CN110498598B

CN110498598B - Semi-tempered glass cooling system capable of improving productivity and semi-tempered glass production process

Info

Publication number: CN110498598B
Application number: CN201910773906.XA
Authority: CN
Inventors: 邹韶睿; 穆亮圣; 冯平
Original assignee: Luoyang North Glass Technology Co Ltd
Current assignee: Luoyang North Glass Technology Co Ltd
Priority date: 2019-08-21
Filing date: 2019-08-21
Publication date: 2022-04-12
Anticipated expiration: 2039-08-21
Also published as: CN110498598A

Abstract

The invention relates to the field of semi-tempered glass production equipment and technology, in particular to a semi-tempered glass cooling system capable of improving productivity and a semi-tempered glass production technology. The cooling system comprises a first fan and a second fan, the first fan is provided with a first motor used for driving an impeller in the first fan to rotate, the second fan is provided with a second motor used for driving an impeller in the second fan to rotate, air outlets of the first fan and the second fan are respectively connected to the same air collecting box through air paths, the air collecting box is connected with a cooling device used for cooling glass, a first flashboard used for controlling the opening and closing of the corresponding air path is arranged in the air path where the first fan is connected with the air collecting box, and a second flashboard used for controlling the opening and closing of the corresponding air path is arranged in the air path where the second fan is connected with the air collecting box. The invention aims to provide a semi-tempered glass cooling system capable of improving the productivity and a semi-tempered glass production process, so that the semi-tempered glass productivity is greatly improved.

Description

Semi-tempered glass cooling system capable of improving productivity and semi-tempered glass production process

Technical Field

The invention relates to the field of semi-tempered glass production equipment and technology, in particular to a semi-tempered glass cooling system capable of improving productivity and a semi-tempered glass production technology.

Background

The semi-toughened glass, also called thermal reinforced glass, is a kind between ordinary glass and toughened glass, and has the advantages of toughened glass, such as higher strength than ordinary float glass, more than twice as high strength as ordinary float glass, and avoids the disadvantages of poor flatness, easy spontaneous explosion, and integral crushing once damaged. When the semi-toughened glass is damaged, the semi-toughened glass radially cracks along a crack source, and generally has no tangential crack propagation, so that the semi-toughened glass still can keep no slump under the condition of normal damage thickness. Based on the advantages, the semi-toughened glass is particularly suitable for curtain walls and external windows in buildings, can be made into toughened coated glass, and has better image distortion than toughened glass.

In the production and preparation, the semi-tempered glass is annealed glass, and the surface travel is lower than the pressure of 69MPa through high temperature and quenching, so that the mechanical strength of the glass is increased by multiple times. According to the glass tempering process, the heated glass must be uniformly cooled as fast as possible at an optimal cooling rate, so that a temperature gradient is established between the surface of the glass and the inner layer, and stress is formed on the surface of the glass. At present, a cooling system in a toughening unit is mainly realized by forced convection of air by using a centrifugal fan.

The impeller of the centrifugal fan rotates to overcome air resistance, and the centrifugal fan runs from zero to high speed, needs a certain time in the acceleration process, influences the stability of the fan too fast in acceleration, and is slowly lifted to help to prolong the service life of the fan. Centrifugal fan adopts the motor to drive more, and motor speed is controlled by the converter, and the rotational speed improves and converter frequency increases promptly, and the internal voltage of converter can be drawn down too fast to the rising frequency, leads to overcurrent damage. In view of the above characteristics, taking a 315Kw fan as an example, when the speed is increased from 0Hz to 50Hz, the time for increasing the speed by 1Hz is generally limited to 2-3 s, so that about 120s is required for increasing the speed from low frequency to high frequency. Three centrifugal fan motor frequencies are generally adopted in the semi-tempered glass processing process, and are respectively as follows: low frequency: 5-10Hz and standby frequency; intermediate frequency: 25-30 Hz, and half-tempering frequency; high frequency: 50 to 60Hz, and a rapid cooling frequency.

At present, according to the adopted semi-toughened glass processing technology, the operation mode of a centrifugal fan motor in a cooling system is as follows: the two centrifugal fan motors operate at low frequency to wait for the glass to be heated to the temperable temperature, the two centrifugal fan motors are simultaneously lifted to the intermediate frequency before the tempered glass is about to be discharged from the furnace, and the glass is discharged from the furnace at the intermediate frequency for semi-tempering. After the semi-tempering is finished, in order to increase the production efficiency of the tempering unit, the cooling speed of the glass is increased, the two centrifugal fan motors are simultaneously lifted to high frequency to perform air-blowing cooling on the semi-tempered glass, and after the air-blowing cooling is finished, the two centrifugal fan motors simultaneously reduce the frequency to the low frequency to wait for the next furnace of glass.

As shown in FIG. 3, the original glass sheet is fed by a sheet feeding device 1 and then transferred to a heating furnace 2 for heating treatment. During the heating of the heating furnace 2 to the temperable temperature, the first motor 5 in the first fan 7 and the second motor 12 in the second fan 10 are simultaneously started up and frequency-up to the low-frequency interval for standby operation (interval from A0 to B0). Before the glass is heated to the temperable temperature, the first motor 5 and the second motor 12 are simultaneously raised to the intermediate frequency (B0-C0 interval). After the first motor 5 and the second motor 12 work stably for a certain time at the intermediate frequency (between the intervals of C0 and D0), the original glass sheet heated to the toughening temperature is transferred from the heating furnace 2 to the cooling device 3 for semi-toughening treatment (between the intervals of D0 and E0). The glass is left in the cooling device 3 after the semi-toughening treatment is finished, the first motor 5 and the second motor 12 are simultaneously lifted to high frequency (between E0 and F0), and the semi-toughened glass is continuously cooled by blowing (between F0 and G0). After the semi-tempered glass is cooled to a certain temperature by blowing air, the first motor 5 and the second motor 12 simultaneously reduce the frequency to a low-frequency standby state (between G0 and H0), and the semi-tempered glass is conveyed to the piece 4 (a piece discharging device) from the cooling device 3, so that the semi-tempering of the original piece of glass is completed.

In the production process of the semi-toughening process, the frequency rise of the centrifugal fan motor occupies a large amount of time, and the capacity of the glass toughening machine set is seriously influenced. With the increasing demand of semi-toughened products, the problem of improving the capacity of a glass toughening unit becomes an important subject for people.

Disclosure of Invention

The invention aims to provide a semi-tempered glass cooling system capable of improving the productivity and a semi-tempered glass production process, which can greatly improve the semi-tempered productivity of glass.

In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides a can improve half toughened glass cooling system of productivity, including first fan and second fan, first fan has the impeller pivoted first motor that is arranged in driving first fan, the second fan has the impeller pivoted second motor that is arranged in driving the second fan, the air outlet of first fan and second fan is connected on same album of wind box through the wind path respectively, album of wind box links to each other with the cooling device who is used for cooling glass, the rollgang has in the cooling device, the both ends of rollgang link to each other with heating furnace and lower piece device respectively, be equipped with the first flashboard that is used for controlling corresponding wind path logical closeness in the wind path that first fan and album of wind box are connected, be equipped with the second flashboard that is used for controlling corresponding wind path logical closeness in the wind path that second fan and album of wind box are connected.

A semi-toughened glass production process capable of improving productivity comprises the following steps:

1) feeding the glass sheet into a heating furnace through a sheet feeding device for heating, starting a first motor and a second motor in the heating process, and raising the frequency to a low-frequency region for standby operation;

2) keeping the first flashboard open and the second flashboard closed before the glass sheet is heated to the temperable temperature in the heating furnace, raising the frequency of the first motor to a high-frequency region, and then conveying the glass sheet heated to the temperable temperature to a cooling device from the heating furnace for semi-tempering treatment;

3) raising the frequency of a second motor to a high-frequency interval before the semi-tempering treatment in the step 2) is finished, opening a second gate plate after the semi-tempering treatment in the step 2) is finished, and cooling the semi-tempered glass sheet under the condition that the first motor and the second motor are both in the high-frequency interval;

4) and 3) cooling the glass original sheet in the step 3), reducing the frequency of the first motor and the second motor to a low-frequency range for standby, and moving out the cooled glass original skin through a sheet discharging device to obtain the semi-tempered glass.

Preferably, in the step 2), after the first motor is frequency-increased and stabilized in the high-frequency range, the glass sheet heated to the temperable temperature is conveyed to the cooling device from the heating furnace for semi-tempering treatment.

Preferably, in step 3), after the second motor is increased in frequency and stabilized in the high-frequency range, the second shutter is opened.

Preferably, the low frequency range of the first motor and the second motor is 5-10Hz, the high frequency range is 50-60 Hz, and the frequency increasing speed is 1Hz for every 2-3 seconds.

Preferably, the first gate and the second gate are both of a plug board type which can realize the quick control of the ventilation path.

Advantageous effects

The invention utilizes the principle that the wind pressure generated by the high-frequency work of two centrifugal fan motors is basically close to that generated by the high-frequency work of one centrifugal fan motor when the two centrifugal fan motors work at the intermediate frequency. One of the two centrifugal fan motors works at high frequency in a cooling system of the glass tempering machine set, and the wind pressure generated by the simultaneous medium-frequency work of the two centrifugal fan motors is close to the wind pressure generated by the simultaneous medium-frequency work of the two centrifugal fan motors, so that the process requirement of glass semi-tempering is met. During the period, the motors of the two centrifugal fans are directly raised to high frequency from low frequency, the independent control flashboards are added at the air outlet positions of the fans, the flashboards at the outlets of one centrifugal fan are controlled to be opened during semi-toughening, the flashboards at the outlets of the other centrifugal fan are controlled to be closed, and the operation is participated in by one centrifugal fan equivalently. Before the semi-tempering is completed, the motor of the centrifugal fan for closing the flashboard is boosted to a high-frequency range, the flashboard at the outlet of the closed centrifugal fan is rapidly opened after the semi-tempering is completed, the two centrifugal fan motors work at a high frequency at the same time, the cooling device can rapidly perform air blowing and cooling on the semi-tempered glass, the process reduces the boosting process from the medium frequency to the high frequency, the time is saved, and the production efficiency of the semi-tempered glass is improved.

Drawings

FIG. 1 is a schematic view showing the structural connection of a semi-tempered glass cooling system capable of improving productivity and upstream and downstream equipment of the cooling system in the semi-tempered glass production process;

FIG. 2 is a schematic diagram of a frequency-up-down route of a motor of the semi-toughened glass production process capable of improving productivity;

fig. 3 is a schematic diagram of a motor frequency-up-down route of a semi-tempered glass production process in the prior art.

The labels in the figure are: 1. the device comprises a sheet feeding device, a heating furnace, a cooling device, a sheet discharging device, a sheet feeding device, a sheet discharging device, a sheet feeding device, a sheet discharging device, a sheet feeding device, a sheet discharging device, a first motor, a first flashboard, a first fan, a second fan, 8, an air path, 9, an air collecting box, 10, a second fan, 11, a second fan, a second flashboard, 12 and a second motor.

Detailed Description

As shown in fig. 1, the semi-tempered glass cooling system capable of improving productivity of the present invention is the same as the cooling system for producing semi-tempered glass in the prior art, and both includes a first fan 7 and a second fan 10, wherein the power of the first motor 5 and the power of the second motor 12 are both 315Kw, the low frequency range is 5 to 10Hz, the high frequency range is 50 to 60Hz, and the frequency increasing speed is 1Hz per 2 to 3 seconds. The first fan 7 has a first motor 5 for driving rotation of an impeller in the first fan 7, and the second fan 10 has a second motor 12 for driving rotation of an impeller in the second fan 10. The air outlets of the first fan 7 and the second fan 10 are respectively connected to the same air collecting box 9 through an air path 8, the air collecting box 9 is connected with a cooling device 3 for cooling glass, a conveying roller way is arranged in the cooling device 3, and two ends of the conveying roller way are respectively connected with the heating furnace 2 and the lower piece device 4. Wind generated by the first fan 7 and the second fan 10 is converged and transmitted into the wind collecting box 9 through the wind channel 8, is stored in the wind collecting box 9 and is transmitted to the cooling device 3, then the cooling device 3 carries out toughening and cooling treatment on glass,

unlike the cooling system of the related art, in the present invention, the first shutter 6 for controlling opening/closing of the corresponding air passage 8 is provided in the air passage 8 connecting the first fan 7 and the wind collection box 9, and the second shutter 11 for controlling opening/closing of the corresponding air passage 8 is provided in the air passage 8 connecting the second fan 10 and the wind collection box 9. The first shutter 6 and the second shutter 11 are both of a draw-in type, so that the opening and closing of the air path 8 between the first fan 7 and the second fan 10 and the air collecting box 9 can be controlled quickly.

Referring to fig. 1 and 2, the process for producing semi-tempered glass capable of improving productivity according to the present invention comprises the following steps:

1) the glass sheet is sent into a heating furnace 2 for heating through a sheet loading device 1, and a first motor 5 and a second motor 12 are started and are boosted to a low-frequency interval for standby operation (an interval from A1 to B1 and an interval from A1 to B2) in the heating process;

2) the glass sheet is heated in the heating furnace 2 to the temperable temperature, the first gate plate 6 is kept open, the second gate plate 11 is closed, the first motor 5 is subjected to frequency raising to a high-frequency interval (B1-C1 interval) and after the first motor 5 is stabilized for a certain time (C1-D1 interval) in the high-frequency interval, the glass sheet which is just heated to the temperable temperature is conveyed to the cooling device 3 from the heating furnace 2 for semi-tempering treatment (D1-D2 interval);

3) the second shutter 11 is always kept in the closed state during the semi-tempering process in step 2). Before the semi-tempering treatment is finished, the second motor 12 is increased to a high-frequency range (B2-C2 range), after a period of time for stabilization (C2-D2 range), the second gate plate 11 is rapidly opened at the position D2, and the semi-tempered glass is cooled in a state that the first motor 5 and the second motor 12 are both in the high-frequency range (D2-E1 range);

4) and after the glass original sheet in the step 3) is cooled, the first motor 5 and the second motor 12 are subjected to frequency reduction to a low-frequency range (E1-F1) for standby, and the cooled glass original sheet is moved out through a sheet discharging device 4, so that the semi-tempered glass is prepared.

As can be seen from the comparison between FIG. 2 and FIG. 3, in the production process of the present invention, the glass can be directly cooled by two fans after the semi-tempering. In the prior art, a necessary motor frequency increasing process is needed between semi-toughening and rapid cooling. Therefore, the invention reduces the frequency increasing process from the medium frequency to the high frequency, saves the time and improves the production efficiency of the semi-toughened glass.

Claims

1. The utility model provides a can improve half toughened glass production technology of productivity, the half toughened glass cooling system that this technology adopted includes first fan (7) and second fan (10), first fan (7) have and are arranged in driving impeller pivoted first motor (5) in first fan (7), second fan (10) have and are arranged in driving impeller pivoted second motor (12) in second fan (10), the air outlet of first fan (7) and second fan (10) is connected respectively on same album of wind box (9) through wind path (8), album of wind box (9) links to each other with cooling device (3) that are used for cooling glass, conveyer roll table has in cooling device (3), the both ends of conveyer roll table link to each other with heating furnace (2) and lower device (4) respectively, its characterized in that: a first flashboard (6) for controlling the opening and closing of the corresponding air path (8) is arranged in the air path (8) connecting the first fan (7) and the air collecting box (9), and a second flashboard (11) for controlling the opening and closing of the corresponding air path (8) is arranged in the air path (8) connecting the second fan (10) and the air collecting box (9); the method is characterized in that: the process comprises the following steps:

1) sending the glass sheet into a heating furnace (2) for heating through a sheet feeding device (1), starting a first motor (5) and a second motor (12) in the heating process, and raising the frequency to a low-frequency region for standby operation;

2) the glass sheet is heated in the heating furnace (2) to the temperable temperature, the first flashboard (6) is kept open, the second flashboard (11) is closed, and the glass sheet heated to the temperable temperature is conveyed to the cooling device (3) from the heating furnace (2) for semi-tempering treatment after the first motor (5) is increased to the high-frequency region;

3) raising the frequency of a second motor (12) to a high-frequency interval before the semi-tempering treatment in the step 2) is finished, opening a second gate plate (11) after the semi-tempering treatment in the step 2) is finished, and cooling the semi-tempered glass sheet under the condition that the first motor (5) and the second motor (12) are both in the high-frequency interval;

4) and after the glass sheet in the step 3) is cooled, the first motor (5) and the second motor (12) are subjected to frequency reduction to a low-frequency range for standby, and the cooled glass sheet is moved out through a sheet discharging device (4) to obtain the semi-tempered glass.

2. The process according to claim 1, wherein the step of manufacturing the semi-tempered glass comprises: in the step 2), after the first motor (5) raises the frequency and stabilizes in a high-frequency interval, the glass sheet heated to the toughening temperature is conveyed to the cooling device (3) from the heating furnace (2) for semi-toughening treatment.

3. The process according to claim 1, wherein the step of manufacturing the semi-tempered glass comprises: and in the step 3), after the second motor (12) rises and stabilizes in a high-frequency interval, the second gate plate (11) is opened.

4. The process according to claim 1, wherein the step of manufacturing the semi-tempered glass comprises: the low-frequency interval of the first motor (5) and the second motor (12) is 5-10Hz, the high-frequency interval is 50-60 Hz, and the frequency increasing speed is 1Hz when every 2-3 seconds.

5. The process according to claim 1, wherein the step of manufacturing the semi-tempered glass comprises: the first flashboard (6) and the second flashboard (11) are both of a plugboard type which can realize the quick control of the opening and closing of the air passage (8).