Air flow control device at lower part of ultrathin electronic glass annealing kiln
By installing partition devices in the slag box and annealing kiln area A of the ultra-thin electronic glass production line, the temperature fluctuations and cutting problems caused by airflow hedging are solved, and a higher yield and a more uniform sulfur film distribution are achieved.
Patent Information
- Application Number
- CN202411716586.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-02-18
AI Technical Summary
The hedging of the backward airflow in the lower part of the slag box and the forward airflow in the annealing kiln area A will cause large local temperature fluctuations, resulting in poor cutting of ultra-thin electronic glass and explosive plates, as well as contamination of the rollers.
The first and second barrier curtains are installed in the slag box and the annealing kiln area A respectively to form two partition devices to avoid airflow hedging. The first and second barrier curtains are both arranged under the transport rollers, and a folded structure is provided inside, with the top end located above the sulfur dioxide tube.
By effectively controlling the airflow, cutting losses and frying plate losses are reduced, yields are improved, and the uniformity and thickness of sulfur film under the glass plate are improved.
Smart Images
Figure CN119461812A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of airflow control devices, in particular to an airflow control device for the lower part of an ultra-thin electronic glass annealing furnace. Background Art
[0002] The traditional slag box and annealing furnace curtain and partition devices of ultra-thin electronic glass are all located in the upper area of the glass plate, that is, they only block the airflow in the tin bath outlet, slag box and upper area of the annealing furnace. The lower area is designed to be connected. A lower partition device will be designed in the 1#-3# roller area under the slag box, and a lower partition will be designed at the outlet of Zone A of the annealing furnace. There is no partition device at the bottom of the area between the 3# roller of the slag box and the outlet of Zone A of the annealing furnace.
[0003] The interior of the annealing furnace is in a negative pressure state. Due to the pressure difference in the open area where the slag box and the annealing furnace are connected, the airflow at the end of Zone A of the annealing furnace flows forward. Due to the pressure difference between the positive pressure in the tin bath and the negative pressure at the bottom of the slag box, the airflow at the bottom of the slag box flows backward. The airflow at the bottom of the annealing furnace and the airflow at the bottom of the slag box will inevitably collide, causing large fluctuations in the local temperature field, resulting in poor cutting and board explosion. At the same time, the exhaust gas at the outlet of the tin bath will enter the front area of Zone A of the annealing furnace and pollute the roller. The slag box and Zone A of the annealing furnace use sulfur dioxide for rapid discharge, resulting in a short residence time of sulfur dioxide and poor quality of the sulfur film under the board. Summary of the invention
[0004] The technical problem to be solved by the present invention is that the impact of the backward airflow at the bottom of the slag box and the forward airflow in the annealing furnace A zone will cause large fluctuations in the local temperature field, resulting in poor cutting and explosion of ultra-thin electronic glass and pollution of the roller table.
[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: an airflow control device at the bottom of an ultra-thin electronic glass annealing furnace, comprising a first curtain and a second curtain respectively arranged at the bottom of a slag box and an annealing furnace zone A, the first curtain and the second curtain are both arranged below a transport roller, and a folding structure is provided inside the first curtain and the second curtain, and the top ends of the first curtain and the second curtain are both located above the sulfur dioxide pipe in the slag box and the annealing furnace zone A.
[0006] Preferably, the first curtain and the second curtain both include a foldable corrugated plate and guide grooves fixedly arranged at the top and bottom of the corrugated plate, one end of the corrugated plate is fixedly set, and the other end is connected to a movable plate horizontally slidably arranged in the guide groove, and the two sides of the movable plate are respectively connected to two winding mechanisms by pull ropes.
[0007] Preferably, both ends of the movable plate are fixedly connected with annular protrusions, the guide groove is a U-shaped groove, and the side wall of the guide groove is provided with a guide groove for the annular protrusion to be inserted.
[0008] Preferably, moving blocks are installed at both ends of the moving plate, and rollers are rotatably arranged on the sides of the moving blocks that contact the inner bottom wall of the guide groove.
[0009] Preferably, a mounting block is fixed at the end of the movable plate, a mounting rod is vertically arranged on the mounting block, the movable block is vertically slidably connected to the mounting rod, and a spring is mounted on the mounting rod to push the movable block to contact the bottom wall of the guide groove.
[0010] Preferably, the first curtain and the second curtain are both detachably installed.
[0011] The method for using the lower airflow control device of the ultra-thin electronic glass annealing furnace comprises the following steps: Step 1: After the annealing furnace is started, the winding mechanism of the pull rope connected to the moving block is controlled to rewind. The winding mechanism drives the moving plate to slide on the guide groove through the pull rope and the moving block. The moving plate pulls the corrugated plate to open. At the same time, the winding mechanism connected to the pull rope in the middle of the moving plate is controlled to unwind synchronously. After the moving plate signal is detected at the end of the guide groove, the winding mechanisms on both sides of the corrugated plate are locked; Step 2: After the annealing furnace is closed, the winding mechanism connected to the two moving blocks is controlled to unwind synchronously, and the winding mechanism connected to the moving plate is controlled to rewind synchronously, and the corrugated plate in the open state is folded by pulling the moving plate. After the moving plate signal is detected at the other end of the guide groove, the winding mechanisms on both sides of the corrugated plate are locked.
[0012] Preferably, proximity switches are installed at both ends of the inner side of the guide groove, and the proximity switches are linked with all the winding mechanisms for controlling the winding mechanisms to be locked after the indirect switch detects the moving plate signal.
[0013] 1. The present invention provides an airflow control device for the lower part of an ultra-thin electronic glass annealing furnace. The first and second curtains are respectively installed on the slag box and the annealing furnace A zone to separate the lower part of the slag box outlet and the lower part of the annealing furnace A zone, thereby avoiding airflow collision, reducing 1.9% of cutting loss, reducing 1% of plate explosion loss, and improving the cumulative comprehensive yield by 2.9%. In addition, the first and second curtains are used to form a local box body in the lower area of the slag box and a part of the lower area of the annealing furnace A zone, so that the state of the sulfur film under the glass plate is significantly improved, and the state of the sulfur film uniformly distributed on the whole plate and the good thickness of the sulfur film is basically achieved.
[0014] 2. The lower airflow control device is used to effectively control the uneven residual stress of the glass plate, thereby extending the residence time of sulfur dioxide in the area. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Figure 1 It is a schematic structural diagram of an embodiment of the present invention.
[0016] Figure 2 Schematic diagram of the structure of the lower curtain in an embodiment of the present invention.
[0017] Figure 3 Schematic diagram of the structure of the guide groove in the embodiment of the present invention.
[0018] Figure 4 This is a picture of the sulfur film of the product produced in the prior art.
[0019] Figure 5 This is a picture of the sulfur film of the product produced by the embodiment of the present invention.
[0020] In the figure: 1. first curtain; 2. second curtain; 3. sulfur dioxide tube; 4. glass belt; 5. slag box; 6. annealing furnace A zone; 7. slag box partition space; 8. annealing furnace partition space; 9. transport roller; 10. guide groove; 11. corrugated plate; 12. movable plate; 13. mounting block; 14. movable block. DETAILED DESCRIPTION
[0021] like Figure 1-3 As shown, the present invention proposes a lower airflow control device for an ultra-thin electronic glass annealing furnace, comprising a first curtain 1 and a second curtain 2 respectively arranged at the bottom of a slag box 5 and an inner bottom of an inner zone A 6 of the annealing furnace, the first curtain 1 and the second curtain 2 are both arranged below a transport roller 9, and a folding structure is provided inside the first curtain 1 and the second curtain 2, and the top ends of the first curtain 1 and the second curtain 2 are both located above the sulfur dioxide pipe 3 in the slag box 5 and the inner zone A 6 of the annealing furnace.
[0022] By installing a first curtain 1 at the lower part of the slag box 5 and a second curtain 2 in the annealing furnace zone A, two partition devices are formed, which effectively alleviates and controls the counter-airflow between the slag box 5 and the annealing furnace zone A 6, alleviates the instability of the local temperature field due to air flow, optimizes the problem of uneven local residual stress of the glass ribbon, and effectively reduces the cutting loss and the annealing furnace gate loss rate.
[0023] The first curtain 1 is installed between the 3# transport roller 9 and the 4# transport roller 9 in the slag box 5, and the second curtain 1 is installed between the 8# transport roller 9 and the 9# transport roller 9 in the annealing furnace A zone 6, so that two independent lower boxes are formed between the 1#-3# rollers in the slag box 5 and the 4#-9# rollers in the annealing furnace A zone 6, namely the slag box partition space 7 and the annealing furnace partition space 8, so as to extend the residence time of the sulfur dioxide output from the sulfur dioxide pipe 3 in the slag box 5 and the annealing furnace A zone 6, so as to achieve the purpose of improving the uniformity and thickness of the sulfur film on the lower surface of the glass plate.
[0024] like Figure 1-3The first curtain 1 and the second curtain 2 both include a foldable corrugated plate 11 and guide grooves 10 fixedly arranged at the top and bottom of the corrugated plate 11, one end of the corrugated plate 11 is fixedly arranged, and the other end is connected to a movable plate 12 horizontally slidably arranged in the guide groove 10, and two sides of the movable plate 12 are respectively connected to two reeling mechanisms by pull ropes.
[0025] When inspecting the slag box 5 and the annealing furnace area A 6, it is necessary to open the first curtain 1 and the second curtain 2, and reel in the pull rope through the reeling mechanism close to the fixed end of the corrugated plate 11. The pull rope pulls the movable plate 12 to move along the guide groove 10. The guide groove 10 pushes the corrugated plate 11 to fold during the movement, thereby realizing the folding of the first curtain 1 or the second curtain 2; the subsequent restoration of the first curtain 1 or the second curtain 2 can be achieved by controlling the reeling of another reeling mechanism.
[0026] like Figure 3 As shown. Both ends of the moving plate 12 are fixedly connected with annular protrusions, the guide groove 10 is a U-shaped groove, and the side wall of the guide groove 10 is provided with a guide groove for the annular protrusion to be inserted. The guide groove is provided on the side wall of the guide groove 10 to improve the stability of the movement of the moving plate 12, and the end wall of the moving plate 12 is directly in contact with the bottom wall of the guide groove 10. The moving plate 12 is used as a whole for support during traction, and the structural form of the annular protrusion can reduce friction.
[0027] like Figure 1-3 As shown. Both ends of the moving plate 12 are equipped with moving blocks 14, and rollers are rotatably arranged on the side where the moving block 14 contacts the inner bottom wall of the guide groove 10. The moving block 14 directly contacts the bottom wall of the guide groove 10, and the moving block 14 is entirely located in the guide groove 10. The movement of the moving block 14 is limited by the guide groove 10 to ensure the stability of the movement.
[0028] like Figure 2 and Figure 3 The end of the movable plate 12 is fixed with a mounting block 13, on which a mounting rod is vertically arranged, and the movable block 14 is vertically slidably connected to the mounting rod, on which a spring is sleeved to push the movable block 14 to contact the inner bottom wall of the guide groove 10.
[0029] The spring provides elastic force for the moving block 14 to press the moving block 14 tightly in the guide groove 10. When the moving block 14 moves with the moving plate 12, the roller in the moving block 14 provides rolling support to reduce friction.
[0030] As a preferred embodiment of the present invention, the first curtain 1 and the second curtain 2 are both detachably installed, and the distance between the first curtain 1 and the second curtain 2 can be adjusted according to the cutting length of the ultra-thin electronic glass.
[0031] After using the airflow control device, the airflow in the slag box 5 and the lower part of the annealing furnace A zone 6 can be effectively controlled, the problem of uneven stress of the glass plate can be solved, and the loss caused by poor cutting and the loss of the plate bursting in the annealing furnace F zone can be reduced; at the same time, two independent lower boxes are formed, the residence time of sulfur dioxide is extended, and the uniformity and thickness of the sulfur film are improved.
[0032] The method for using the lower airflow control device of the ultra-thin electronic glass annealing furnace comprises the following steps: Step 1: After the annealing furnace is started, the winding mechanism of the pull rope connected to the moving block 14 is controlled to rewind. The rewinding mechanism drives the moving plate 12 to slide on the guide groove 10 through the pull rope and the moving block 14. The moving plate 12 pulls the corrugated plate 11 to open. At the same time, the winding mechanism connected to the pull rope in the middle of the moving plate 12 is controlled to unwind synchronously. After the moving plate 12 signal is detected at the end of the guide groove 10, the winding mechanisms on both sides of the corrugated plate 11 are locked; Step 2: After the annealing furnace is closed, the winding mechanism connected to the two moving blocks 14 is controlled to unwind synchronously, and the winding mechanism connected to the moving plate 12 is controlled to rewind synchronously. The corrugated plate 11 in the open state is folded by pulling the moving plate 12. After the moving plate 12 signal is detected at the other end of the guide groove 10, the winding mechanisms on both sides of the corrugated plate 11 are locked.
[0033] Proximity switches are installed at both ends of the inner side of the guide groove 10, and the proximity switches are linked with all the winding mechanisms for control. After the indirect switch detects the signal of the moving plate 12, the winding mechanism is controlled to be locked.
[0034] Case 1: Before the device was used, the cutting loss rate fluctuated significantly, and the plate exploded frequently in the F zone of the annealing furnace. After the airflow control device was used, the cutting loss rate at the cold end was greatly reduced, and the plate exploded in the F zone of the annealing furnace was effectively controlled:
[0035] From the summary data of yield loss in the above 10-day cycle, it can be seen that after the use of this device, the cutting loss rate and the board explosion loss rate were greatly reduced, the daily yield loss was reduced from 3.5% to 0.6%, and the daily comprehensive yield was increased by 2.9%.
[0036] Case 2: Before using this device, the sulfur film under the glass plate was uneven and thin. After using this device, the sulfur film under the glass plate was uniform and thicker:
[0037] After using this device, the state of the sulfur film under the glass plate is significantly improved, the uniformity of the sulfur film on the entire plate is good, and the thickness of the sulfur film is greatly increased.
Claims
1. The lower airflow control device of ultra-thin electronic glass annealing furnace is characterized by: The invention comprises a first curtain (1) and a second curtain (2) which are arranged at the bottom of a slag box (5) and an annealing furnace A zone (6) respectively, the first curtain (1) and the second curtain (2) are arranged below a transport roller (9), and a folding structure is provided inside the first curtain (1) and the second curtain (2), and the top ends of the first curtain (1) and the second curtain (2) are located above a sulfur dioxide pipe (3) in the slag box (5) and the annealing furnace A zone (6).
2. The lower airflow control device of the ultra-thin electronic glass annealing furnace according to claim 1, characterized in that: The first barrier curtain (1) and the second barrier curtain (2) both comprise a foldable corrugated plate (11) and guide grooves (10) fixedly arranged at the top and bottom of the corrugated plate (11); one end of the corrugated plate (11) is fixedly arranged, and the other end is connected to a movable plate (12) horizontally slidably arranged in the guide groove (10); two sides of the movable plate (12) are respectively connected to two reeling mechanisms via pull ropes.
3. The lower airflow control device of the ultra-thin electronic glass annealing furnace according to claim 2, characterized in that: Both ends of the movable plate (12) are fixedly connected with an annular protrusion, the guide groove (10) is a U-shaped groove, and the side wall of the guide groove (10) is provided with a guide groove for the annular protrusion to be inserted.
4. The lower airflow control device of the ultra-thin electronic glass annealing furnace according to claim 2, characterized in that: Moving blocks (14) are installed at both ends of the moving plate (12), and rollers are rotatably arranged on the sides of the moving blocks (14) that contact the inner bottom wall of the guide groove (10).
5. The lower airflow control device of the ultra-thin electronic glass annealing furnace according to claim 4, characterized in that: A mounting block (13) is fixed to the end of the movable plate (12), a mounting rod is vertically arranged on the mounting block (13), the movable block (14) is vertically slidably connected to the mounting rod, and a spring is sleeved on the mounting rod for pushing the movable block (14) to contact the inner bottom wall of the guide groove (10).
6. The lower airflow control device of the ultra-thin electronic glass annealing furnace according to claim 1, characterized in that: The first barrier curtain (1) and the second barrier curtain (2) are both detachably installed.
7. The method for using the lower airflow control device of the ultra-thin electronic glass annealing furnace according to any one of claims 1 to 6, characterized in that: The steps include: Step 1: After the annealing furnace is started, the winding mechanism of the pull rope connected to the moving block (14) is controlled to rewind, and the rewinding mechanism drives the moving plate (12) to slide on the guide groove (10) through the pull rope and the moving block (14). The moving plate (12) pulls the corrugated plate (11) to open, and at the same time, the winding mechanism connected to the pull rope in the middle of the moving plate (12) is controlled to unwind synchronously. After the moving plate (12) signal is detected at the end of the guide groove (10), the winding mechanisms on both sides of the corrugated plate (11) are locked; Step 2: After the annealing furnace is closed, the winding mechanism connected to the two moving blocks (14) is controlled to unwind synchronously, and the winding mechanism connected to the moving plate (12) is controlled to rewind synchronously, so that the corrugated plate (11) in the opened state is folded by pulling the moving plate (12), and after the signal of the moving plate (12) is detected at the other end of the guide groove (10), the winding mechanisms on both sides of the corrugated plate (11) are locked.
8. The method for using the lower airflow control device of the ultra-thin electronic glass annealing furnace as claimed in claim 7, characterized in that: Proximity switches are installed at both ends of the inner side of the guide groove (10), and the proximity switches are linked with all the winding mechanisms for control. When the indirect switch detects a signal from the moving plate (12), the winding mechanism is controlled to be locked.