CN112499938A

CN112499938A - Precise control system for gas material channel of glass product

Info

Publication number: CN112499938A
Application number: CN202011523947.2A
Authority: CN
Inventors: 徐伟刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2021-03-16

Abstract

The invention discloses a precise control system of a gas material channel of a glass product, which is provided with a material channel for conveying molten glass, wherein the material channel is sequentially divided into a rear cooling section, a front cooling section, a homogenizing section and a material basin section along the conveying direction of the molten glass, the homogenizing section is divided into a left homogenizing section and a right homogenizing section, heat supply mechanisms for independently supplying heat are respectively arranged on the rear cooling section, the front cooling section, the left homogenizing section, the right homogenizing section and the material basin section, and cooling mechanisms cooperating with the heat supply mechanisms arranged on the rear cooling section and the front cooling section are respectively arranged on the rear cooling section and the front cooling section; the invention effectively solves the defects of large temperature deviation and low uniformity of the glass liquid cross section at the inlet of the feed basin of the fuel gas channel.

Description

Precise control system for gas material channel of glass product

Technical Field

The invention relates to the technical field of glass product preparation, in particular to a precise control system for a gas material channel of a glass product.

Background

The channel is a channel made of refractory material, the molten glass flows to the forming machine from the kiln through the channel, the molten glass flowing out of the kiln is controlled to be cooled, so that the temperature of the molten glass from the material basin is consistent from two sides to the middle part from top to bottom, but when the molten glass flows in the channel brick, the molten glass contacts the inner wall of the refractory brick, the temperature is necessarily reduced, the flow is also slowed down, the molten glass in the middle part flows fast, the temperature is higher than that of the two sides, so that the phenomena of backflow, vortex, material stagnation and the like are generated on the two sides of the channel, and the temperature difference in the horizontal direction is generated.

At present, global resources are less and less, and international and domestic glassware market is in the transition stage, constantly increases to glassware lightweight demand, and the lightweight has proposed higher more stable requirement to glass liquid temperature, consequently to the accurate control of the inside glass liquid of material way, and the requirement of the temperature homogeneity of glass liquid in the material basin is higher and higher. Although the gas heating mode is mostly adopted in the domestic material channel of putting eyes, the characteristic of the flowing process of the glass liquid in the material channel is not analyzed, the air in the upper space of the glass liquid is heated only by flame, the temperature value of the glass liquid in the left, middle, upper, middle and lower parts is not controlled, the temperature is extremely uneven when the glass liquid in the material channel enters the material basin, the stability of the glass liquid drops at the outlet of the material basin is poor, and particularly, when the glass liquid drops are multiple, the defects of the lengths, the shapes, the weights and the like of the material drops cause the defects of glass products produced by subsequent equipment, such as multiple defects, high qualified product rate and low qualified product rate.

Disclosure of Invention

In order to solve the technical problems, the invention provides a precise control system for a glass product fuel gas material channel, which effectively solves the defects of large temperature deviation and low uniformity of a molten glass cross section at an inlet of a fuel gas material channel material basin.

In order to achieve the technical purpose, the invention adopts the technical scheme that: the precise control system for the gas material channel of the glass product is provided with a material channel for conveying molten glass, the material channel is sequentially divided into a rear cooling section, a front cooling section, a homogenizing section and a material basin section along the conveying direction of the molten glass, the homogenizing section is divided into a left homogenizing section and a right homogenizing section, heat supply mechanisms for independently supplying heat are respectively installed on the rear cooling section, the front cooling section, the left homogenizing section, the right homogenizing section and the material basin section, and cooling mechanisms cooperating with the heat supply mechanisms installed on the rear cooling section and the front cooling section are respectively arranged on the rear cooling section and the front cooling section.

Optionally, the cooling mechanisms on the front cooling section and the rear cooling section have the same structure, and each cooling mechanism includes an upper cooling mechanism located above the pipe wall of the front cooling section/the rear cooling section and a lower cooling mechanism located below the pipe wall of the front cooling section/the rear cooling section.

Optionally, go up cooling mechanism and lower cooling mechanism structure the same, all include the cooling wind channel, connect the one end in cooling wind channel and to the cooling fan that the cooling wind channel carried cold wind and connect the cooling wind channel other end and with the tuyere of material way intercommunication.

Optionally, the heat supply mechanism is composed of a plurality of premixed independent spray guns, and supplies heat to the material channel through the spray guns.

Optionally, the system further comprises a gas supply mechanism for supplying gas to each heat supply mechanism.

Optionally, the gas supply mechanism comprises a gas channel for conveying gas and a compressed air channel for conveying compressed air, and the gas and the compressed air supply the gas and the compressed air to the heat supply mechanisms after adjusting the air-fuel ratio through the mixing pipeline.

Optionally, the mixing pipeline includes a main pipe, a first branch pipe communicated with the compressed air pipeline, and a second branch pipe communicated with the gas pipeline, the first branch pipe is provided with a manual ball valve, the second branch pipe is provided with a proportional regulating valve for regulating an air-fuel ratio, the main pipe is further provided with an electric actuator and a flow measurer, the electric actuator is installed at the bottom of the main pipe, the installation position of the flow measurer is located below the second branch pipe, and the top of the main pipe is provided with a gas mixer.

Optionally, the inner cavity inlet of the bowl section is evenly divided into a left upper region, a left middle region, a left lower region, a middle upper region, a central region, a middle lower region, a right upper region, a right middle region and a right lower region.

Optionally, the cooling device further comprises an electric control system, the electric control system comprises a central processing unit and a computer, thermocouples used for temperature acquisition are installed on the material basin section, the front cooling section and the rear cooling section, the thermocouples are respectively electrically connected with the central processing unit, and the thermocouples transmit detected temperature information to the central control unit and display the temperature information on the computer.

The invention has the following beneficial effects: according to the invention, the material channel is divided into a rear cooling section, a front cooling section, a left homogenizing section, a right homogenizing section and a material basin section through different heating and cooling modes, the invention carries out zone control according to the flowing characteristic of glass liquid, and can effectively ensure the temperature uniformity of the glass liquid in the flowing process of the material channel through controlling the temperature of different sections, thereby providing long-term stable glass liquid for subsequent processes, meeting the lightweight production process and improving the qualified rate of glass products.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a cooling mechanism;

FIG. 3 is a schematic view of a mixing duct according to the present invention;

FIG. 4 is a schematic view of the inlet structure of the bowl section of the present invention;

the labels in the figure are: 1. the device comprises a material channel, 2, a rear cooling section, 3, a front cooling section, 4, a homogenizing section, 5, a material basin section, 6, a left homogenizing section, 7, a right homogenizing section, 8, a heat supply mechanism, 9, a cooling mechanism, 12, a cooling air channel, 13, a cooling fan, 14, a tuyere, 15, a spray gun, 16, a gas channel, 17, a compressed air channel, 18, a mixing pipeline, 19, a header pipe, 20, a first branch pipe, 21, a second branch pipe, 22, a manual ball valve, 23, a proportion adjusting valve, 24, an electric actuator, 25, a flow measurer, 26, a gas mixer, 27 and a thermocouple.

Detailed Description

As shown in the figure, the precise control system for the gas channel of the glass product is provided with a channel 1 for conveying molten glass, the channel 1 is sequentially divided into a rear cooling section 2, a front cooling section 3, a homogenizing section 4 and a material basin section 5 along the conveying direction of the molten glass, the homogenizing section 4 is divided into a left homogenizing section 6 and a right homogenizing section 7, heat supply mechanisms 8 for independently supplying heat are respectively installed on the rear cooling section 2, the front cooling section 3, the left homogenizing section 6, the right homogenizing section 7 and the material basin section 5, and cooling mechanisms 9 cooperating with the heat supply mechanisms 8 installed on the rear cooling section 2 and the front cooling section 3 are further respectively arranged on the rear cooling section 2 and the front cooling section 3.

In some exemplary embodiments, the cooling mechanisms 9 on the front cooling section 3 and the rear cooling section 2 are identical in structure, and each include an upper cooling mechanism 10 located above the pipe wall of the front cooling section 3/the rear cooling section 2 and a lower cooling mechanism 11 located below the pipe wall of the front cooling section 3/the rear cooling section 2. Go up cooling mechanism 10 and fall cooling mechanism 11 structure the same, all include cooling wind channel 12, connect the one end in cooling wind channel 12 and to cooling fan 13 and the connection that the cooling wind channel carried cold wind are in the cooling wind channel 13 other end and with tuyere 14 of material way 1 intercommunication.

In some exemplary embodiments, the heat supply mechanism 8 is composed of a plurality of premixed independent lances 15, and supplies heat to the material passage 1 through the lances 15.

In some exemplary embodiments, an air supply means for supplying air to each heat supply means 8 is further included.

In some exemplary embodiments, the air supply means includes a gas passage 16 for supplying gas and a compressed air passage 17 for supplying compressed air, which supply the gas and the compressed air to the respective heat supply means 8 after adjusting the air-fuel ratio through a mixing duct 18.

In some exemplary embodiments, please refer to fig. 3, the mixing pipeline 18 includes a main pipe 19, a first branch pipe 20 communicating with the compressed air pipeline 17, and a second branch pipe 21 communicating with the gas channel 16, the first branch pipe 20 is provided with a manual ball valve 22, the second branch pipe 21 is provided with a proportional regulating valve 23 for adjusting the air-fuel ratio, the main pipe 19 is further provided with an electric actuator 24 and a flow measurer 25, the electric actuator 24 is installed at the bottom of the main pipe 19, the flow measurer 25 is installed below the second branch pipe 21, and the top of the main pipe 19 is provided with a gas mixer 26.

In some exemplary embodiments, referring to fig. 4, the inlet of the inner cavity of the bowl section 5 is evenly divided into nine zones. Comprises a left upper area, a left middle area, a left lower area, a middle upper area, a central area, a middle lower area, a right upper area, a right middle area and a right lower area.

In some exemplary embodiments, the heating device further comprises an electric control system, the electric control system comprises a central processing unit and a computer, thermocouples 27 for temperature acquisition are installed on the material basin section 5, the front cooling section 3 and the rear cooling section 2, the thermocouples 27 are respectively electrically connected with the central processing unit, the thermocouples 27 transmit detected temperature information to the central controller, the detected temperature information is displayed on the computer, when the temperature exceeds the upper temperature limit set by the central controller or is lower than the lower temperature limit set by the central controller, the temperature information is displayed on the computer, and the computer controls the corresponding heating mechanism or cooling mechanism to work.

The working principle of the invention is as follows: in the working process of the invention, heating mechanisms on a front cooling section, a rear cooling section, a left homogenizing section, a right homogenizing section and a material basin section are all connected with a five-section air and gas mixing pipeline, a pipeline at the lower part of a premixing type frame is connected with a compressed air pipeline with 7-10Kpa pressure and is connected with an electric actuator, and a pipeline at the rear part of the premixing type frame is connected with a natural gas pipeline with 5-10Kpa pressure and a flow type proportion adjusting valve. Each section adopts a single element for controlling the opening and closing of an electric actuator and controlling the flow rate of compressed air, and is matched with a flow type proportion regulator to prepare gas with a corresponding proportion (the proportion is called as an air-fuel ratio and can be regulated and locked) to form mixed gas, the gas with large flow rate is more, the gas with small flow rate is less, but the air-fuel ratio is unchanged, the efficient air-fuel ratio is a key factor for controlling temperature and is also a basis for improving combustion efficiency, and each section mixes air and gas through four parts of the electric actuator, the proportion regulating valve, the flow measurer and the gas mixer to obtain mixed gas with constant air-fuel ratio. The mixed gas in the gas mixer is conveyed to each spray gun in a heating area by the main pipe and is sprayed into the material channel, the gas is ignited and combusted instantly because the temperature in the material channel is higher than the ignition point of the mixed gas, the mixed gas is combusted continuously to release heat to complete the heating adjustment of the glass liquid, the air flow is large, the heating amplitude is large, the air flow is small, the heating amplitude is not enough to offset the heat loss, the temperature of the glass liquid shows the characteristic of the cooling trend, the temperature is set according to the production process, the detected temperature of the glass liquid is compared with the set temperature through PID parameters, the air flow is adjusted, and finally the temperature is controlled to be consistent with the set temperature. According to the forming temperature of the glass product, firstly, a left homogenization temperature value and a right homogenization temperature value are set, secondly, a front cooling section temperature value and thirdly, a rear cooling section temperature value are set, so that the temperature of the glass liquid is adjusted, the heating quantity is quantized to 0-100%, and the heating quantity is controlled to be 30-70% during heating in a heating zone, so that the adjusting capacity of the glass liquid when the temperature difference of the glass liquid is large is improved.

Every district section electric actuator still is equipped with a set of first branch pipe pressure limiting pipeline of installation manual ball valve to the compressed air pipeline in below, sets for minimum flow through manual ball valve, guarantees that spray gun internal pressure is greater than material way internal pressure all the time, prevents to take place the dangerous condition of tempering, gathers spray gun internal pressure as close to the spray gun as possible through pressure taking device, installs manometer and transmitting device on every district section hybrid tube and shows corresponding district section spray gun internal pressure, sends pressure digital signal to central processing unit. The temperature of the glass liquid in the material channel is distributed in an annular heat value, the temperature is changed from high to low from inside to outside, a top cooling air channel and a bottom cooling air channel are laid in the longitudinal middle of the front cooling section and the rear cooling section to replace a skylight type heat dissipation opening, the air nozzle, the air pipe and the fan are connected to form a cooling mechanism 9, the cooling amplitude is inversely proportional to the heating quantity of the heating area, the temperature reduction is reduced when the heating is increased, the temperature reduction is increased when the heating is reduced, the heating quantity is collected in various forms, for example, the change of an output signal heated by a central processing unit, the change of an output voltage or current signal of an electric actuator and the change of the internal pressure of a spray gun are collected, the change of the heating quantity can be indirectly reflected, the heating quantity is quantized to 0-100%, the set value of the heating quantity is 30-60%, the temperature reduction trend is enabled to work at a lower intermediate load, and therefore, the glass liquid has enough adjusting capacity to deal with the glass liquid with larger temperature difference.

The electric control system consists of a central processing unit, an interface module, a frequency converter and a computer, replaces the traditional instrument control mode, and overcomes the defects of no adjustment record, insufficient intuition, low control precision, incapability of storing data and the like; the central processing unit is responsible for processing all signal acquisition and controlling the electric actuator and the frequency converter to complete control work according to set control conditions (temperature, heating quantity and the like), and the computer is responsible for transmitting all set data to the central processing unit and displaying, recording and storing all data.

The glass liquid enters the flowing process from the inlet of the material channel to the post-cooling section to the material basin section, and the glass liquid alternately advances in a rolling type upper layer, a middle layer and a lower layer, and the cross section of the glass liquid is divided into 9 areas at the inlet of the material basin section by analyzing the flowing characteristic of the glass liquid, wherein the areas are respectively a left upper part, a left middle part, a left lower part, a middle upper part, a middle part, a middle lower part, a right upper part, a right middle part and a right lower part, 3 three-point embedded thermocouples are respectively inserted into the left part, the middle part and the right part to form 9-point temperature measurement, temperature signals transmitted by the thermocouples are transmitted to a central processing unit, and the temperature value change is visually and dynamically displayed on a computer display; and 3 three-point embedded thermocouples are inserted into the front cooling section and the rear cooling section to finish temperature acquisition. The upper left part temperature is adjusted by setting the temperature of a left homogenizing section heat supply mechanism, the upper right part temperature is adjusted by setting the temperature of a right homogenizing section heat supply mechanism, the upper middle part temperature is adjusted by neutralizing the upper left part temperature and the upper right part temperature, the middle left part temperature and the middle right part temperature are adjusted by setting the temperature of a front cooling section heat supply mechanism, the middle temperature is adjusted by setting the upper cooling air quantity of the front cooling section, the lower left part temperature is adjusted by setting the temperature of a rear cooling section heating mechanism, the middle part temperature is adjusted by setting the front cooling section and the bottom cooling air quantity of the rear cooling section, the adjustment range of 60 percent of the rear cooling section temperature is adopted, and the adjustment range of 25 percent of the front cooling temperature is adopted. The left homogenizing section and the right homogenizing section respectively regulate the temperature of the glass liquid in the region, the front cooling section and the rear cooling section are respectively divided into 3 regions, namely a left area, a middle area and a right area, the heat supply mechanisms at the two sides are responsible for adjusting the temperature of the right area of the left area, the middle area reduces the middle temperature of the molten glass through cooling air to heat the temperature of the molten glass at the two sides and simultaneously reduce the temperature of the molten glass at the middle area, the molten glass passes through a front cooling section, a rear cooling section, a left homogenizing section and a right homogenizing section and has stronger adjusting capability, the precise adjustment and control of the glass liquid, the temperature uniformity of the glass liquid is very high and stable for a long time in 9 areas of the cross section of the glass liquid entering the inlet of the material basin, the heating amount of the material basin area is controlled to be between 20 and 40 percent to offset the heat loss, therefore, the long-term stable glass liquid is provided for the subsequent glass product process, and the requirements of light weight production and long-term and high efficiency are met.

The parts not described in detail in the present invention are prior art.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a glassware gas material says accurate control system which characterized in that: the glass liquid conveying device is provided with a material channel (1) for conveying glass liquid, the material channel (1) is sequentially divided into a rear cooling section (2), a front cooling section (3), a homogenizing section (4) and a material basin section (5) along the conveying direction of the glass liquid, the homogenizing section (4) is divided into a left homogenizing section (6) and a right homogenizing section (7), heat supply mechanisms (8) for independently supplying heat are respectively installed on the rear cooling section (2), the front cooling section (3), the left homogenizing section (6), the right homogenizing section (7) and the material basin section (5), and cooling mechanisms (9) cooperating with the heat supply mechanisms (8) installed on the rear cooling section (2) and the front cooling section (3) are further respectively arranged on the rear cooling section (2) and the front cooling section (3).

2. The glassware gas feed passage precision control system of claim 1, wherein: the cooling mechanisms (9) positioned on the front cooling section (3) and the rear cooling section (2) are identical in structure and respectively comprise an upper cooling mechanism positioned above the pipe wall of the front cooling section (3)/the rear cooling section (2) and a lower cooling mechanism positioned below the pipe wall of the front cooling section (3)/the rear cooling section (2).

3. The system of claim 2, wherein: go up cooling mechanism and descend cooling mechanism structure the same, all include cooling wind channel (12), connect the one end in cooling wind channel (12) and to cooling fan (13) and the connection that the cooling wind channel carried cold wind cooling wind channel (12) other end and with tuyere (14) of material way (1) intercommunication.

4. The glassware gas feed passage precision control system of claim 1, wherein: the heat supply mechanism (8) consists of a plurality of premixed independent spray guns (15) and supplies heat to the material channel (1) through the spray guns (15).

5. The glassware gas feed passage precision control system of claim 1, wherein: and the device also comprises an air supply mechanism for supplying air to each heat supply mechanism (8).

6. The system of claim 5, wherein: the air supply mechanism comprises a gas channel (16) for conveying gas and a compressed air channel (17) for conveying compressed air, and the gas and the compressed air supply the air supply to each heat supply mechanism (8) after the air-fuel ratio is adjusted through a mixing pipeline (18).

7. The system of claim 6, wherein: the mixing pipeline (18) comprises a main pipe (19), a first branch pipe (20) communicated with the compressed air pipeline (17) and a second branch pipe (21) communicated with the gas channel (16), a manual ball valve (22) is installed on the first branch pipe (20), a proportion adjusting valve (23) used for adjusting the air-fuel ratio is installed on the second branch pipe (21), an electric actuator (24) and a flow measurer (25) are further installed on the main pipe (19), the electric actuator (24) is installed at the bottom of the main pipe (19), the installation part of the flow measurer (25) is located below the second branch pipe (21), and a gas mixer (26) is arranged at the top of the main pipe (19).

8. The glassware gas feed passage precision control system of claim 1, wherein: the inner cavity inlet of the material basin section (5) is uniformly divided into a left upper area, a left middle area, a left lower area, a middle upper area, a center area, a middle lower area, a right upper area, a right middle area and a right lower area.

9. The glassware gas feed passage precision control system of claim 8, wherein: still include electrical system, electrical system includes central processing unit collocation computer, thermocouple (27) that are used for temperature acquisition are all installed in basin section (5), preceding cooling zone (3) and back cooling zone (2), thermocouple (27) respectively with central processing unit electricity is connected, thermocouple (27) transmit the temperature information who detects for central controller to show on the computer.