Device and method for finely controlling airflow at outlet of ultrathin float glass tin bath

Abstract

The invention discloses an ultrathin float glass tin bath outlet airflow fine control device which comprises lifting check curtains arranged at equal intervals in the conveying direction of a transition roller in a glass kiln, hot-wire anemometers are arranged between the adjacent lifting check curtains, and hot-wire anemometers are arranged between the lifting check curtain located at the end and a tin bath outlet. The hot-wire anemograph is in signal connection with the PLD control system, and the PLD control system is in control connection with the height adjusting unit of the hot-wire anemograph. Optimal standard control for achieving different production thicknesses is achieved, the overall apparent quality is improved, and therefore the purposes of achieving high production efficiency, improving quality, achieving standardized high-requirement production, reducing operation cost and improving market competitiveness are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of tin bath airflow control, in particular to a device and method for finely controlling airflow at an outlet of an ultra-thin float glass tin bath. Background Art

[0002] In the production process of ultra-thin float glass, the airflow control at the tin bath outlet is the key to product quality and product yield rate control. The traditional method of controlling the airflow at the tin bath outlet is mainly to have one person adjust the height of the curtain, and another person observe on site based on experience, and judge the current airflow changes by the glass plate type and other conditions, so as to make corresponding adjustments. The manual labor intensity is high, and it is impossible to accurately standardize the control, and it is impossible to achieve precision in the analysis and control of the yield rate and quality. Therefore, it is particularly important to further improve the refined control of the airflow at the tin bath outlet, scientifically evaluate and analyze the airflow changes, and further improve the yield rate and quality. Summary of the invention

[0003] The purpose of the present invention is to further improve the fine control effect of the airflow at the tin bath outlet in the ultra-thin float glass industry and scientifically evaluate and analyze the airflow changes. The purpose of fine control of the airflow at the tin bath outlet can be achieved. On the one hand, the height of the curtain can be automatically controlled to improve the accuracy of the curtain height; on the other hand, the airflow change data at the tin bath outlet and the slag box area can be accurately controlled, the current working conditions of the tin bath outlet can be scientifically analyzed and evaluated, and standardized high-requirement production can be achieved.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a device for fine-tuning the airflow at the outlet of the tin bath of ultra-thin float glass, comprising lifting curtains equidistantly arranged along the conveying direction of the transition roller in the glass kiln, hot-wire anemometers are arranged between adjacent lifting curtains, and a hot-wire anemometer is arranged between the lifting curtain at the end and the tin bath outlet, the hot-wire anemometer signal is connected to the PLD control system, and the PLD control system controls the height adjustment unit connected to the hot-wire anemometer.

[0005] Preferably, the lifting curtain includes a horizontally fixed storage cylinder with an opening at the bottom of the storage cylinder, a horizontally rotatably arranged winding shaft for winding up the curtain in the storage cylinder, an encoder connected to the winding shaft, the encoder signal connected to the PLD control system, the other end of the winding shaft connected to the output shaft of the winding motor, and the PLD control system controls the winding motor.

[0006] Preferably, a counterweight plate is fixedly connected to the bottom end of the curtain, and a telescopic rod is connected between the counterweight plate and the storage tube.

[0007] Preferably, the counterweight plate is arranged along the width direction of the curtain, and the telescopic rods are equidistantly distributed along the length direction of the counterweight plate.

[0008] Preferably, a connecting frame is hingedly connected to the bottom of the storage cylinder, the outer cylinder section of the telescopic rod is fixedly connected to the connecting frame, and an electric push rod is hingedly connected between the connecting frame and the storage cylinder.

[0009] Preferably, the connecting frame as a whole is a rectangular frame structure, a fork-shaped rod is provided inside the connecting frame, and a connecting plate is fixedly connected to the connecting frame through the rod, the connecting plate is located in the middle of the connecting frame, the movable end of the electric push rod is hinged on the connecting plate, the outer wall of the storage tube is fixed with a mounting seat, and the tube end of the electric push rod is hinged on the mounting seat.

[0010] Preferably, the hot air anemometers are equidistantly distributed along the axial direction of the storage tube.

[0011] A control method for a refined airflow control device at an outlet of an ultra-thin float glass tin bath comprises the following steps: Step 1: The winding motor drives the winding shaft to rotate, and the winding shaft unwinds the curtain. The curtain moves vertically downward under the gravity of the counterweight plate, and drives the telescopic rod to extend. The recorded number of turns is fed back to the PLD control system through the encoder. The PLD control system displays the lowering amount of the curtain. When the displayed lowering amount reaches the set lowering amount, the winding motor is controlled to stop; Step 2: Record the yield and quality of the products produced, record the value of each hot-wire anemometer separately, and record the hot-wire anemometer value and the height of the curtain corresponding to the highest yield; Step 3: After determining the product type, according to the optimal curtain height in step 2 above, adjust the curtain height through the winding motor, measure the curtain height through the encoder, and make the curtain reach the set height; Step 4. When storing the lifting curtain, control the winding motor to drive the winding shaft to lift the curtain until the counterweight plate contacts the connecting frame and then stops the winding motor. Control the electric push rod to retract. The electric push rod lifts the connecting frame and the bottom end of the curtain, so that the connecting frame drives the curtain to rotate to a horizontal state. In subsequent use, control the electric push rod to fully extend, and the connecting frame is in a vertical state when it is fully extended.

[0012] 1. The present invention provides a device and method for finely controlling the airflow at the outlet of the tin bath of ultra-thin float glass. Four electric lifting mode curtains are designed at the outlet of the tin bath, and multi-point high-temperature resistant hot wire anemometer probes are designed at the entire area of ​​the transition roller. The electric lifting curtain structure is used to control the direction of the airflow and the pressure difference, and the high-temperature resistant hot wire anemometer is used to measure data, so as to further control the direction of the airflow change at the outlet of the tin bath and the slag box area. The curtain height control system and the tin bath outlet airflow system are designed to achieve a one-to-one correspondence between the curtain height and the tin bath outlet airflow data through a PLD control system (after scientific evaluation, the best value of different thicknesses is set). The curtain height is matched and adjusted by the PLD control system to achieve the best standard control of different production thicknesses, thereby achieving the purpose of further improving production efficiency, improving quality, and reducing operating costs.

[0013] 2. The device and method are reasonably designed to realize automatic adjustment and control of the tin bath outlet curtain, thereby achieving stable control of the tin bath outlet airflow, and can scientifically record the changes in the tin bath outlet and slag box airflow, further improving production efficiency, improving quality, and reducing operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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.

[0015] Figure 2 It is a front view of the lifting curtain in the embodiment of the present invention.

[0016] In the figure: 1. Storage cylinder; 2. Winding motor; 3. Mounting sleeve; 4. Encoder; 5. Hot wire anemometer; 6. Winding shaft; 7. Curtain; 8. Counterweight plate; 9. Telescopic rod; 10. Connecting frame; 11. Mounting seat; 12. Electric push rod; 13. Connecting plate. DETAILED DESCRIPTION

[0017] like Figure 1 and Figure 2 As shown, the present invention provides a device for finely controlling the airflow at the outlet of the tin bath of ultra-thin float glass, comprising lifting curtains equidistantly arranged along the conveying direction of the transition roller in the glass kiln, a hot-wire anemometer 5 is arranged between adjacent lifting curtains, a hot-wire anemometer 5 is arranged between the lifting curtain at the end and the tin bath outlet, the signal of the hot-wire anemometer 5 is connected to the PLD control system, and the PLD control system controls the height adjustment unit connected to the hot-wire anemometer 5.

[0018] Four lifting curtains are installed at the tin bath outlet, and a hot wire anemometer 5 is installed between adjacent lifting curtains. The airflow direction and pressure difference are controlled by adjusting the height of the lifting curtains, and the hot wire anemometer 5 is used to measure data, so as to further control the change direction of the airflow in the tin bath outlet and slag box area, thereby improving the quality and yield of the product.

[0019] like Figure 2 As shown. The lifting curtain includes a horizontally fixed storage cylinder 1, the bottom of which is provided with an opening, and a reel 6 for reeling in the curtain 7 is arranged in the storage cylinder 1 for horizontal rotation. The reel 6 is connected to an encoder 4, and the encoder 4 signal is connected to the PLD control system. The other end of the reel 6 is connected to the output shaft of the reel motor 2, and the PLD control system controls the reel motor 2. The encoder 4 detects the number of rotations of the reel 6. Due to the presence of the counterweight plate 8, the curtain 7 is in a taut state, and then the height of the lowered curtain 7 can be calculated, so that the bottom of the curtain 7 can reach the set height.

[0020] like Figure 2 As shown, in order to ensure that the rolled-up curtain 7 is in a taut state, a counterweight plate 8 is fixedly connected to the bottom end of the curtain 7, and a telescopic rod 9 is connected between the counterweight plate 8 and the storage tube 1. The counterweight plate 8 can make the curtain 7 in a vertical state in a natural state, but when the wind is strong, the curtain 7 still shakes, and if the weight of the counterweight plate 8 is too heavy, it will damage the structure of the curtain 7. Therefore, a telescopic rod 9 and a corresponding connecting frame 10 are installed on the outside of the curtain 7 to ensure that the curtain 7 does not shake.

[0021] like Figure 2 As shown, in order to improve the stability of the installation of the counterweight plate 8, the counterweight plate 8 is arranged along the width direction of the curtain 7, and the telescopic rods 9 are equidistantly distributed along the length direction of the counterweight plate 8.

[0022] like Figure 2 The bottom of the storage tube 1 is hinged with a connecting frame 10, the outer tube section of the telescopic rod 9 is fixedly connected to the connecting frame 10, and an electric push rod 12 is hinged between the connecting frame 10 and the storage tube 1. When the tin bath is partially inspected or other situations require that the curtain 7 be completely stored, the connecting frame 10 and the part of the curtain 7 that cannot be completely stored can be lifted by contracting the electric push rod 12.

[0023] like Figure 2As shown, in order to improve the overall structural strength of the connecting frame 10, the connecting frame 10 is an overall rectangular frame structure, a fork-shaped rod is provided inside the connecting frame 10, and a connecting plate 13 is fixedly connected through the rod, the connecting plate 13 is located in the middle of the connecting frame 10, the movable end of the electric push rod 12 is hinged on the connecting plate 13, the outer wall of the storage tube 1 is fixed with a mounting seat 11, and the tube end of the electric push rod 12 is hinged on the mounting seat 11.

[0024] like Figure 1 As shown, in order to realize wind speed measurement at multiple points on the side of the curtain 7, the hot air anemometers 5 are evenly distributed along the axial direction of the storage tube 1.

[0025] A control method for a refined airflow control device at an outlet of an ultra-thin float glass tin bath comprises the following steps: Step 1: The winding motor 2 drives the winding shaft 6 to rotate, and the winding shaft 6 unwinds the curtain 7. The curtain 6 moves vertically downward under the gravity of the counterweight plate 8, and drives the telescopic rod 9 to extend. The recorded number of turns is fed back to the PLD control system through the encoder 4. The PLD control system displays the lowering amount of the curtain 6. When the displayed lowering amount reaches the set lowering amount, the winding motor 2 is controlled to stop; Step 2: Record the yield and quality of the products produced, record the value of each hot-wire anemometer 5 separately, and record the value of the hot-wire anemometer 5 and the height of the curtain 7 corresponding to the highest yield; Step 3: After determining the type of product, according to the optimal height of the curtain 7 in the above step 2, the height of the curtain 7 is adjusted by the winding motor 2, and the height of the curtain 7 is measured by the encoder 4, so that the curtain 7 reaches the set height; Step 4. When storing the raised and lowered curtain, control the winding motor 2 to drive the winding shaft 6 to lift the curtain 7, stop the winding motor 2 after the counterweight plate 8 contacts the connecting frame 10, control the electric push rod 12 to retract, and the electric push rod 12 lifts the connecting frame 10 and the bottom end of the curtain 7, so that the connecting frame 10 drives the curtain 7 to rotate to a horizontal state. In subsequent use, control the electric push rod 12 to fully extend, and the connecting frame 10 is in a vertical state when it is fully extended.

Claims

1. A device for finely controlling the airflow at the outlet of an ultra-thin float glass tin bath, characterized in that: The invention comprises lifting curtains arranged at equal intervals along the conveying direction of the transition roller in the glass kiln, a hot wire anemometer (5) is arranged between adjacent lifting curtains, a hot wire anemometer (5) is arranged between the lifting curtain at the end and the tin bath outlet, the signal of the hot wire anemometer (5) is connected to the PLD control system, and the PLD control system controls the height adjustment unit connected to the hot wire anemometer (5).

2. The device for finely controlling the airflow at the outlet of the ultra-thin float glass tin bath according to claim 1, characterized in that: The lifting curtain comprises a horizontally fixed storage cylinder (1), the bottom of which is provided with an opening, a reel (6) for reeling in the curtain (7) being arranged in a horizontally rotatable manner in the storage cylinder (1), an encoder (4) being connected to the reel (6), a signal of the encoder (4) being connected to a PLD control system, the other end of the reel (6) being connected to an output shaft of a reeling motor (2), and the PLD control system controlling the reeling motor (2).

3. The device for finely controlling the airflow at the outlet of the ultra-thin float glass tin bath as claimed in claim 2, characterized in that: A counterweight plate (8) is fixedly connected to the bottom end of the curtain (7), and a telescopic rod (9) is connected between the counterweight plate (8) and the storage tube (1).

4. The device for finely controlling the airflow at the outlet of the ultra-thin float glass tin bath as claimed in claim 3, characterized in that: The counterweight plate (8) is arranged along the width direction of the curtain (7), and the telescopic rods (9) are distributed at equal distances along the length direction of the counterweight plate (8).

5. The device for finely controlling the airflow at the outlet of the ultra-thin float glass tin bath as claimed in claim 4, characterized in that: A connecting frame (10) is hingedly connected to the bottom of the storage cylinder (1), the outer cylinder section of the telescopic rod (9) is fixedly connected to the connecting frame (10), and an electric push rod (12) is hingedly connected between the connecting frame (10) and the storage cylinder (1).

6. The device for finely controlling the airflow at the outlet of the ultra-thin float glass tin bath as claimed in claim 5, characterized in that: The connecting frame (10) is in the form of a rectangular frame structure as a whole. A fork-shaped rod is provided inside the connecting frame (10) and is fixedly connected to a connecting plate (13) via the rod. The connecting plate (13) is located in the middle of the connecting frame (10). The movable end of the electric push rod (12) is hinged on the connecting plate (13). A mounting seat (11) is fixed on the outer wall of the storage cylinder (1), and the cylinder end of the electric push rod (12) is hinged on the mounting seat (11).

7. The device for finely controlling the airflow at the outlet of the ultra-thin float glass tin bath as claimed in claim 1, characterized in that: The hot air velocity meters (5) are distributed equidistantly along the axial direction of the storage cylinder (1).

8. The control method of the device for finely controlling the airflow at the outlet of the ultra-thin float glass tin bath as claimed in claim 1, characterized in that: The steps include: Step 1: The reeling shaft (6) is driven to rotate by the reeling motor (2), and the reeling shaft (6) unwinds the curtain (7). The curtain (6) moves vertically downward under the gravity of the counterweight plate (8), and drives the telescopic rod (9) to extend. The recorded number of turns is fed back to the PLD control system through the encoder (4). The PLD control system displays the amount of the curtain (6) being lowered, and controls the reeling motor (2) to stop when the displayed amount of lowering reaches the set amount of lowering; Step 2: Record the yield rate and quality of the produced products, record the value of each hot wire anemometer (5) separately, and record the value of the hot wire anemometer (5) and the height of the curtain (7) corresponding to the highest yield rate; Step 3, after determining the type of product, according to the optimal height of the curtain (7) in the above step 2, the height of the curtain (7) is adjusted by the winding motor (2), and the height of the curtain (7) is measured by the encoder (4) so ​​that the curtain (7) reaches the set height; Step 4: When the curtain is to be raised and lowered, the reeling motor (2) is controlled to drive the reeling shaft (6) to lift the curtain (7) until the counterweight plate (8) contacts the connecting frame (10), and then the reeling motor (2) is stopped. The electric push rod (12) is controlled to retract, and the electric push rod (12) lifts the connecting frame (10) and the bottom end of the curtain (7), so that the connecting frame (10) drives the curtain (7) to rotate to a horizontal state. When used subsequently, the electric push rod (12) is controlled to be fully extended, and when the connecting frame (10) is in a vertical state.

Images