Coating device for processing scratch-resistant low-emissivity glass and production process thereof

Abstract

The invention discloses a coating device for processing scratch-resistant low-emissivity glass and a production process of the coating device, and relates to the technical field of glass float preparation. The coating device for scratch-resistant low-radiation glass processing comprises a shell and conveying rollers arranged in the shell, the conveying rollers are arranged in the shell side by side to form a conveying module of a glass tape, each conveying roller is composed of a supporting section and an empty section, and the empty sections and the supporting sections are arranged in a staggered mode; the supporting section is used for supporting and conveying a glass tape, and protective gas is sprayed out of the empty section. By arranging the empty sections on the conveying rollers and spraying the protective gas at the empty sections, when the conveying rollers make contact with the glass tape, the contact portion of the glass tape cannot be affected, the two adjacent conveying rollers and the adjacent empty sections are arranged in a staggered mode, and therefore the protective gas is evenly distributed on the lower surface of the glass tape; and thus, the uniformity of the thickness of the formed Na2SO4 film is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of glass float production, and specifically to a coating device and its production process for scratch-resistant low-emissivity glass processing. Background Art

[0002] In traditional float glass production, when the glass ribbon is conveyed by rollers, direct contact with the rollers easily causes micro-scratches on the lower surface. In products with high requirements for the surface quality of glass, such as electronic glass, scratches will result in unqualified surface quality of the glass. To avoid this problem, SO2 is used to treat the lower surface of the glass to form a Na2SO4 protective film, thereby protecting the lower surface of the glass.

[0003] In the prior art, SO2 gas is usually sprayed below the roller path, and the sprayed gas rises to contact the lower surface of the glass ribbon and reacts to form a protective film. Among them, the upward movement of the protective gas requires a certain amount of time. This method is limited by the range of the nozzle, and the uniformity of the formed protective film is poor. Moreover, after the protective gas reacts, the concentration of SO2 gas in a local area will decrease, further reducing the uniformity of the thickness of the protective film. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a coating device and its production process for scratch-resistant low-emissivity glass processing, which solves the problems raised in the background art.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: A coating device and its production process for scratch-resistant low-emissivity glass processing, including a housing and conveyor rollers arranged in the housing. The conveyor rollers are arranged side by side in the housing to form a conveying module for the glass ribbon. The conveyor rollers are composed of a support section and a void section, and the void section and the support section are arranged alternately; the support section is used to support and convey the glass ribbon, and protective gas is sprayed at the void section to form a protective film on the lower surface of the glass ribbon, and the support sections on adjacent two conveyor rollers are arranged staggeredly.

[0006] Further, an impeller is provided in the void section. The diameter of the impeller is smaller than that of the support section. The impeller includes: a hollow tube, the interior of which is used to accommodate the protective gas; blades, there are multiple blades, and the multiple blades are fixedly arranged on the surface of the hollow tube in a circumferential array, and there is a gap between adjacent blades; a first air supply hole, which is opened on the surface of the hollow tube and is located at the gap between adjacent blades; covers, which are fixedly arranged at both ends of the hollow tube to seal both ends of the hollow tube.

[0007] Further, a single blade has a concave side and a convex side, and the impeller rotates towards the concave side; the first air supply hole is inclined towards the concave side of the blade.

[0008] Further, a second hollow shaft is axially provided at the axis of the impeller, and the second hollow shaft penetrates through the cover; a partition plate is provided in the second hollow shaft, and the partition plate divides the space in the second hollow shaft into a first air inlet chamber and a second air inlet chamber. The protective gas introduced into one end of the second hollow shaft enters the first air inlet chamber, and the protective gas introduced into the other end of the second hollow shaft enters the second air inlet chamber; second air permeation holes are formed on the outer surface of the second hollow shaft, and the second air permeation holes are symmetrically arranged with respect to the partition plate so that both the first air inlet chamber and the second air inlet chamber communicate with the inside of the hollow tube.

[0009] Further, baffles are fixedly provided on both sides inside the housing. The baffles are parallel to the glass belt, and there is a certain distance between the baffles and the glass belt; a gas blocking plate is provided at one end of the housing. There is a certain distance between the upper end of the gas blocking plate and the lower surface of the glass belt. An exhaust port is formed on the side of the gas blocking plate close to the conveying roller; a exhaust pipe is provided on the side of the gas blocking plate away from the conveying roller. A channel is provided between the exhaust pipe and the exhaust port, and the channel is used to communicate the exhaust port with the inside of the exhaust pipe; the cross-section of the channel at the end close to the exhaust port is larger than that at the end close to the exhaust pipe.

[0010] Further, a first gear is fixedly provided on one side of the second hollow shaft, and the first gear is used to drive the second hollow shaft to rotate; first hollow shafts are fixedly provided at both ends of the conveying roller. The conveying roller and the first hollow shafts are both sleeved on the outer peripheral surface of the second hollow shaft. A second gear is fixedly provided on one side of the first hollow shaft, and the second gear is used to drive the conveying roller to rotate; connecting rods are provided between adjacent support sections. There are multiple connecting rods, and the multiple connecting rods are arranged around the impeller so that when a single support section rotates, it drives all the support sections on the conveying roller to rotate.

[0011] Further, a sliding cylinder is provided in the hollow tube, and the sliding cylinder can move axially along the hollow tube; one end of the sliding cylinder is open, and the other end of the sliding cylinder is penetrated by the second hollow shaft, and the sliding cylinder is slidably and sealingly connected to the second hollow shaft; a first spring is provided between the penetrated end of the sliding cylinder and the cover, and the first spring plays a role in resetting the sliding cylinder; first air permeation holes are formed on the surface of the sliding cylinder, and the first air permeation holes correspond to the first air supply holes one by one.

[0012] Further, air slide rings are installed at both ends of the second hollow shaft. The fixed end of the air slide ring has an air inlet to input protective gas into the air slide ring, and the rotating end of the air slide ring is communicated with the second hollow shaft through a connecting pipe.

[0013] Furthermore, a cover body is provided inside the housing. The cover bodies correspond to the conveying rollers one by one. The lower side of the cover body is arc-shaped and surrounds the lower side of the conveying roller. The side of the cover body close to the side where the glass ribbon enters the housing is the high end, and the end of the cover body close to the side where the glass ribbon leaves the housing is the low end.

[0014] The present invention also provides an anti-scratch low-emissivity glass production process, which is applicable to the coating device for processing the anti-scratch low-emissivity glass described in any one of the above, and includes the following steps: Step 1: Pull out the glass ribbon from the tin bath and convey it into the housing. When the glass ribbon is fed into the housing, the temperature is 400°-700°. Step 2: The glass ribbon is continuously conveyed in the housing through the conveying rollers. During the conveying process, the support section on the conveying roller supports the glass ribbon, and the empty section provides a mixed gas of sulfur dioxide and nitrogen to the glass ribbon, so that the sulfur dioxide gas reacts with the surface of the glass ribbon at a high temperature to form a sodium sulfate protective film. Step 3: Feed the glass ribbon with the formed protective film into the annealing furnace for cooling.

[0015] The present invention has the following beneficial effects: (1) For the coating device for processing the anti-scratch low-emissivity glass, by providing an empty section on the conveying roller and spraying a protective gas at the empty section, when the conveying roller contacts the glass ribbon, it will not affect the contact part of the glass ribbon. The adjacent empty sections are arranged staggeredly between two adjacent conveying rollers, so that the protective gas is evenly distributed on the lower surface of the glass ribbon, thereby improving the uniformity of the thickness of the formed Na2SO4 film.

[0016] (2) For the coating device for processing the anti-scratch low-emissivity glass, by providing an impeller at the empty section and respectively driving the impeller and the conveying roller to rotate, the impeller can push the gas in the housing to flow to one side, continuously removing the reacted protective gas, thereby increasing the concentration of the protective gas on the lower side of the glass ribbon and accelerating the reaction rate.

[0017] Of course, it is not necessary for any product implementing the present invention to achieve all the above advantages simultaneously. Description of the Drawings

[0018] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a front view of the overall structure of the present invention; Figure 3 is a schematic diagram of the structure of the cover body and a single conveying roller of the present invention; Figure 4 is a schematic diagram of the distribution of multiple conveying rollers inside the housing of the present invention; Figure 5 is a schematic diagram of the cooperation structure of the conveying roller and the impeller of the present invention; Figure 6 This is an exploded view of the conveyor roller and impeller structures of the present invention; Figure 7 This is another schematic diagram of the structure of the conveyor roller of the present invention; Figure 8 This is an exploded view of the impeller structure of the present invention; Figure 9 This is a front elevation sectional view of the internal structure of the impeller of the present invention; Figure 10 This is a side elevation sectional view of the internal structure of the impeller of the present invention; Figure 11 This is a schematic diagram of the internal structure of the second hollow shaft of the present invention; Figure 12 This is the present invention Figure 2 Enlarged schematic diagram of area A; Figure 13 This is the present invention Figure 2 Enlarged schematic diagram of area B; Figure 14 This is a side elevation sectional view of the air baffle of the present invention; Figure 15 This is the present invention Figure 14 Enlarged schematic diagram of area C; Figure 16 This is a mating diagram of the housing and the conveyor roller of the present invention.

[0019] In the figure, 1. housing; 2. glass belt; 3. baffle; 4. support platform; 5. first fixing plate; 6. second fixing plate; 7. first gear; 8. second gear; 9. third gear; 10. air slide ring; 11. connecting pipe; 12. housing; 13. conveyor roller; 131. support section; 132. impeller; 1321. hollow pipe; 1322. blade; 1323. first air delivery hole; 1324. cover; 1325. screw; 1326. sliding cylinder; 1327. first air permeation hole; 1328. retaining ring; 1329. first spring; 133. connecting rod; 134. side roller; 135. empty section; 14. first hollow shaft; 15. second hollow shaft; 151. partition plate; 152. first air inlet chamber; 153. second air inlet chamber; 154. second air permeation hole; 16. air baffle; 17. exhaust port; 18. exhaust pipe; 19. channel; 191. straight plate; 192. folded plate. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] In the description of the present invention, it should be understood that the terms "open hole", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery", etc. indicating the orientation or position relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0022] The following refers to Figure 1 - Figure 16 , and describes the coating device and its production process for anti-scratch low-emissivity glass processing provided by the embodiments of the present invention.

[0023] On the one hand, the present invention provides a first coating device for anti-scratch low-emissivity glass processing.

[0024] Please refer to Figure 1 - Figure 7 , the coating device for anti-scratch low-emissivity glass processing includes a housing 1. One side of the housing 1 is a tin bath, and the other side is an annealing kiln (the tin bath and the annealing kiln are not shown in the figure). A plurality of conveying rollers 13 are arranged in the housing 1. The plurality of conveying rollers 13 are arranged side by side in the housing 1 to form a conveying module for the glass ribbon 2. The glass ribbon 2 pulled out from the tin bath enters the annealing kiln through the conveying of the plurality of conveying rollers 13. The temperature of the glass ribbon 2 in the housing 1 is about 600°. The conveying roller 13 includes a support section 131 and an empty section 135. The empty section 135 is distributed along the axial direction of the support section 131. The support section 131 is used to support and convey the glass ribbon 2, and the protective gas can be ejected from the empty section 135. The support sections 131 on two adjacent conveying rollers 13 are arranged staggeredly. At this time, the empty sections 135 are also in a staggered arrangement state. For example, the middle of one conveying roller 13 is the empty section 135, and the two sides are the support sections 131. Then, the middle of the other adjacent conveying roller 13 is the support section 131, and the two sides are the empty sections 135, so that the ejected protective gas can be evenly distributed on the lower surface of the glass ribbon 2. In fact, a plurality of empty sections 135 and support sections 131 can be arranged on one conveying roller 13, and the empty sections 135 and the support sections 131 are arranged in a crossed manner (as Figure 7 shown).

[0025] And, in combination with Figure 6, a connecting rod 133 is provided between adjacent support segments 131. There are multiple connecting rods 133, and the multiple connecting rods 133 are arranged in a circumferential array around the axis of the support segment 131. The connecting rod 133 is used to fix the coaxially spaced support segments 131 into a whole and avoid obstructing the empty segment 135. When a single support segment 131 rotates, it can drive all the support segments 131 thereon to rotate, so as to facilitate the conveying of the glass belt 2. When the connecting rod 133 is located at the edge of the conveying roller 13, one end of the connecting rod 133 lacks fixation. At this time, a side roller 134 can be fixedly arranged at the edge of the conveying roller 13, and one end of the connecting rod 133 is fixedly connected to the side roller 134. The diameter of the side roller 134 is the same as that of the support segment 131, and the length is less than that of the support segment 131, thereby reducing the occupation of the empty segment 135.

[0026] In the prior art, a long roller is usually provided. The long roller is used to convey the glass belt 2, and holes are provided in the long roller. The protective gas is ejected from the holes. Since the long roller is in a continuous rotating state, when the outlet of the hole contacts the lower surface of the glass belt 2, the glass belt 2 will block the gas outlet of the hole. In the light case, the air flow near the hole will be disordered, and then the thickness of the Na2SO4 film will be uneven. When the air flow pressure is large, it is also possible that the part of the glass belt 2 located at the hole will bear a large local pressure, causing local deformation of the glass belt 2 (the glass belt 2 has softness when not cooled). Compared with the prior art, ejecting the protective gas at the empty segment 135 makes it possible that when the conveying roller 13 contacts the glass belt 2, it will not affect the contact part of the glass belt 2. The adjacent empty segments 135 are arranged staggeredly between two adjacent conveying rollers 13, so that the protective gas is evenly distributed on the lower surface of the glass belt 2, and then the uniformity of the thickness of the formed Na2SO4 film is improved.

[0027] Combined with Figure 5 - Figure 10 , in order to facilitate the ejection of the protective gas at the empty segment 135, an impeller 132 is provided in the empty segment 135. The impeller 132 is coaxial with the empty segment 135, and the diameter of the impeller 132 is smaller than that of the support segment 131, so that the connecting rod 133 can be arranged around the impeller 132. The impeller 132 includes a hollow tube 1321, and the hollow tube 1321 is the main body of the impeller 132. The inside of the hollow tube 1321 is used to accommodate the protective gas. In addition, a plurality of blades 1322 are provided on the surface of the hollow tube 1321. The plurality of blades 1322 are arranged in a circumferential array, and there are gaps between adjacent blades 1322. When the blades 1322 rotate with the hollow tube 1321, they can push the gas flow near themselves. The hollow tubes 1321 on each conveying roller 13 rotate in the same direction, thereby promoting the gas in the housing 1 to flow in one direction.

[0028] Moreover, a first air supply hole 1323 is formed on the surface of the hollow tube 1321. The first air supply hole 1323 is located at the gap between adjacent blades 1322, and the first air supply hole 1323 can send the protective gas inside the hollow tube 1321 to the outside thereof.

[0029] Furthermore, caps 1324 are fixedly provided at both ends of the hollow tube 1321. The caps 1324 are fixed to both ends of the hollow tube 1321 by screws 1325, so as to seal both ends of the hollow tube 1321 and prevent the protective gas from leaking out of both ends of the hollow tube 1321.

[0030] In this embodiment, combined with Figure 10 , a single blade 1322 has a concave side and a convex side. Preferably, the concave side of the blade 1322 faces the conveying direction of the glass ribbon 2, and the hollow tube 1321 drives the impeller 132 to rotate towards the concave side, so as to promote the reverse flow of the protective gas inside the housing 1 towards the moving direction of the glass ribbon 2.

[0031] Moreover, the first air supply hole 1323 is inclined towards the concave side of the blade 1322, so that the gas ejected from the first air supply hole 1323 directly contacts the concave side of the blade 1322, improving the pushing effect of the blade 1322 on the protective gas.

[0032] Combined with Figure 9 - Figure 11 , in order to facilitate the delivery of the protective gas into the hollow tube 1321, a second hollow shaft 15 is axially provided at the axis of the impeller 132. The second hollow shaft 15 penetrates through the cap 1324 and is fixedly connected to the cap 1324. When the second hollow shaft 15 rotates, it can drive the hollow tube 1321 to rotate together.

[0033] Moreover, in order to make the protective gas delivered from the second hollow shaft 15 be uniformly delivered axially, a partition plate 151 is provided inside the second hollow shaft 15. The partition plate 151 divides the space inside the second hollow shaft 15 into a first air inlet chamber 152 and a second air inlet chamber 153. Protective gas can be introduced into both ends of the second hollow shaft 15, and the pressure and flow rate of the gas introduced into both ends should be the same. The protective gas introduced into one end of the second hollow shaft 15 enters the first air inlet chamber 152, and the protective gas introduced into the other end of the second hollow shaft 15 enters the second air inlet chamber 153. Second air permeation holes 154 are formed on the outer surface of the second hollow shaft 15, and the second air permeation holes 154 are symmetrically arranged with respect to the partition plate 151, so that both the first air inlet chamber 152 and the second air inlet chamber 153 are communicated with the inside of the hollow tube 1321. By making the gas at both ends flow in opposite directions inside the second hollow shaft 15 and then flow into the hollow tube 1321, the attenuation of the flow rate and pressure of the single-end gas flowing outwards along the second hollow shaft 15 can be compensated, and further, the gas flowing from the hollow tube 1321 into the housing 1 is in a relatively uniform and stable state.

[0034] Combined Figure 8 - Figure 10 , in order to further improve the uniformity and stability of the protective gas flowing from the inside of the hollow tube 1321 into the housing 1, a sliding cylinder 1326 is provided inside the hollow tube 1321. The sliding cylinder 1326 can move along the axial direction of the hollow tube 1321. One end of the sliding cylinder 1326 is open, and the other end is penetrated by the second hollow shaft 15 and slides along the surface of the second hollow shaft 15. A first spring 1329 is provided between the penetrated end of the sliding cylinder 1326 and the cover 1324. The first spring 1329 plays a reset role for the sliding cylinder 1326. First air holes 1327 are provided on the surface of the sliding cylinder 1326, and the first air holes 1327 correspond to the first air supply holes 1323 one by one. When the air pressure in the sliding cylinder 1326 is insufficient, the first air holes 1327 are misaligned with the first air supply holes 1323, and the protective gas in the sliding cylinder 1326 cannot pass through the first air supply holes 1323. When the air pressure in the sliding cylinder 1326 is sufficient, the first air holes 1327 are communicated with the first air supply holes 1323, so that the protective gas passes through the first air supply holes 1323. Retaining rings 1328 are fixedly provided at both ends of the inner wall of the hollow tube 1321. The retaining rings 1328 are used to limit the position of the sliding cylinder 1326, so as to make the sliding cylinder 1326 located at a specified position.

[0035] Combined Figure 4 、 Figure 12 and Figure 13 , since the second hollow shaft 15 is in a rotating state, in order to facilitate the introduction of the protective gas into the second hollow shaft 15, air slip rings 10 are installed at both ends of the second hollow shaft 15. One end of the air slip ring 10 is a fixed end, and the other end is a rotating end. The gas introduced from the fixed end can be discharged from the rotating end. Specifically, support platforms 4 are provided on both sides of the housing 1, and a first fixing plate 5 is fixedly provided on the support platforms 4. The fixed end of the air slip ring 10 is installed on the first fixing plate 5, and the rotating end of the air slip ring 10 is fixedly connected to the second hollow shaft 15. Among them, the protective gas is introduced from the fixed end of the air slip ring 10. For example, an intake pipe can be provided, and the intake pipe is communicated with the fixed ends of all the air slip rings 10, so as to input the protective gas to all the air slip rings 10 at the same time. The interfaces at the rotating ends of the air slip rings 10 are communicated with the second hollow shaft 15 through connecting pipes 11 to introduce the protective gas into the rotating second hollow shaft 15. The second hollow shaft 15 has two intake ports, so two intake pipes need to be provided here.

[0036] Combined Figure 3 、 Figure 4 、 Figure 14 and Figure 15, in order to facilitate the discharge of the protective gas inside the housing 1, baffles 3 are fixedly provided on both sides inside the housing 1. The baffles 3 are parallel to the glass ribbon 2, and there is a certain distance between the baffles 3 and the glass ribbon 2, about 1 cm. The baffles 3 can prevent the protective gas from overflowing from both ends of the glass ribbon 2, thereby reducing the waste of the protective gas.

[0037] Moreover, an air baffle 16 is provided at one end of the housing 1. Preferably, the air baffle 16 is arranged on the side where the glass ribbon 2 leaves the housing 1. There is a certain distance between the upper end of the air baffle 16 and the lower surface of the glass ribbon 2, about 1 cm, so as to form a slit between the upper end of the air baffle 16 and the lower surface of the glass ribbon 2. An exhaust port 17 is provided on the side of the air baffle 16 close to the conveying roller 13, and an exhaust pipe 18 is provided on the side of the air baffle 16 far from the conveying roller 13. A channel 19 is provided between the exhaust pipe 18 and the exhaust port 17. Preferably, the channel 19 is formed by combining a straight plate 191 and a folding plate 192, and the cross-section of the channel 19 at the end close to the exhaust port 17 is larger than that at the end close to the exhaust pipe 18. The channel 19 is used to connect the exhaust port 17 and the inside of the exhaust pipe 18. The exhaust pipe 18 is connected to a suction fan (not shown in the figure) for sucking the gas inside the exhaust pipe 18. When the protective gas passes through the channel 19, the cross-section of the channel 19 becomes smaller from large, and the flow rate of the gas increases, thereby increasing the suction speed of the gas.

[0038] Combined with Figure 3 , Figure 4 and Figure 16 , optionally, in order to make the protective gas concentrate on the lower side of the glass ribbon 2, a cover 12 is provided inside the housing 1. The covers 12 correspond to the conveying rollers 13 one by one. The lower side of the cover 12 is arc-shaped and surrounds the lower side of the conveying roller 13, thereby preventing the gas from escaping under the conveying roller 13. The cover 12 has a high side and a low side. The high side of the cover 12 is close to the side where the glass ribbon 2 enters the housing 1. Preferably, the high side of the cover 12 is arc-shaped so that the protective gas deflects towards the lower surface of the glass ribbon 2. The low side of the cover 12 is close to the side where the glass ribbon 2 leaves the housing 1, so as to facilitate the gas ejected from the empty section 135 to flow towards the low side of the cover 12. The adjacent covers 12 are in close contact with each other and arranged without gaps.

[0039] Combined with Figure 1 , Figure 3 , Figure 12 and Figure 13, To facilitate driving the rotation of the second hollow shaft 15, a first gear 7 is fixedly provided at one end of each second hollow shaft 15. The first gear 7 can drive the second hollow shaft 15 to rotate. A third gear 9 is provided between adjacent first gears 7. The third gear 9 can be installed on the housing 1. A second fixed plate 6 can be provided on the support table 4, and the other end of the rotating shaft of the third gear 9 is rotatably installed on the second fixed plate 6 to improve the stability of the movement of the third gear 9. The third gear 9 meshes with the first gears 7 on both sides. When driving is required, one of the first gears 7 can be selected as the driving gear and driven by a motor (the motor is not shown in the figure), so that all the first gears 7 rotate in the same direction. When there are more first gears 7 to be driven, to reduce the load of the motor, multiple first gears 7 can be selected as the driving gears.

[0040] In addition, first hollow shafts 14 are fixedly provided at both ends of the conveyor roller 13. The conveyor roller 13 and the first hollow shafts 14 are both sleeved on the outer peripheral surface of the second hollow shaft 15. A second gear 8 is fixedly provided at one end of each first hollow shaft 14. The second gear 8 can drive the first hollow shaft 14 to rotate. The driving method of the second gear 8 can refer to that of the first gear 7, and the two can use the same structure.

[0041] The reason for separately rotating the first hollow shaft 14 and the second hollow shaft 15 is to ensure that when increasing the rotation speed of the second hollow shaft 15, it will not affect the first hollow shaft 14, that is, it will not affect the conveying speed of the glass belt 2, thereby adjusting the flow rate of the gas in the housing 1.

[0042] During use (operation), the support sections 131 on adjacent conveyor rollers 13 are arranged staggeredly. The second gear 8 drives the conveyor roller 13 to rotate, thereby driving the glass belt 2 to move in the housing 1. A protective gas is introduced into the second hollow shaft 15, and the protective gas is discharged into the housing 1 through the impeller 132 at the empty section 135. At the same time, the first gear 7 drives the second hollow shaft 15 to rotate, causing the impeller 132 to rotate synchronously, promoting the flow of the gas in the housing 1 towards the side where the glass belt 2 leaves the housing 1.

[0043] The present invention also provides an anti-scratch low-emissivity glass production process, which is applicable to the coating device for processing the anti-scratch low-emissivity glass described above, and includes the following steps: Step 1: Pull the glass belt 2 out of the tin bath and convey it into the housing 1. The temperature of the glass belt 2 when it is fed into the housing 1 is 400° - 700°; Step 2: The glass belt 2 is continuously conveyed in the housing 1 by the conveyor roller 13. During the conveying process, the support section 131 on the conveyor roller 13 supports the glass belt 2, and the empty section 135 provides a mixed gas of sulfur dioxide and nitrogen to the glass belt 2, so that the sulfur dioxide gas reacts with the surface of the glass belt 2 at a high temperature to form a sodium sulfate protective film; Step 3: Feed the glass ribbon 2 forming the protective film into an annealing furnace for cooling.

Claims

1. A coating device for processing scratch-resistant low-emissivity glass, comprising a housing (1) and a conveying roller (13) arranged inside the housing (1), characterized in that, The conveying rollers (13) are arranged side by side in the housing (1) to form a conveying module for the glass belt (2). The conveying rollers (13) are composed of a supporting section (131) and a hollow section (135), and the hollow section (135) and the supporting section (131) are arranged alternately; The supporting section (131) is used to support and convey the glass belt (2), and protective gas is ejected at the hollow section (135). The supporting sections (131) on two adjacent conveying rollers (13) are arranged staggeredly.

2. The coating device for processing scratch-resistant low-emissivity glass according to claim 1, characterized in that: An impeller (132) is arranged in the hollow section (135). The diameter of the impeller (132) is smaller than that of the supporting section (131). The impeller (132) includes: A hollow tube (1321) whose interior is used to accommodate the protective gas; Blades (1322). A plurality of the blades (1322) are fixedly arranged on the surface of the hollow tube (1321) in a circumferential array, and there is a gap between adjacent blades (1322); A first air outlet hole (1323) is opened on the surface of the hollow tube (1321) and is located at the gap between adjacent blades (1322); End caps (1324) are fixedly arranged at both ends of the hollow tube (1321) to seal both ends of the hollow tube (1321).

3. The coating device for processing scratch-resistant low-emissivity glass according to claim 2, characterized in that: Each single blade (1322) has a concave side and a protruding side, and the impeller (132) rotates towards the concave side; The first air outlet hole (1323) is inclined towards the concave side of the blade (1322).

4. A coating device for processing scratch-resistant low-emissivity glass according to claim 3, characterized in that: A second hollow shaft (15) is arranged axially at the axis of the impeller (132), and the second hollow shaft (15) penetrates through the end cap (1324); A partition plate (151) is arranged in the second hollow shaft (15). The partition plate (151) divides the space in the second hollow shaft (15) into a first air inlet cavity (152) and a second air inlet cavity (153). The protective gas introduced into one end of the second hollow shaft (15) enters the first air inlet cavity (152), and the protective gas introduced into the other end of the second hollow shaft (15) enters the second air inlet cavity (153); Second air permeable holes (154) are opened on the outer surface of the second hollow shaft (15). The second air permeable holes (154) are symmetrically arranged with respect to the partition plate (151), so that both the first air inlet cavity (152) and the second air inlet cavity (153) are communicated with the interior of the hollow tube (1321).

5. A coating device for processing scratch-resistant low-emissivity glass according to claim 4, characterized in that: Shield plates (3) are fixedly arranged on both sides inside the housing (1). The shield plates (3) are parallel to the glass belt (2), and there is a certain distance between the shield plates (3) and the glass belt (2); A gas blocking plate (16) is arranged at one end of the housing (1). There is a certain distance between the upper end of the gas blocking plate (16) and the lower surface of the glass belt (2). An exhaust port (17) is opened on the side of the gas blocking plate (16) close to the conveying roller (13); On one side of the air baffle (16) away from the conveying roller (13), there is an exhaust pipe (18). Between the exhaust pipe (18) and the exhaust port (17), there is a channel (19) which is used to connect the exhaust port (17) with the inside of the exhaust pipe (18). The cross-section of one end of the channel (19) close to the exhaust port (17) is larger than that of the end close to the exhaust pipe (18).

6. The coating device for processing scratch-resistant low-emissivity glass according to claim 5, characterized in that: On one side of the second hollow shaft (15), a first gear (7) is fixedly installed, and the first gear (7) is used to drive the second hollow shaft (15) to rotate. At both ends of the conveying roller (13), first hollow shafts (14) are fixedly installed. The conveying roller (13) and the first hollow shafts (14) are both sleeved on the outer peripheral surface of the second hollow shaft (15). On one side of the first hollow shaft (14), a second gear (8) is fixedly installed, and the second gear (8) is used to drive the conveying roller (13) to rotate. Between adjacent support sections (131), there are connecting rods (133). There are multiple connecting rods (133), and the multiple connecting rods (133) are arranged around the impeller (132).

7. A coating device for processing scratch-resistant low-emissivity glass according to claim 6, characterized in that: Inside the hollow tube (1321), there is a sliding cylinder (1326), and the sliding cylinder (1326) can move axially along the hollow tube (1321). One end of the sliding cylinder (1326) is open, and the other end of the sliding cylinder (1326) is penetrated by the second hollow shaft (15), and the sliding cylinder (1326) is slidably and sealingly connected to the second hollow shaft (15). Between the penetrated end of the sliding cylinder (1326) and the cover (1324), there is a first spring (1329), and the first spring (1329) plays a role in resetting the sliding cylinder (1326). On the surface of the sliding cylinder (1326), first air-permeable holes (1327) are opened, and the first air-permeable holes (1327) correspond to the first air supply holes (1323) one by one.

8. A coating device for processing scratch-resistant low-emissivity glass according to claim 7, characterized in that: At both ends of the second hollow shaft (15), air slip rings (10) are installed. The fixed end of the air slip ring (10) has an air inlet, and the rotating end of the air slip ring (10) is communicated with the second hollow shaft (15) through a connecting pipe (11).

9. The coating device for processing scratch-resistant low-emissivity glass according to claim 8, wherein: Inside the housing (1), there is a cover body (12). The cover body (12) corresponds to the conveying roller (13) one by one. The lower side of the cover body (12) is arc-shaped and surrounds the lower side of the conveying roller (13). One side of the cover body (12) close to the glass belt (2) entering the housing (1) is the high end, and one end of the cover body (12) close to the glass belt (2) leaving the housing (1) is the low end.

10. A production process of scratch-resistant low-emissivity glass, applicable to the coating device for processing the scratch-resistant low-emissivity glass described in any one of claims 1 to 9, characterized in that, It includes the following steps: Step 1: Pull the glass belt (2) out of the tin bath and convey it into the housing (1). When the glass belt (2) is fed into the housing (1), the temperature is 400°-700°. Step 2: The glass belt (2) is continuously conveyed in the housing (1) through the conveying roller (13). During the conveying process, on the support section (131) of the conveying roller (13), it supports the glass belt (2), and the empty section (135) provides a mixed gas of sulfur dioxide and nitrogen to the glass belt (2), so that the sulfur dioxide gas reacts with the surface of the glass belt (2) at a high temperature to form a sodium sulfate protective film. Step 3: Feed the glass ribbon (2) forming the protective film into an annealing furnace for cooling.

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