CN212894437U

CN212894437U - Upper forced convection device for producing off-line LOW-E glass by toughening furnace

Info

Publication number: CN212894437U
Application number: CN202021373446.6U
Authority: CN
Inventors: 王小坤
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-13
Filing date: 2020-07-13
Publication date: 2021-04-06
Anticipated expiration: 2030-07-13

Abstract

The utility model provides a tempering furnace production off-line LOW-E glass's upper portion forced convection device belongs to glass processing technology field. The upper forced convection device for producing the off-line LOW-E glass by the toughening furnace is characterized by comprising a high-temperature fan, a forced convection box body and a convection air pipe, wherein the high-temperature fan is arranged at the top of the heating furnace and fixedly connected with a support arranged outside the heating furnace; the forced convection box body is connected with an air outlet of the high-temperature fan through a high-temperature resistant hose; the convection air pipe is connected with the forced convection box body, and is provided with a nozzle which is arranged on a heating furnace wire in the heating furnace. This application will produce the mode and the heating furnace separation of the high temperature fan of vibrations with independent support easily, all vibrations of the operation in-process of high temperature fan all absorb through support and high temperature resistant ventilation hose to avoid the heating furnace to produce vibrations, prevent the descending of dust particle, and the damage of stove silk, porcelain spare.

Description

Upper forced convection device for producing off-line LOW-E glass by toughening furnace

Technical Field

The utility model belongs to the technical field of the glass processing, concretely relates to tempering furnace production off-line LOW-E glass's upper portion forces convection current device.

Background

The process of tempering the glass comprises the following steps: when the toughened glass is produced, two important links are mainly provided, one is that the surface of the glass is uniformly heated, when the upper surface and the lower surface of the glass and the middle layer reach the required toughening temperature, the second link is entered, namely, the upper surface and the lower surface of the glass are simultaneously quenched, so that the upper surface and the lower surface of the glass and the middle layer of the glass form a temperature gradient in a short time, in the quenching and blowing process of the glass, the middle layer of the glass is cooled all the time and gradually reaches the temperature of the upper surface and the lower surface of the glass, and the middle layer of the glass is accompanied with the process of cold shrinkage in the cooling process, so that the middle layer generates tensile stress on two surfaces of the glass, and the tensile stress is greater than that of the two surfaces of the glass on the middle layer, thereby the purpose of toughening the glass is achieved in the heating and quenching.

The LOW-E glass is also called LOW-emissivity glass, and is a film system product formed by plating a plurality of layers of metal or other compounds on the surface of the glass. The film coating layer has the characteristics of high visible light transmission and high middle and far infrared ray reflection; in the process of toughening the glass, the film layer of the glass faces upwards, the lower surface of the glass is contacted with a quartz roller way in the heating furnace to perform reciprocating motion, and the heating process is as follows: the heat generated by the furnace wire heats the surface of the glass in the form of far infrared wavelength, but the middle and far infrared rays have the characteristic of high reflection, and the heat generated by the furnace wire cannot heat the coating layer on the upper surface of the glass, so that an upper forced convection device is arranged on the upper surface of the glass to heat the upper surface of the glass by high-temperature air with forced convection, so as to achieve the purpose that the upper surface of the glass can be heated.

At present, when off-line LOW-E glass is processed, an upper forced convection device is adopted:

set for the fan of corresponding quantity above the heating furnace, the fan passes through the air pipe that connects, the high-temperature gas through air pipe flows through and sets for the nozzle of a certain quantity in the heating furnace, with horizontal or longitudinal arrangement to glass upper surface department, through the adjustment to fan impeller speed, reach the jet-propelled speed of the nozzle on the control glass upper surface of being convenient for, thereby form different jet-propelled speed curves to the upper surface of glass, be convenient for heat the glass upper surface, also do benefit to the keeping of glass in the heating process and level simultaneously, guarantee glass's surface quality. However, the device has the disadvantages that a certain number of fans can generate corresponding vibration or resonance when rotating at different impeller speeds, and the fans are installed on the heating furnace body, so that the heating furnace vibrates therewith, furnace wires and porcelain pieces in the heating furnace have breaking probability due to vibration, and meanwhile, a large amount of dust particles fall on the upper surface of glass, so that the upper surface of the glass can generate fog and frosted flaws, the surface quality of the glass is damaged, and unqualified products are generated.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a convection device is forced on tempering furnace production off-line LOW-E glass's upper portion to solve the fan setting and produce vibrations on the heating furnace and lead to the dust particle to fall into the technical problem on glass surface.

In order to achieve the above object, the technical solution of the present invention is:

the upper forced convection device for producing the off-line LOW-E glass by the toughening furnace comprises a high-temperature fan, a forced convection box body and a convection air pipe, wherein the high-temperature fan is arranged at the top of the heating furnace and is fixedly connected with a bracket arranged outside the heating furnace; the forced convection box body is connected with an air outlet of the high-temperature fan through a high-temperature resistant hose; the convection air pipe is connected with the forced convection box body, and is provided with a nozzle which is arranged on a heating furnace wire in the heating furnace.

Preferably, each set of nozzles is arranged on a set of heating furnace wires, and the nozzles extend to be close to the quartz roller way through the intervals of the heating furnace wires of each set.

Preferably, the nozzles are arranged in the glass width direction.

Preferably, the nozzle is provided with a plurality of areas along the width direction of the glass, and the temperature of each area is adjusted by a heating furnace wire.

Preferably, the air inlet of the high-temperature fan is provided with a valve device, and the valve device is detachably connected with the high-temperature fan.

Preferably, the valve device includes valve body and transmission shaft, the transmission shaft is connected with the valve plate at valve body both ends, and the upper end of transmission shaft is equipped with the rolling bearing, is equipped with sprocket, chain on the rolling bearing, the cylinder is connected to the one end of chain, and other end connecting spring.

The utility model has the advantages that:

1. this application will produce the mode and the heating furnace separation of the high temperature fan of vibrations with independent support easily, all vibrations of the operation in-process of high temperature fan are all absorbed through the frame of oneself and high temperature resistant ventilation hose to avoid the heating furnace to produce vibrations, prevent the descending of dust particle, and the damage of stove silk, porcelain spare.

2. The nozzles of the upper forced convection air pipes are arranged on the independent heating furnace wires, and the temperature of the sprayed gas is the same as that of the corresponding furnace wires, so that the aim of controlling the temperature of the gas sprayed out by the nozzles by using the temperature of the furnace wires is fulfilled. Therefore, the nozzles with different temperatures can be distributed in the area in the width direction of the upper surface of the glass, the temperature adjustment curve of the glass is widened, and the surface quality of the glass is improved.

3. The nozzle extends to the position close to the quartz roller way through the interval of each group of heating furnace wires, the nozzle is very close to the upper surface of the glass, the blowing strength is increased, the heating time can be shortened, and the energy consumption is reduced.

4. The air inlet of the high-temperature fan is provided with the valve device, and the air inlet of the fan can be closed when the toughening furnace is in standby, so that the air injection heating of the nozzle on the quartz roller way is avoided, the problem that the lower surface of the glass is scalded and the quality of the lower surface of the glass is reduced due to the fact that the temperature of the quartz roller way is too high is avoided.

Drawings

Fig. 1 is a longitudinal sectional view of the present invention.

Fig. 2 is a transverse sectional view of the present invention.

Fig. 3 is a side view of the valve device.

Fig. 4 is a top view of the valve device.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

Referring to fig. 1 to 2, the upper forced convection device for producing off-line LOW-E glass by a toughening furnace comprises a high-temperature fan 1, a forced convection box body 2 and a convection air pipe 3, wherein the high-temperature fan 1 is arranged at the top of a heating furnace 4, and the high-temperature fan 1 is fixedly connected with a support 5 arranged outside the heating furnace 4; the forced convection box body 2 is connected with an air outlet 11 of the high-temperature fan 1 through a high-temperature resistant hose 6; the convection air duct 3 is connected with the forced convection box body 2, the convection air duct 3 is provided with a nozzle 31, and the nozzle 31 is arranged on a heating furnace wire 41 in the heating furnace 4.

The high-temperature fan is separated from the heating furnace inside the toughening furnace, the high-temperature fan is supported and fixed through a support outside the heating furnace, and the joint of the high-temperature fan and the heating furnace is sealed by heat-insulating cotton; and the air outlet of the high-temperature fan is connected with the forced convection box body through a hose. All vibration of the high-temperature fan in the operation process is absorbed by the support 5, the heat insulation cotton 9 and the hose 6, and the heating furnace of the toughening furnace cannot generate associated vibration due to any vibration generated in the working process, so that the falling of dust particles and the damage of furnace wires and porcelain pieces are avoided.

Further, each set of nozzles 31 is disposed on a set of heater wires 41, and the nozzles 31 extend through the space between the sets of heater wires to be close to the quartz roller table 7. Preferably, the nozzles 31 are arranged in the glass width direction. Preferably, the nozzle 31 is provided with a plurality of zones in the glass width direction, and the temperature of each zone is adjusted by heating furnace wires. Referring to fig. 1, the nozzle was provided with 9 zones in the glass width direction. Different zones may also be provided according to the width of the furnace.

The above-described nozzles are arranged in the direction of the glass width and are partitioned according to the glass width, and a plurality of nozzles may be provided for each of the partitions. Each group of nozzles is arranged on the corresponding heating wires, one group of furnace wires corresponds to one group of nozzles, and the number of the groups of nozzles of the heating wires is larger than that of the nozzles of the corresponding group of nozzles in the width direction of the glass, and the nozzles extend to the position close to the upper surface of the glass through the interval of each furnace wire, so that the blowing strength is increased, and the heating time is shortened. In the production process, the heating furnace silk is connected with the temperature controller, heats the glass surface through the temperature of adjustment heating furnace silk, and the nozzle can heat the glass upper surface along with the high-temperature gas of the corresponding temperature of temperature blowout of heater strip to realized can distributing out the nozzle of different temperatures on the region of glass upper surface width direction, widened glass's temperature adjustment curve, thereby improved glass's surface quality.

Referring to fig. 3 to 4, a valve device 8 is arranged at an air inlet of the high temperature fan, and the valve device 8 is detachably connected with the high temperature fan 1. Preferably, the valve device is connected with the high-temperature fan through a flange, so that the maintenance is convenient. The valve device 8 comprises a valve body 81 and a transmission shaft 82, the transmission shaft 82 is connected with valve plates 83 at two ends of the valve body 81, and high-temperature-resistant bearings 90 are arranged at the valve plates; the upper end of the transmission shaft 82 is provided with a belt seat bearing 84, the belt seat bearing is provided with a chain wheel 85 and a chain 86, one end of the chain is connected with a cylinder 87, and the other end of the chain is connected with a spring 88 and a fixed support 89.

In order to prevent the quartz roller way from being influenced by the heating of the nozzle when the toughening furnace is in standby, the jet heating of the nozzle to the quartz roller way is reduced, and a valve device is set at the air inlet of the high-temperature fan. When the toughening furnace is in standby, the air inlet of the fan is closed, so that the air injection heating of the nozzle on the quartz roller way is avoided. The valve device is characterized in that the cylinder is arranged outside the heating furnace, the chain is driven by the stretching of the cylinder, and the chain wheel rotates to enable the valve plate to rotate to realize the opening and closing actions. Because the transmission shaft has higher temperature, the setting of sprocket chain can avoid cylinder direct contact transmission shaft, can protect the cylinder, avoids the cylinder to receive high temperature to damage.

The utility model discloses a theory of operation:

when the LOW-E glass is produced, the glass enters the heating furnace through the upper sheet table roller way to be heated, the glass reciprocates in the heating period, after the glass enters the heating furnace, the front furnace door is closed, and high-temperature gas generated by the upper forced convection device is sprayed on the upper surface of the glass through a large number of nozzles, so that the purpose of synchronously heating the upper surface of the glass and the lower surface of the glass is achieved.

The heating furnace is characterized in that a plurality of groups of furnace wires are arranged in the width direction of the heating furnace, corresponding nozzle devices are arranged on each group of furnace wires, the temperature of the furnace wires on the glass is adjusted according to the size of the glass in the heating furnace, and the nozzle devices are placed on the furnace wires in corresponding temperature areas in an independent unit mode, so that the temperature of the sprayed high-temperature gas is the same as that of the corresponding furnace wires, and the purpose of controlling the temperature of the gas sprayed out from the nozzles by using the temperature of the furnace wires is achieved. The temperature curve effect is more obvious, thereby ensuring the surface quality and the yield of the glass.

After the glass is heated, the rear furnace door is opened, and the glass enters the quenching air grid through the quartz roller way to be toughened and quenched, so that the purpose of toughening the glass is achieved. After the glass is discharged and enters the quenching air grid, before the glass in the second furnace enters the furnace, the high-temperature fan enters the idle state at the moment, and meanwhile, the valve of the air inlet of the high-temperature fan is closed, so that the high-temperature gas of the high-temperature fan is prevented from carrying out extra heating on a quartz roller way in the furnace through the nozzle, and the lower surface of the glass is prevented from being scalded.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.

Claims

1. The upper forced convection device for producing the off-line LOW-E glass by the toughening furnace is characterized by comprising a high-temperature fan, a forced convection box body and a convection air pipe, wherein the high-temperature fan is arranged at the top of the heating furnace and fixedly connected with a support arranged outside the heating furnace; the forced convection box body is connected with an air outlet of the high-temperature fan through a high-temperature resistant hose; the convection air pipe is connected with the forced convection box body, and is provided with a nozzle which is arranged on a heating furnace wire in the heating furnace.

2. The upper forced convection apparatus for annealing furnace off-line LOW-E glass according to claim 1, wherein each set of nozzles is disposed on a set of heating wires, and the nozzles extend to near the quartz roller table through the space between each set of heating wires.

3. The upper forced convection apparatus for toughening furnace off-line LOW-E glass according to claim 1 or 2, wherein the nozzles are arranged in the glass width direction.

4. The upper forced convection apparatus for annealing furnace production off-line LOW-E glass according to claim 3, wherein the nozzle is provided with a plurality of zones in the glass width direction, and the temperature of each zone is adjusted by heating furnace wires.

5. The upper forced convection device for the offline LOW-E glass produced by the toughening furnace according to claim 1, wherein a valve device is arranged at an air inlet of the high-temperature fan, and the valve device is detachably connected with the high-temperature fan.

6. The upper forced convection device for the offline LOW-E glass produced by the toughening furnace as recited in claim 5, wherein the valve device comprises a valve body and a transmission shaft, the transmission shaft is connected with the valve plates at two ends of the valve body, the upper end of the transmission shaft is provided with a bearing with a seat, the bearing with the seat is provided with a sprocket and a chain, one end of the chain is connected with the cylinder, and the other end of the chain is connected with the spring.