A coating device for scratch-resistant low-emissivity glass processing and its production process

Abstract

The present invention discloses a coating device for processing scratch-resistant low-emissivity glass and its production process, relating to the technical field of glass float process preparation. The coating device for processing scratch-resistant low-emissivity glass comprises a housing and conveyor rollers disposed within the housing. The conveyor rollers are arranged side by side within the housing to form a glass ribbon conveying module. The conveyor rollers are composed of a supporting section and a blank section, and the blank sections and the supporting section are arranged in an alternating manner. The supporting section is used to support and convey the glass ribbon, and protective gas is sprayed from the blank section. By providing the blank section on the conveyor roller and spraying protective gas from the blank section, the contact portion of the glass ribbon is not affected when the conveyor roller contacts the glass ribbon. Adjacent blank sections of two adjacent conveyor rollers are staggered, 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.

Description

Technical Field

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

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

[0003] In the prior art, SO2 gas is usually sprayed under the roller. The sprayed gas moves upward, contacts the lower surface of the glass ribbon, and reacts to form a protective film. 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 generated protective film has poor uniformity. In addition, after the protective gas reacts, the concentration of SO2 gas in the local area will decrease, further reducing the uniformity of the protective film thickness. Summary of the Invention

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

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

[0006] Furthermore, an impeller is provided in the empty section, and the diameter of the impeller is smaller than that of the supporting section. The impeller includes: a hollow tube, the interior of the hollow tube is used to accommodate protective gas; blades, a plurality of blades are provided, and the plurality of blades are fixed on the surface of the hollow tube in a circular array, and gaps are left between adjacent blades; a first air supply hole, the first air supply hole is opened on the surface of the hollow tube, and is located in the gap between adjacent blades; a sealing cover, the sealing cover is fixed at both ends of the hollow tube to close both ends of the hollow tube.

[0007] Furthermore, the single blade has a concave side and a protruding side, and the impeller rotates toward the concave side; and the first air supply hole is inclined toward the concave side of the blade.

[0008] Furthermore, a second hollow shaft is axially provided at the axis center of the impeller, and the second hollow shaft passes 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, and the protective gas introduced at one end of the second hollow shaft enters the first air inlet chamber, and the protective gas introduced at the other end of the second hollow shaft enters the second air inlet chamber; a second air vent is provided on the outer surface of the second hollow shaft, and the second air vent is symmetrically arranged about the partition plate, so that the first air inlet chamber and the second air inlet chamber are both connected to the interior of the hollow tube.

[0009] Furthermore, shield plates are fixedly provided on both sides of the interior of the shell, the shield plates are parallel to the glass strip, and there is a certain distance between the shield plates and the glass strip; an air blocking plate is provided at one end of the shell, and a certain distance is left between the upper end of the air blocking plate and the lower surface of the glass strip, and an exhaust port is provided on the side of the air blocking plate close to the conveying roller; an exhaust pipe is provided on the side of the air blocking plate away from the conveying roller, and a channel is provided between the exhaust pipe and the exhaust port, and the channel is used to connect the exhaust port with the inside of the exhaust pipe; the cross section of the channel close to the exhaust port is larger than that of the end close to the exhaust pipe.

[0010] Furthermore, 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; a first hollow shaft is fixedly provided on both ends of the conveying roller, and the conveying roller and the first hollow shaft are both sleeved on the outer circumference of the second hollow shaft, and 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 segments, and there are multiple connecting rods, and the multiple connecting rods are arranged around the impeller, so that when a single support segment rotates, all support segments on the conveying roller are driven to rotate.

[0011] Furthermore, a slide is provided in the hollow tube, and the slide can move axially along the hollow tube; one end of the slide is open, and the other end of the slide is penetrated by the second hollow shaft, and the slide is slidingly and sealingly connected to the second hollow shaft; a first spring is provided between the penetrated end of the slide and the cover, and the first spring has a reset effect on the slide; a first air vent is provided on the surface of the slide, and the first air vent corresponds one-to-one to the first air supply hole.

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

[0013] Furthermore, a cover body is provided in the shell, and the cover body corresponds to the conveying roller one-to-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 where the glass ribbon enters the shell is the high end, and the end of the cover body close to where the glass ribbon leaves the shell is the low end.

[0014] The present invention also provides a scratch-resistant low-emissivity glass production process, which is applicable to any of the above-mentioned scratch-resistant low-emissivity glass processing coating devices, comprising the following steps:

[0015] Step 1: Pull the glass ribbon out of the tin pool and convey it into the shell. The temperature of the glass ribbon when it is conveyed into the shell is 400°-700°;

[0016] Step 2: The glass ribbon is continuously conveyed through the conveyor rollers in the housing. During the conveying process, the supporting section on the conveyor rollers 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;

[0017] Step 3: Send the glass ribbon with the protective film formed into an annealing furnace for cooling.

[0018] The present invention has the following beneficial effects:

[0019] (1) The coating device for processing scratch-resistant low-emissivity glass is characterized in that a blank section is provided on the conveying roller and protective gas is sprayed at the blank section, so that when the conveying roller contacts the glass ribbon, the contact portion of the glass ribbon is not affected. Adjacent blank sections of two adjacent conveying rollers are staggered, 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.

[0020] (2) The coating device for processing scratch-resistant low-emissivity glass is configured to provide an impeller at the empty section and drive the impeller and the conveying roller to rotate respectively, so that the impeller can push the gas in the shell 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.

[0021] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a front view of the overall structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of the cover body and a single conveying roller of the present invention;

[0025] Figure 4 This is a schematic diagram of the distribution of multiple conveying rollers inside the housing of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of the conveying roller and the impeller of the present invention;

[0027] Figure 6 This is an exploded view of the conveyor roller and impeller structure of the present invention;

[0028] Figure 7 This is another structural schematic diagram of the conveying roller of the present invention;

[0029] Figure 8 This is an exploded view of the impeller structure of the present invention;

[0030] Figure 9 This is a front cross-sectional view of the internal structure of the impeller of the present invention;

[0031] Figure 10 It is a side sectional view of the internal structure of the impeller of the present invention;

[0032] Figure 11 This is a schematic diagram of the internal structure of the second hollow shaft of the present invention;

[0033] Figure 12 For the present invention Figure 2 Enlarged schematic diagram of area A in the middle;

[0034] Figure 13 For the present invention Figure 2 Enlarged schematic diagram of area B in the middle;

[0035] Figure 14 This is a side sectional view of the air blocking plate of the present invention;

[0036] Figure 15 For the present invention Figure 14 Enlarged schematic diagram of area C in the middle;

[0037] Figure 16 This is a diagram showing the coordination between the cover body and the conveying roller of the present invention.

[0038] In the figure, 1, housing; 2, glass ribbon; 3, shield; 4, support platform; 5, first fixing plate; 6, second fixing plate; 7, first gear; 8, second gear; 9, third gear; 10, air slip ring; 11, connecting pipe; 12, cover; 13, conveying roller; 131, supporting section; 132, impeller; 1321, hollow tube; 1322, blade; 1323, first air supply hole; 1324, cover; 1325, screw; 1326 , slide; 1327, first air vent; 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 cavity; 153, second air inlet cavity; 154, second air vent; 16, air blocking plate; 17, exhaust port; 18, exhaust pipe; 19, aisle; 191, straight plate; 192, folding plate. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 understood as limiting the present invention.

[0041] Refer to the following Figure 1 - Figure 16 , describes the coating device for processing scratch-resistant low-emissivity glass and its production process provided by an embodiment of the present invention.

[0042] In one aspect, the present invention provides a first coating device for processing scratch-resistant low-emissivity glass.

[0043] See also Figure 1 - Figure 7The coating device for processing scratch-resistant low-emissivity glass includes a housing 1, one side of the housing 1 is a tin pool, and the other side is an annealing furnace (the tin pool and the annealing furnace are not shown in the figure). A plurality of conveying rollers 13 are arranged in parallel in the housing 1 to form a conveying module for the glass ribbon 2. The glass ribbon 2 pulled out of the tin pool is conveyed into the annealing furnace by the plurality of conveying rollers 13. The temperature of the glass ribbon 2 in the housing 1 is about 600°C. The conveying rollers 13 include a supporting section 131 and an empty section 135. The empty section 135 is distributed along the axial direction of the supporting section 131. The supporting section 131 is used to support and convey the glass ribbon 2. The protective gas can be sprayed from the empty section 135 of the glass ribbon 2. The support sections 131 on the two adjacent conveying rollers 13 are staggered. At this time, the empty sections 135 are also staggered. For example, the middle of one conveying roller 13 is the empty section 135 and the two sides are support sections 131. Then, the middle of the other adjacent conveying roller 13 is the support section 131 and the two sides are empty sections 135, so that the sprayed 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 set on one conveying roller 13, and the empty sections 135 and the support sections 131 are arranged crosswise (such as Figure 7 shown).

[0044] And, combined with Figure 6 A connecting rod 133 is provided between adjacent support segments 131. There are multiple connecting rods 133, which are arranged in a circular array around the axis of the support segment 131. The connecting rods 133 are used to fix the coaxially spaced support segments 131 as a whole and avoid obstruction to 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 ribbon 2. When the connecting rod 133 is located at the edge of the conveying roller 13, one end of the connecting rod 133 will not be fixed. At this time, a side roller 134 can be fixed at the edge of the conveying roller 13, and one end of the connecting rod 133 is fixed 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 shorter than that of the support segment 131, thereby reducing the occupation of the empty segment 135.

[0045] In the prior art, long rollers are usually provided for conveying the glass ribbon 2. Holes are formed in the long rollers, and protective gas is ejected from the holes. Since the long rollers are in a state of continuous rotation, when the outlet of the holes contacts the lower surface of the glass ribbon 2, the glass ribbon 2 will block the gas outlet of the holes. In the worst case, the airflow near the holes is disturbed, which in turn causes uneven thickness of the Na2SO4 film. When the airflow pressure is high, the portion of the glass ribbon 2 located at the holes may be subjected to large local pressure, causing local deformation of the glass ribbon 2 (the glass ribbon 2 is soft when not cooled). Compared with the prior art, the protective gas is ejected at the empty section 135, so that when the conveying rollers 13 contact the glass ribbon 2, the contact portion of the glass ribbon 2 is not affected. The adjacent empty sections 135 of two adjacent conveying rollers 13 are staggered, so that the protective gas is evenly distributed on the lower surface of the glass ribbon 2, thereby improving the uniformity of the thickness of the formed Na2SO4 film.

[0046] Combine Figure 5 - Figure 10 To facilitate the ejection of shielding gas from the empty section 135, an impeller 132 is disposed within the empty section 135. Impeller 132 is coaxial with the empty section 135 and has a smaller diameter than the support section 131, allowing the connecting rod 133 to surround the impeller 132. Impeller 132 includes a hollow tube 1321, which serves as the main body of impeller 132 and contains shielding gas. Furthermore, a plurality of blades 1322 are disposed on the surface of the hollow tube 1321. These blades 1322 are arranged in a circular array, with gaps between adjacent blades 1322. As the blades 1322 rotate with the hollow tube 1321, they propel the gas around them. The hollow tubes 1321 on each conveyor roller 13 rotate in the same direction, thereby promoting the flow of gas within the housing 1 in a single direction.

[0047] In addition, a first air supply hole 1323 is opened on the surface of the hollow tube 1321. The first air supply hole 1323 is located in the gap between adjacent blades 1322. The first air supply hole 1323 can supply the protective gas in the hollow tube 1321 to the outside.

[0048] Furthermore, sealing covers 1324 are fixed at both ends of the hollow tube 1321 . The sealing covers 1324 are fixed to both ends of the hollow tube 1321 by screws 1325 to seal both ends of the hollow tube 1321 and prevent the protective gas from leaking from both ends of the hollow tube 1321 .

[0049] In this embodiment, combined with Figure 10 A single blade 1322 has a concave side and a protruding side. Preferably, the concave side of the blade 1322 faces the conveying direction of the glass ribbon 2. The hollow tube 1321 drives the impeller 132 to rotate toward the concave side, thereby causing the protective gas in the shell 1 to flow in the opposite direction toward the movement of the glass ribbon 2.

[0050] Furthermore, the first air supply hole 1323 is inclined toward 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 , thereby improving the pushing effect of the blade 1322 on the protective gas.

[0051] Combine Figure 9 - Figure 11 In order to facilitate the delivery of protective gas into the hollow tube 1321, a second hollow shaft 15 is axially provided at the axis center of the impeller 132. The second hollow shaft 15 passes through the cover 1324 and is fixedly connected to the cover 1324. When the second hollow shaft 15 rotates, it can drive the hollow tube 1321 to rotate together.

[0052] Furthermore, in order to ensure that the shielding gas delivered from the second hollow shaft 15 is evenly delivered in the axial direction, a partition plate 151 is provided in the second hollow shaft 15. The partition plate 151 divides the space in the second hollow shaft 15 into a first air inlet chamber 152 and a second air inlet chamber 153. Shielding 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 kept the same. The shielding gas introduced into one end of the second hollow shaft 15 enters the first air inlet chamber 152, and the shielding gas introduced into the other end of the second hollow shaft 15 enters the second air inlet chamber 153. 53, a second air vent 154 is opened on the outer surface of the second hollow shaft 15, and the second air vent 154 is symmetrically arranged about the partition plate 151, so that the first air inlet cavity 152 and the second air inlet cavity 153 are both connected to the interior of the hollow tube 1321. By making the gases at both ends flow in opposite directions in 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 when flowing outward along the second hollow shaft 15 is compensated, thereby making the gas flowing from the hollow tube 1321 into the shell 1 in a more uniform and stable state.

[0053] Combine Figure 8 - Figure 10In order to further improve the uniformity and stability of the protective gas flowing from the hollow tube 1321 to the shell 1, a slide 1326 is provided in the hollow tube 1321. The slide 1326 can move along the axial direction of the hollow tube 1321. One end of the slide 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 through end of the slide 1326 and the cover 1324. The first spring 1329 plays a reset role for the slide 1326. A first air vent 1327 is provided on the surface of the slide 1326. The first air vent 1327 corresponds one-to-one with the first air supply hole 1323. When the air pressure in the slide 1326 is insufficient, the first air hole 1327 and the first air supply hole 1323 are misaligned, and the protective gas in the slide 1326 cannot pass through the first air supply hole 1323. When the air pressure in the slide 1326 is sufficient, the first air hole 1327 is connected with the first air supply hole 1323, so that the protective gas passes through the first air supply hole 1323. A retaining ring 1328 is fixed at both ends of the inner wall of the hollow tube 1321. The retaining ring 1328 is used to limit the position of the slide 1326 so that the slide 1326 is located at the specified position.

[0054] Combine 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 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 shell 1, and a first fixed plate 5 is fixed on the support platform 4. The fixed end of the air slip ring 10 is installed on the first fixed plate 5, and the rotating end of the air slip ring 10 is fixed to the second hollow shaft 15. The protective gas is introduced from the fixed end of the air slip ring 10. For example, an air inlet pipe can be provided, and the air inlet pipe is connected to the fixed ends of all the air slip rings 10, so that the protective gas is input to all the air slip rings 10 at the same time. The interface of the rotating end of the air slip ring 10 is connected to the second hollow shaft 15 through the connecting pipe 11, and the protective gas is introduced into the rotating second hollow shaft 15. The second hollow shaft 15 has two air inlet ports, so two air inlet pipes need to be provided here.

[0055] Combine Figure 3 、 Figure 4 、 Figure 14 and Figure 15 In order to facilitate the discharge of the protective gas in the shell 1, shield plates 3 are fixed on both sides of the shell 1. The shield plates 3 are parallel to the glass ribbon 2, and there is a certain distance between the shield plates 3 and the glass ribbon 2. The distance between the shield plates 3 and the glass ribbon 2 is about 1 cm. The shield plates 3 can prevent the protective gas from overflowing from both ends of the glass ribbon 2, thereby reducing the waste of protective gas.

[0056] In addition, an air blocking plate 16 is provided at one end of the housing 1. Preferably, the air blocking plate 16 is provided on the side where the glass ribbon 2 leaves the housing 1. A certain distance is left between the upper end of the air blocking plate 16 and the lower surface of the glass ribbon 2. The distance between the upper end of the air blocking plate 16 and the lower surface of the glass ribbon 2 is about 1 cm, so that a gap is formed between the upper end of the air blocking plate 16 and the lower surface of the glass ribbon 2. An exhaust port 17 is provided on the side of the air blocking plate 16 close to the conveying roller 13, and an exhaust pipe 18 is provided on the side of the air blocking plate 16 away from the conveying roller 13. The exhaust pipe 18 is connected to the exhaust port 17. 7 is provided with a channel 19. Preferably, the channel 19 is formed by combining a straight plate 191 and a folded plate 192, and the cross-section of the channel 19 near the exhaust port 17 is larger than the cross-section of the end near the exhaust pipe 18. The channel 19 is used to connect the exhaust port 17 with the inside of the exhaust pipe 18, and the exhaust pipe 18 is connected to the exhaust fan (not shown in the figure) to suck the gas in the exhaust pipe 18. When the protective gas passes through the channel 19, the cross-section of the channel 19 changes from large to small, the flow rate of the gas is accelerated, thereby improving the gas suction speed.

[0057] Combine Figure 3 、 Figure 4 and Figure 16 Optionally, in order to concentrate the protective gas on the lower side of the glass ribbon 2, a cover body 12 is provided in the shell 1. 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, thereby preventing the gas from escaping from the lower side of the conveying roller 13. The cover body 12 has a high side and a low side. The high side of the cover body 12 is close to the side where the glass ribbon 2 enters the shell 1. Preferably, the high side of the cover body 12 is arc-shaped to deflect the protective gas toward the lower surface of the glass ribbon 2. The low side of the cover body 12 is close to the side where the glass ribbon 2 leaves the shell 1, so that the gas ejected from the empty section 135 flows toward the low side of the cover body 12. Adjacent covers 12 are fitted to each other and arranged without gaps.

[0058] Combine Figure 1 、 Figure 3 、 Figure 12 and Figure 13 In order to facilitate the driving of the second hollow shaft 15 to rotate, a first gear 7 is fixed at one end of each second hollow shaft 15, and the first gear 7 can drive the second hollow shaft 15 to rotate. A third gear 9 is provided between adjacent first gears 7, and the third gear 9 can be installed on the housing 1. A second fixed plate 6 can be provided on the support platform 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 is engaged with the first gears 7 on both sides. When driving is required, a first gear 7 can be selected as a 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, in order to reduce the load of the motor, multiple first gears 7 can be selected as driving gears.

[0059] In addition, a first hollow shaft 14 is fixed at both ends of the conveying roller 13. The conveying roller 13 and the first hollow shaft 14 are both sleeved on the outer circumference of the second hollow shaft 15. A second gear 8 is fixed 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 the first gear 7, and the two can use the same structure.

[0060] The first hollow shaft 14 and the second hollow shaft 15 rotate separately so that when the rotation speed of the second hollow shaft 15 is increased, the first hollow shaft 14 is not affected, that is, the conveying speed of the glass ribbon 2 is not affected, thereby adjusting the flow speed of the gas in the shell 1.

[0061] When in use (operating), the support sections 131 on two adjacent conveyor rollers 13 are staggered, and the second gear 8 drives the conveyor rollers 13 to rotate, thereby driving the glass ribbon 2 to move in the housing 1. Protective gas is introduced into the second hollow shaft 15 and discharged into the housing 1 at the empty section 135 through the impeller 132. At the same time, the first gear 7 drives the second hollow shaft 15 to rotate, causing the impeller 132 to rotate synchronously, thereby promoting the gas in the housing 1 to flow toward the side where the glass ribbon 2 leaves the housing 1.

[0062] The present invention also provides a scratch-resistant low-emissivity glass production process, which is applicable to the above-mentioned scratch-resistant low-emissivity glass processing coating device, comprising the following steps:

[0063] Step 1: Pull the glass ribbon 2 out of the tin pool and convey it into the shell 1. The temperature of the glass ribbon 2 when it is conveyed into the shell 1 is 400°-700°;

[0064] Step 2: The glass ribbon 2 is continuously conveyed within the housing 1 by the conveying rollers 13. During the conveying process, the supporting segments 131 on the conveying rollers 13 support the glass ribbon 2, and the empty segments 135 provide a mixed gas of sulfur dioxide and nitrogen to the glass ribbon 2, causing the sulfur dioxide gas to react with the surface of the glass ribbon 2 at a high temperature to form a sodium sulfate protective film.

[0065] Step 3: Sending the glass ribbon 2 with the protective film formed thereon 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 in 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 ribbon (2); the conveying rollers (13) are composed of a supporting section (131) and an empty section (135); the empty section (135) and the supporting section (131) are arranged in a staggered manner; The support section (131) is used to support and convey the glass ribbon (2); protective gas is sprayed from the empty section (135); and the support sections (131) on two adjacent conveying rollers (13) are staggered. An impeller (132) is provided in the empty section (135), wherein the diameter of the impeller (132) is smaller than that of the supporting section (131), and the impeller (132) comprises: A hollow tube (1321), wherein the interior of the hollow tube (1321) is used to accommodate a protective gas; Blades (1322), wherein a plurality of blades (1322) are provided, and the plurality of blades (1322) are fixedly arranged on the surface of the hollow tube (1321) in a circular array, with gaps being left between adjacent blades (1322); A first air supply hole (1323), wherein the first air supply hole (1323) is provided on the surface of the hollow tube (1321) and is located in the gap between adjacent blades (1322).

2. The coating device for processing scratch-resistant low-emissivity glass according to claim 1, characterized in that: Also includes: The sealing covers (1324) are fixedly mounted on both ends of the hollow tube (1321), thereby sealing 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: The single blade (1322) has a concave side and a protruding side, and the impeller (132) rotates toward the concave side; The first air supply hole (1323) is inclined toward the recessed side of the blade (1322).

4. The coating device for processing scratch-resistant low-emissivity glass according to claim 3, characterized in that: A second hollow shaft (15) is axially provided at the axis of the impeller (132), and the second hollow shaft (15) passes through the sealing cover (1324); A partition plate (151) is provided in the second hollow shaft (15), and the partition plate (151) divides the space in the second hollow shaft (15) into a first air inlet chamber (152) and a second air inlet chamber (153); 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); The outer surface of the second hollow shaft (15) is provided with second air holes (154), and the second air 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 in communication with the interior of the hollow tube (1321).

5. The coating device for processing scratch-resistant low-emissivity glass according to claim 4, characterized in that: Shields (3) are fixedly provided on both sides of the interior of the shell (1), the shields (3) are parallel to the glass strip (2), and there is a certain distance between the shields (3) and the glass strip (2); An air blocking plate (16) is provided at one end of the shell (1), a certain distance is left between the upper end of the air blocking plate (16) and the lower surface of the glass ribbon (2), and an exhaust port (17) is provided on a side of the air blocking plate (16) close to the conveying roller (13); An exhaust pipe (18) is provided on a side of the air blocking plate (16) away from the conveying roller (13), and a channel (19) is provided between the exhaust pipe (18) and the exhaust port (17), and the channel (19) is used to connect the exhaust port (17) with the interior of the exhaust pipe (18); The cross section of the clamping channel (19) at one end close to the exhaust port (17) is larger than that at one 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: A first gear (7) is fixedly provided on one side of the second hollow shaft (15), and the first gear (7) is used to drive the second hollow shaft (15) to rotate; A first hollow shaft (14) is fixedly provided at both ends of the conveying roller (13), and the conveying roller (13) and the first hollow shaft (14) are both sleeved on the outer circumference of the second hollow shaft (15). A second gear (8) is fixedly provided on one side of the first hollow shaft (14), and the second gear (8) is used to drive the conveying roller (13) to rotate; Connecting rods (133) are provided between adjacent supporting sections (131), and a plurality of connecting rods (133) are provided. The plurality of connecting rods (133) are arranged around the impeller (132).

7. The coating device for processing scratch-resistant low-emissivity glass according to claim 6, characterized in that: A slide cylinder (1326) is provided in the hollow tube (1321), and the slide cylinder (1326) is capable of moving axially along the hollow tube (1321); One end of the slide cylinder (1326) is open, the other end of the slide cylinder (1326) is penetrated by the second hollow shaft (15), and the slide cylinder (1326) and the second hollow shaft (15) are connected in a sliding and sealing manner; A first spring (1329) is provided between the through end of the slide (1326) and the cover (1324), and the first spring (1329) serves to reset the slide (1326); A first air vent (1327) is provided on the surface of the slide cylinder (1326), and the first air vent (1327) corresponds one-to-one to the first air supply hole (1323).

8. The coating device for processing scratch-resistant low-emissivity glass according to claim 7, characterized in that: Air slip rings (10) are installed at both ends of the second hollow shaft (15), the fixed end of the air slip ring (10) has an air inlet, and the rotating end of the air slip ring (10) is connected to 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, characterized in that: A cover body (12) is provided in the shell (1), the cover body (12) corresponds to the conveying roller (13) one by one, and the lower side of the cover body (12) is arc-shaped and surrounds the lower side of the conveying roller (13); The side of the cover body (12) close to where the glass ribbon (2) enters the shell (1) is the high end, and the end of the cover body (12) close to where the glass ribbon (2) leaves the shell (1) is the low end.

10. A process for producing scratch-resistant low-emissivity glass, using the coating device for processing scratch-resistant low-emissivity glass according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Pull the glass ribbon (2) out of the tin pool and convey it into the shell (1). The temperature of the glass ribbon (2) when conveying it into the shell (1) is 400°-700°; Step 2: The glass ribbon (2) is continuously conveyed in the housing (1) via the conveying roller (13). During the conveying process, the supporting section (131) on the conveying roller (13) supports the glass ribbon (2), and the empty section (135) provides a mixed gas of sulfur dioxide and nitrogen to the glass ribbon (2), so that the sulfur dioxide gas reacts with the surface of the glass ribbon (2) at a high temperature to form a sodium sulfate protective film. Step 3: Send the glass ribbon (2) with the protective film formed thereon into an annealing furnace for cooling.

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