 is provided with a first coating mechanism 400, which is used to apply coating to one side of the electrode sheet; the belt outlet 52 of the lower oven 302 is provided with a return traction device 303; the box body 5 of the upper oven 301 is provided with a belt inlet 51 and a belt The belt outlet 52 of the lower oven 301 and the belt inlet 51 of the lower oven 302 are located on the same side, and the belt inlet 51 of the upper oven 301 and the belt outlet 52 of the lower oven 302 are located on the same side, so that the electrode can enter the upper oven 301 through the belt inlet 51 of the upper oven 301 after leaving the lower oven 302; a second coating mechanism 500 is provided at the belt inlet 51 of the upper oven 301, and the second coating mechanism 500 is used to coat the other side of the electrode with paint. After the electrode is coated with paint by the first coating mechanism 400, it enters the lower oven 302 through the belt inlet 51 of the lower oven 302 to bake the side of the electrode coated with paint, and then leaves at the belt outlet 52 of the lower oven 302. The electrode is pulled to the second coating mechanism 500 by the return traction device 303 to coat the other side of the electrode, and then enters the upper oven 301 through the belt inlet 51 of the upper oven 301 to bake the electrode. The electrode that has been baked in the upper oven 301 leaves through the belt outlet 52 of the upper oven 301, and then is unloaded and output to enter the next workstation for operation.

[0107] To further illustrate, the folding and traction device 303 may be a roller for folding and transitioning the upper and lower layers of the pole piece.

[0108] like Fig.16 As shown, in the upper oven 301 and the lower oven 302, a roller 10 is provided between two adjacent nozzles 100 of the second exhaust nozzle group, and the roller 10 is used to support the non-baking surface of the electrode.

[0109] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are only for illustration, not for limiting the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A tuyere, characterized in that: include: A shell body, wherein a main air outlet and a main air inlet are provided on the shell body; a first air balancing plate, which is disposed inside the housing and divides the interior of the housing into a pressure regulating chamber and a first chamber; the total air inlet is communicated with the pressure regulating chamber, and the total air outlet is communicated with the first chamber; The cross-sectional area of ​​the pressure regulating cavity close to the total air inlet is larger than the cross-sectional area away from the total air inlet, and the first air balancing plate is provided with a plurality of first ventilation holes; The density of the first ventilation holes close to the main air inlet is less than the density of the first ventilation holes far from the main air inlet; and / or The aperture of the first ventilation hole close to the main air inlet is smaller than the aperture of the first ventilation hole far from the main air inlet.

2. The air nozzle according to claim 1, characterized in that: A second air balancing plate is disposed in the first chamber, and a second ventilation hole is formed on the second air balancing plate.

3. The air nozzle according to claim 2, characterized in that: The aperture of the second ventilation hole is smaller than the aperture of the first ventilation hole.

4. The air nozzle according to claim 2, characterized in that: The second air equalizing plate divides the first chamber into a second chamber and a third chamber, the third chamber is connected to the main air outlet, and the second chamber is connected to the third chamber through the second ventilation hole.

5. The air nozzle according to claim 4, characterized in that: The third chamber is provided with a return air passage, the outer wall of the return air passage and the inner wall of the shell form a guide passage, and the guide passage is communicated with the main air outlet.

6. The air nozzle according to claim 5, characterized in that: The shell is provided with a return air outlet hole and a return air inlet hole, and the return air inlet hole and the return air outlet hole are both connected to the return air channel.

7. The air nozzle according to claim 6, characterized in that: The guide channel includes a first sub-guide channel and a second sub-guide channel, and the main air outlet includes a first air outlet and a second air outlet; The housing comprises a first inclined plate and a second inclined plate, the first inclined plate and the second inclined plate are inclined in a direction close to each other, the first inclined plate and the outer wall of the return air channel form the first sub-guiding channel, and the second inclined plate and the outer wall of the return air channel form the second sub-guiding channel; The first air outlet is communicated with the first sub-guiding channel, and the second air outlet is communicated with the second sub-guiding channel.

8. The air nozzle according to claim 7, characterized in that: The extension line of the outlet of the first sub-guiding channel intersects with the extension line of the outlet of the second sub-guiding channel; the axis of the return air inlet hole intersects with the extension line of the outlet of the first sub-guiding channel and / or the extension line of the outlet of the second sub-guiding channel.

9. An oven, characterized in that: It comprises a box body and a plurality of air nozzles according to any one of claims 1 to 8, wherein the air nozzles are arranged inside the box body and fixed on the inner wall of the box body.

10. The oven according to claim 9, characterized in that The oven also includes an air inlet pipe, the inner diameter of which gradually decreases along the gas flow direction, the air inlet pipe is fixed on the box body, each of the air nozzles is connected to the air inlet pipe, and a plurality of the air nozzles are arranged at intervals along the length direction of the air inlet pipe.

11. The oven according to claim 10, characterized in that The oven also includes a plurality of air inlet branch pipes, which are arranged outside the box body and fixed on the outer wall of the box body, one end of each of the air inlet branch pipes is connected to the air inlet pipe, and the other end is connected to the main air inlet of the corresponding air nozzle.

12. The oven according to claim 9, characterized in that The plurality of air nozzles form a first exhaust nozzle group and a second exhaust nozzle group inside the box, wherein the first exhaust nozzle group is close to the top wall of the box, and the second exhaust nozzle group is close to the bottom wall of the box, and the first exhaust nozzle group and the second exhaust nozzle group are staggered.

13. The oven according to claim 12, characterized in that The box body is provided with a tape inlet and a tape outlet, a tape walking channel is formed between the first exhaust nozzle group and the second exhaust nozzle group, and the tape inlet and the tape outlet are both connected to the tape walking channel.

14. The oven according to claim 11, characterized in that The oven further comprises a throttle valve, and the throttle valve is arranged on the air inlet branch pipe.

15. The oven according to claim 9, characterized in that The oven further comprises an exhaust passage, the box body is provided with an exhaust port, and the exhaust passage is communicated with the exhaust port.

16. A double-layer oven, characterized in that: The invention comprises two ovens as described in any one of claims 9 to 15, wherein the two ovens are an upper oven and a lower oven respectively, the upper oven and the lower oven are stacked, the exhaust duct of the upper oven is located at the top of the box body of the upper oven, and the exhaust duct of the lower oven is located at the bottom of the box body of the lower oven.

17. The double-layer oven according to claim 16, characterized in that: The double-layer oven also includes a return traction device; The return traction device is arranged outside the upper oven and adjacent to the outlet of the upper oven. After the pole piece passes through the upper oven, it enters the lower oven through the return traction device; or The return traction device is arranged outside the lower oven and adjacent to the outlet of the lower oven. After passing through the lower oven, the pole piece enters the upper oven through the return traction device.

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