A radiation retaining wall for improving the surface quality of float glass and its operation method

Abstract

The present invention relates to the field of float glass forming, and discloses a radiation retaining wall for improving the surface quality of float glass and an operation method thereof. The present invention is specifically a radiation retaining wall for improving the surface quality of float glass, comprising a tin bath, one side of which is fixedly connected to a tin bath contraction section, and windows are symmetrically arranged on the side walls of the tin bath, and a water bag trolley is arranged on one side of the edge of each window, and at least one water bag trolley is provided with a motor, and the motor output end is connected to a motor gear, and the motor gear is equipped with a chain, and the motor gear is connected to a rotating mechanism through a chain rotation, and the rotating mechanism is fixedly connected to one end of a supporting round steel, and the supporting round steel is welded and fixedly connected to the bottom wall of a supporting square water bag, and a corrugated plate curtain is fixedly connected to one side of the square water bag, and a water outlet is arranged on one side of the side wall of the square water bag, and a water inlet is arranged on the other side wall of the square water bag. The present invention solves the problem of spot defects in impurity float glass; and solves the problem of tin recovery of impurity vapor.

Description

Technical Field

[0001] The invention relates to the field of float glass forming, and in particular to a radiation retaining wall for improving the surface quality of float glass and an operating method thereof. Background Art

[0002] The tin defect on the surface of float glass has always been a difficult problem that troubles the quality of float glass, because float glass is formed with molten tin liquid as the floating medium. The tin liquid in the tin bath is polluted by oxygen entering from the outside, oxygen in the glass body (in the form of Na2O), sulfur in the tin liquid and other volatiles, forming stannous oxide and stannous sulfide, which are very easy to volatilize at high temperature, forming steam that diffuses to the medium temperature zone of the tin bath along with the plate strip. As the temperature in the tin bath drops and the contraction section narrows, it condenses and gradually gathers. When it gathers to a certain extent, it is impacted or vibrated by airflow, and the condensed stannous oxide or stannous sulfide will form drops, which fall on the glass surface that is not completely hardened to form spot defects. The present invention designs a method for improving the surface quality of float glass, which reduces the surface defects caused by stannous oxide and stannous sulfide condensing into solids due to the drop in temperature and falling on the glass surface by changing the direction of airflow. Summary of the invention

[0003] The invention aims to solve the problem of spot defects in float glass caused by condensed impurities stannous oxide or stannous sulfide, and to solve the problem of tin recovery from stannous oxide or stannous sulfide impurity vapor.

[0004] In order to solve the above problems, the present application is implemented through the following technical solutions: A radiation barrier for improving the surface quality of float glass comprises a tin bath, one side of which is fixedly connected to a tin bath contraction section. Windows are symmetrically arranged on the side walls of the tin bath, and a water bag trolley is arranged on one side of the edge of each window. At least one water bag trolley is provided with a motor, and the motor output end is connected to the motor gear, and the motor gear is equipped with a chain. The motor gear is connected to the rotating mechanism through the chain rotation, and the rotating mechanism is fixedly connected to one end of the supporting round steel, and the supporting round steel is welded and fixedly connected to the bottom wall of the supporting square water bag, and a corrugated plate curtain is fixedly connected to one side of the square water bag. A water outlet is arranged on one side of the side wall of the square water bag, and a water inlet is arranged on the other side of the side wall of the square water bag.

[0005] The other end of the supporting round steel is rotatably connected to the water bag trolley.

[0006] The supporting round steel penetrates through the wall hole of the fixed block fixedly connected to the top of the water bag trolley.

[0007] The square water bag is a hollow structure, filled with water, with a water inlet connected to a water inlet pipe and a water outlet connected to a water outlet pipe.

[0008] The corrugated plate curtain is made of high temperature resistant stainless steel and is composed of a plurality of corrugated groove plates.

[0009] A baffle is arranged inside the square water bag, and a water hole is arranged on a side away from the water inlet on a side wall at one end of the baffle.

[0010] The method for operating the radiation barrier wall for improving the surface quality of float glass comprises the following steps: S1. Adjust the height of the corrugated plate curtain and the tin liquid level inside the tin tank; S2. Adjust the angle between the corrugated plate curtain and the bottom side wall of the tin bath; S3. Adjust the height between the top of the corrugated plate curtain and the top inner wall of the tin bath.

[0011] In step S1, the height of the corrugated plate curtain from the tin liquid level inside the tin bath is 20-30 mm.

[0012] In step S2, the angle between the corrugated plate curtain and the bottom side wall of the tin bath is 0° to 15°.

[0013] In step S3, the height distance between the top of the corrugated plate curtain and the top inner wall of the tin bath is 0-20 mm.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The curtain and square water bag made of heat-resistant steel are used as the high-temperature heat radiation and airflow blocking wall of the entire tin bath. Circulating water is passed into the square water bag for cooling, ensuring stable and safe use in high temperature environment.

[0015] 2. The radiation retaining wall of this device is easy to disassemble, avoiding worries about water outage and tin bath being full and unable to be pulled out.

[0016] 3. Physically blocking the airflow can reduce the generation of condensed stannous oxide or stannous sulfide, improve the surface quality, and thus increase the glass yield.

[0017] 4. After installing the radiation retaining wall, the cycle of purging the tin bath is extended, which saves production time and production costs, increases production efficiency, and recovers tin at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the radiation retaining wall for improving the surface quality of float glass according to the present invention.

[0019] Figure 2 It is a schematic diagram of the connection structure of the corrugated plate curtain 2, the water bag trolley 3 and the square water bag 4 of the present invention.

[0020] Figure 3 It is a schematic structural diagram of the corrugated plate curtain 2 and the square water bag 4 of the present invention.

[0021] Figure numerals: tin bath 1, corrugated plate curtain 2, water bag trolley 3, square water bag 4, rotating mechanism 5, water outlet 6, water inlet 7, motor gear 8, supporting round steel 9, tin bath contraction section 10. DETAILED DESCRIPTION

[0022] The motor in the present invention is powered by an external power supply, and other components in the device can be purchased from the market. The sulfur content in each kilogram of tin liquid is 5ppm, and the oxygen content is 8ppm.

[0023] Example 1 The invention discloses a radiation retaining wall for improving the surface quality of float glass and an operation method thereof.

[0024] The invention relates to a device for changing the airflow inside a tin bath, comprising a tin bath 1, a corrugated plate curtain 2, a water bag trolley 3, a square water bag 4, a rotating mechanism 5, a water outlet 6, a water inlet 7, a motor gear 8, a supporting round steel 9, and a tin bath contraction section 10.

[0025] The present invention changes the airflow inside the tin bath, and the device is arranged in front of the shrinking section 10 of the float glass tin bath, and includes a square water bag 4, one side of which is provided with a cooling water inlet 7 and a water outlet 6, and a corrugated plate curtain 2 is connected to one side of the square water bag 4. The width of the corrugated plate curtain 2 and the square water bag 4 is less than the height of the internal space of the tin bath.

[0026] The two ends of the square water bag 4 are provided with supporting round steel 9, and a rotating mechanism 5 is provided on one side of the rotating shaft of the supporting round steel 9. The square water bag 4 is installed on the water bag trolley 3. The water bag trolley 3 is divided into two units, one of which is provided with a motor for providing rotating power. The motor gear 8 and the transmission mechanism are connected by a chain. The angle of the square water bag 4 and the corrugated plate curtain 2 is adjusted by adjusting the direction of the rotating motor. The other end of the rotating shaft of the supporting round steel 9 is installed on the water bag trolley 3.

[0027] Preferably, the corrugated plate curtain 2 is made of high temperature resistant stainless steel to prevent it from being corroded at high temperature in the tin bath to cause surface defects and contaminate the tin liquid.

[0028] The square water bag 4 and the corrugated plate curtain 2 are arranged inside the tin bath, and the radiation retaining wall installation method is as follows: refer to Figure 1 and Figure 2, push a water bag trolley 3 to the left window at the edge of the tin bath 1, and at the right window at the edge of the tin bath 1, place the corrugated plate curtain 2 welded on the square water bag 4 flat on the water bag trolley 3 on the right, connect the water inlet pipe 7 and the water outlet pipe 6, fix the rotating mechanism 5 and the supporting round steel 9, and another water bag trolley 3 is equipped with a motor, which is also placed on the right side of the edge of the tin bath 1. One end of the supporting round steel 9 fixed to the right water bag trolley 3 is gradually pushed toward the left window of the tin bath 1 together with the water bag trolley 3. After the corrugated plate curtain 2 is out of the edge of the tin bath 1 of the left window, fix the rotating mechanism 5 of the left water bag trolley 3 and the other end of the supporting round steel 9, turn on the motor 8, and gradually erect the corrugated plate curtain 2 from the horizontal to the required angle, and then turn off the motor 8. By adjusting the height of the water bag trolleys 3 on both sides, the required height of the corrugated plate curtain 2 is reached, and it is ensured that the two ends of the corrugated plate curtain 2 are in the horizontal.

[0029] The corrugated plate curtain 2 is composed of a plurality of corrugated groove plates, which are less likely to deform than ordinary steel plates. If deformed, the internal airflow will form vortices, affecting the airflow direction. A baffle is provided inside the square water bag 4, which is used to separate the water inlet 7 and the water outlet 6. A water hole is provided on the side wall at one end of the baffle, and the water hole is provided on the side away from the water inlet 7. The water injected from the water inlet 7 flows through the baffle from one side wall of the square water bag 4 into the water hole of the baffle on the other side wall of the square water bag 4 and then discharged through the water outlet 6, thereby maximizing the water circulation heat exchange path and area.

[0030] The bottom surface of the tin bath 1 is a vertical surface. The material is high-temperature liquefied glass. After the material is transported out of the furnace, it is sent into the tin bath 1 to spread and cool, and then flows into the tin bath contraction section 10. The falling objects generated during this period are condensed stannous oxide or stannous sulfide impurities.

[0031] The air flow velocity inside the tin bath 1 is 0.110739 m / s. The operation method of the radiation retaining wall is debugged online. The average experimental results after tracking for 8 hours at different heights and inclination angles are as follows: a. When the height of the corrugated plate curtain 2 from the tin liquid level is 10 mm and the angle between it and the bottom of the tin bath 1 is 30°, the number of dropped objects is 90 per hour.

[0032] b. When the height of the corrugated plate curtain 2 from the tin liquid level is 10 mm and the angle between it and the bottom of the tin bath 1 is 0°, the number of dropped objects is 77 per hour.

[0033] c. When the height of the corrugated plate curtain 2 from the tin liquid level is 30 mm and the angle between it and the bottom of the tin bath 1 is 30°, the number of dropped objects is 46 per hour.

[0034] d. When the height of the corrugated plate curtain 2 from the tin liquid level is 30 mm and the angle between it and the bottom of the tin bath 1 is 0°, the number of dropped objects is 12 per hour.

[0035] e. When the height of the corrugated plate curtain 2 from the tin liquid level is 20 mm and the angle between it and the bottom of the tin bath 1 is 15°, the number of dropped objects is 55 per hour.

[0036] f. When the height of the corrugated plate curtain 2 from the tin liquid level is 20 mm and the angle between it and the bottom of the tin bath 1 is 0°, the number of dropped objects is 30 per hour.

[0037] g. Blank control: The air flow velocity inside the tin bath 1 is 0.110739 m / s, and other conditions are the same as those in Example 1. When there is no baffle, the number of dropped objects is 350 pieces / hour.

[0038] The above test results show that the best effect is achieved when the height of the corrugated plate curtain 2 is 30 mm and the angle between the corrugated plate curtain 2 and the bottom of the tin bath 1 is 0°.

[0039] After debugging, the height of the corrugated plate curtain 2 from the tin liquid level is 20~30mm, the angle between the corrugated plate curtain 2 and the bottom of the tin bath 1 is 0°~15°, and when the corrugated plate curtain 2 is erected, the vertical height distance between the top of the side wall of the corrugated plate curtain 2 and the top side wall of the tin bath 1 is 0~20mm.

[0040] When the top of the corrugated plate curtain 2 is at a height of 0 mm from the top inner side of the tin bath 1, a portion of steam will overflow from the windows on both sides of the tin bath 1, and the overflowed falling steam can be ignored.

[0041] The vertical distance between the corrugated plate curtain 2 and the liquefied glass surface of the tin bath 1 is too high, and the airflow blocking performance is reduced. When the angle between the corrugated plate curtain 2 and the bottom side wall of the tin bath 1 is too large; the distance between the top of the corrugated plate curtain 2 and the top of the tin bath 1 increases, and the impurity vapor flows overflow to the tin bath contraction section 10, and the airflow blocking performance is reduced. At the same time, the distance between the bottom of the square water bag 4 and the liquefied glass surface increases, and the airflow blocking performance is reduced, and the number of dropped objects is large. When the top of the corrugated plate curtain 2 is too far away from the top of the tin bath 1, the diversion blocking effect of the airflow will also deteriorate, and the number of dropped objects will also increase. After debugging, the impurity vapor is blocked by the corrugated plate curtain 2 and the square water bag 4 and returns to the furnace connected to the tin bath 1 for H2 reduction, which not only reduces the spot defects of the glass, but also allows the tin in the impurities to be recycled.

[0042] Example 2 See also Figure 1~Figure 3 A radiation barrier for improving the surface quality of float glass comprises a tin bath 1, one side of the tin bath 1 is fixedly connected to a tin bath contraction section 10, Windows are symmetrically arranged on the side walls of the tin bath 1. A water bag trolley 3 is arranged on one side of the edge of each window. At least one water bag trolley 3 is provided with a motor. The output end of the motor is connected to a motor gear 8. The motor gear 8 is equipped with a chain. The motor gear 8 is connected to a rotating mechanism 5 through the chain. The rotating mechanism 5 is fixedly connected to one end of a supporting round steel 9. The supporting round steel 9 is welded and fixedly connected to the bottom wall of a supporting square water bag 4. A corrugated plate curtain 2 is fixedly connected to one side of the square water bag 4. A water outlet 6 is provided on one side of the side wall of the square water bag 4 , and a water inlet 7 is provided on the other side of the side wall of the square water bag 4 .

[0043] The other end of the supporting round steel 9 is rotatably connected to the water bag trolley 3.

[0044] The supporting round steel 9 penetrates through the wall hole of the fixed block fixedly connected to the top of the water bag trolley 3.

[0045] The square water bag 4 is a hollow structure, filled with water, the water inlet 7 is connected to the water inlet pipe, and the water outlet 6 is connected to the water outlet pipe.

[0046] The corrugated plate curtain 2 is made of high temperature resistant stainless steel, and the corrugated plate curtain 2 is composed of a plurality of corrugated groove plates.

[0047] A baffle is provided inside the square water bag 4 , and a water hole is provided on the side wall at one end of the baffle. The water hole is arranged on the side away from the water inlet 7 .

[0048] The method for operating a radiation barrier for improving the surface quality of float glass comprises the following steps: S1. Adjust the height of the corrugated plate curtain and the tin liquid level inside the tin tank; S2. Adjust the angle between the corrugated plate curtain and the bottom side wall of the tin bath; S3. Adjust the height between the top of the corrugated plate curtain and the top inner wall of the tin bath.

[0049] In step S1, the height between the corrugated plate curtain and the tin liquid level inside the tin bath is 20-30 mm.

[0050] In step S2, the angle between the corrugated plate curtain and the bottom side wall of the tin bath is 0° to 15°.

[0051] In step S3, the height distance between the top of the corrugated plate curtain and the top inner wall of the tin bath is 0-20 mm.

[0052] Those skilled in the art may also speed up the glass rate through debugging, or adjust the size of the baffle, or adjust other parameters, and such equivalent replacements also fall within the protection scope of the present invention.

Claims

1. A radiation barrier for improving the surface quality of float glass, comprising a tin bath (1), characterized in that: One side of the tin bath (1) is fixedly connected to a tin bath contraction section (10). Windows are symmetrically arranged on the side walls of the tin bath (1), and a water bag trolley (3) is arranged on one side of the edge of each window. At least one water bag trolley (3) is provided with a motor, and the output end of the motor is connected to a motor gear (8), and the motor gear (8) is equipped with a chain. The motor gear (8) is rotatably connected to a rotating mechanism (5) through the chain, and the rotating mechanism (5) is fixedly connected to one end of a supporting round steel (9), and the supporting round steel (9) is welded and fixedly connected to the bottom wall of a supporting square water bag (4), and a corrugated plate curtain (2) is fixedly connected to one side of the square water bag (4). A water outlet (6) is provided on one side of the side wall of the square water bag (4), and a water inlet (7) is provided on the other side of the side wall of the square water bag (4).

2. The radiation barrier for improving the surface quality of float glass according to claim 1, characterized in that: The other end of the supporting round steel (9) is rotatably connected to the water bag trolley (3).

3. The radiation barrier for improving the surface quality of float glass according to claim 1, characterized in that: The supporting round steel (9) passes through a wall hole of a fixed block fixedly connected to the top of the water bag trolley (3).

4. The radiation barrier for improving the surface quality of float glass according to claim 1, characterized in that: The square water bag (4) is a hollow structure, filled with water, the water inlet (7) is connected to the water inlet pipe, and the water outlet (6) is connected to the water outlet pipe.

5. The radiation barrier for improving the surface quality of float glass according to claim 1, characterized in that: The corrugated plate curtain (2) is made of high-temperature resistant stainless steel, and the corrugated plate curtain (2) is composed of a plurality of corrugated groove plates.

6. The radiation barrier for improving the surface quality of float glass according to claim 1, characterized in that: The square water bag (4) is provided with a baffle plate inside, and a water hole is provided on a side wall at one end of the baffle plate, and the water hole is arranged on a side away from the water inlet (7).

7. The method for operating a radiation barrier for improving the surface quality of float glass according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Adjust the height of the corrugated plate curtain and the tin liquid level inside the tin tank; S2. Adjust the angle between the corrugated plate curtain and the bottom side wall of the tin bath; S3. Adjust the height between the top of the corrugated plate curtain and the top inner wall of the tin bath.

8. The method for operating a radiation barrier according to claim 7, characterized in that: In step S1, the height of the corrugated plate curtain from the tin liquid level inside the tin bath is 20-30 mm.

9. The method for operating a radiation barrier according to claim 7, characterized in that: In step S2, the angle between the corrugated plate curtain and the bottom side wall of the tin bath is 0° to 15°.

10. The method for operating a radiation barrier according to claim 7, characterized in that: In step S3, the height distance between the top of the corrugated plate curtain and the top inner wall of the tin bath is 0-20 mm.

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