Discharging pipe capable of controlling flow materials and working method of discharging pipe

Abstract

The invention provides a controllable material flow discharging pipe and a working method thereof, and belongs to the field of overflow method high aluminum silicon cover plate glass manufacturing equipment.The controllable material flow discharging pipe comprises a discharging pipe body, a plurality of direct heating loop sets are installed on the discharging pipe body, each direct heating loop set comprises two flanges, a transformer is connected between the two flanges in series, and the transformer is connected with the discharging pipe body. The direct heating loop is connected with a control feedback unit in series, a cooling air ring is further installed on the discharging pipe, the cooling air ring is externally connected with a cooling frequency conversion fan, and the cooling air ring is connected with the control feedback unit in series and connected with the direct heating loop in parallel. Contact type thermocouples are installed on the outer sides of the upper portion and the lower portion of the discharging pipe and connected with a data acquisition unit in series, the data acquisition unit is connected with a data processing unit in parallel, and the data processing unit is connected with a control feedback unit in parallel. The material flowing speed can be controlled, scouring damage to the pipeline caused by uneven material flowing can be reduced, manual operation risks are reduced, the thickness and length of the pipeline can be shortened, cost is saved, and the time of the discharging process is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of equipment for manufacturing high-aluminum-silicate cover glass by the overflow method, and particularly relates to a controllable flow discharging pipe and its working method. Background Art

[0002] The production process of cover glass generally includes processes such as batching, melting, forming, annealing, and cutting. These processes require a high degree of precision and stability to ensure the quality and performance of the final product; during the melting process, the glass liquid needs to maintain a certain fluidity and uniformity at high temperatures so as to form good cover glass in the subsequent forming process.

[0003] Discharging is an indispensable part of the cover glass production process. Timely and effective discharging operations can ensure the continuity and stability of the production process, reduce the risk of material blockage, improve production efficiency. At the same time, a reasonable discharging method can also reduce the internal pressure and protect the safe operation of the tank furnace and channel equipment.

[0004] During the production process of cover glass, the glass liquid needs to be maintained within a certain temperature range to ensure its fluidity and forming quality. However, when the temperature of the glass liquid is too high, its viscosity and fluidity will change, posing higher requirements on the material and corrosion resistance of the discharging pipe. The high-temperature glass liquid may accelerate the aging and corrosion of the discharging pipe, and even cause the discharging pipe to rupture or leak; during the discharging process, human operation factors are also risk points that cannot be ignored. Operators may cause safety accidents such as damage to the discharging pipe and leakage of glass liquid due to lack of experience, improper operation, or carelessness. In addition, the high-temperature and high-pressure working environment may also pose a threat to the physical health of operators. Summary of the Invention

[0005] The purpose of the present invention is to provide a controllable flow discharging pipe and its working method to overcome the problems existing in the prior art. The present invention can not only control the flow rate of the material, reduce the erosion damage of the pipeline caused by uneven material flow, reduce the risk of human operation, but also shorten the thickness and length of the pipeline to save costs and shorten the time of the discharging process.

[0006] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] A controllable flow material discharge pipe, comprising a discharge pipe 1, on which several groups of direct heating circuits 2 are installed. Each group of direct heating circuits 2 includes two flanges, and a transformer is connected in series between the two flanges. The direct heating circuit 2 is connected in series with a control feedback unit 7; a cooling air ring 4 is also installed on the discharge pipe 1, and the cooling air ring 4 is externally connected to a cooling variable-frequency fan. The cooling air ring 4 is connected in series with the control feedback unit 7 and in parallel with the direct heating circuit 2; contact thermocouples 3 are installed on the outer sides of the upper and lower parts of the discharge pipe 1. The contact thermocouples 3 are connected in series with a data acquisition unit 5, and the data acquisition unit 5 is connected in parallel with a data processing unit 6. The data processing unit 6 is connected in parallel with the control feedback unit 7;

[0008] Further, the cooling air ring 4 is installed between the two flanges;

[0009] Further, the cooling air ring 4 is spirally distributed;

[0010] Further, a support brick is installed between the cooling air ring 4 and the discharge pipe 1;

[0011] Further, the data acquisition unit 5, the data processing unit 6, and the control feedback unit 7 are all PLC controllers.

[0012] A working method of a controllable flow material discharge pipe, based on the above-mentioned controllable flow material discharge pipe, includes the following steps:

[0013] (1) Set the temperature difference data through the data processing unit, and then collect the actual temperature of the contact thermocouple through the data acquisition unit and calculate the actual temperature difference data, and transmit the actual temperature difference data to the data processing unit;

[0014] (2) The data processing unit receives the actual temperature difference data. If the actual temperature difference data is close to or equal to the set temperature difference data, stop; if the actual temperature difference data is not close to nor equal to the set temperature difference data, continue to execute (3);

[0015] (3) Calculate the difference between the actual temperature difference data and the set temperature difference data Preset a deviation threshold interval segment, and select the corresponding deviation threshold according to the difference size

[0016] (4) According to the size when discharging or stopping discharging and , adjust the power of the direct heating circuit and the air volume of the cooling air ring through the control feedback unit, and execute (1) again;

[0017] Further, in the (3) above the value range of is 0 to 10 °C;

[0018] Further, the (4) specifically is:

[0019] When starting to unload materials, if then control the feedback unit to increase the power of the direct heating circuit and reduce the air volume of the cooling air ring; if then control the feedback unit not to make any adjustment;

[0020] When stopping to unload materials, if then control the feedback unit to reduce the power of the direct heating circuit and increase the air volume of the cooling air ring; if then control the feedback unit not to make any adjustment.

[0021] Further, the amplitude of adjusting the power of the direct heating circuit in the (4) is 0.1 - 0.5 kw;

[0022] Further, the air volume of adjusting the cooling air ring in the (4) is 50 - 1000 m 3 / h.

[0023] The above technical solution has the following advantages or beneficial effects:

[0024] The present invention provides a controllable flow material discharge pipe, including two groups of direct heating circuits for heating the discharge pipe; through a cooling air ring, and a field variable-frequency cooling fan is externally connected to the inlet of the cooling air ring to achieve fine adjustment of the material temperature; the data acquisition unit and the data processing unit provide adjustment parameters to the control feedback unit, and the direct heating circuit and the cooling air ring make feedbacks to achieve controllable flow of the discharge pipe. The present invention helps to optimize the discharging process, improve production efficiency, and at the same time reduce energy consumption and material waste.

[0025] Further, the cooling air ring is spirally distributed and installed between two flanges, so that the cooling air can blow the surface of the discharge pipe more evenly, thereby improving the cooling efficiency, helping to quickly reduce the temperature of the material in the discharge pipe, and achieving more precise temperature control;

[0026] Further, by arranging support bricks between the cooling air ring and the discharge pipe to pad the cooling air ring and prevent the cooling air ring from directly contacting the discharge pipe, it helps to increase the service life of the device;

[0027] Further, integrating the data acquisition, data processing and control feedback functions in a PLC controller simplifies the system structure, improves the integration degree and reliability of the system. The PLC controller has powerful data processing and logical judgment capabilities, and can automatically adjust the heating and cooling parameters according to the preset program and real-time data to achieve intelligent control.

[0028] The present invention also provides a working method for controlling the discharge pipe of flowing material. By collecting the temperature difference between the upper and lower sides of the discharge pipe and adjusting the current of the direct heating circuit and the air volume of the cooling air ring according to the deviation between the input temperature difference and the actual temperature difference, the input temperature difference is made consistent with the actual temperature difference, realizing the control of flowing material. This can not only shorten the length of the feeding pipe, save costs, but also effectively prevent the scouring damage of the discharge pipe caused by uneven flowing material speed, reduce the risk of manual operation, and shorten the discharge time.

[0029] Further, the temperature threshold is set within the range of 0 - 10°C, so that the actual material temperature in the discharge pipe can be kept within a certain range from the input temperature.

[0030] Further, by adjusting the heating and cooling parameters in real time according to the temperature deviation, step four can ensure that the temperature in the discharge pipe is always kept within the preset range, thus realizing precise temperature control to make the input temperature difference consistent with the actual temperature difference and achieving the control of flowing material.

[0031] Further, by setting the power amplitude of the direct heating circuit and the air volume of the cooling air ring to be adjusted, the fine temperature control means that the heating and cooling processes can respond to the temperature deviation more quickly and accurately, thereby reducing the production interruption time caused by temperature adjustment, helping to improve production efficiency, and ensuring the stable operation of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic structural diagram of a discharge pipe for controlling flowing material according to the present invention;

[0033] Figure 2 It is a schematic flow diagram of a working method of a discharge pipe for controlling flowing material according to the present invention;

[0034] In the figure, 1 - discharge pipe; 2 - direct heating circuit; 3 - contact thermocouple; 4 - cooling air ring; 5 - data acquisition unit; 6 - data processing unit; 7 - control feedback unit; 8 - support brick. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] The following further describes the present invention in detail with specific embodiments, which is an explanation rather than a limitation of the present invention.

[0036] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of the present invention are used to distinguish similar objects and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0038] Embodiment 1:

[0039] As Figure 1 shown, the present invention provides a controllable flow material discharge pipe, which includes a discharge pipe 1. A number of groups of direct heating circuits 2 are installed on the discharge pipe 1. Each group of direct heating circuits 2 includes two flanges, and a transformer is connected in series between the two flanges. A number of groups of direct heating circuits 2 are connected in series with a control feedback unit 7; a cooling air ring 4 is also installed on the discharge pipe 1 in a spiral distribution. The cooling air ring 4 is externally connected to a cooling variable-frequency fan. The cooling air ring 4 is connected in series with the control feedback unit 7 and in parallel with the direct heating circuits 2; contact thermocouples 3 are installed on the outer sides of the upper and lower parts of the discharge pipe 1. The contact thermocouples 3 are connected in series with a data acquisition unit 5. The data acquisition unit 5 is connected in parallel with a data processing unit 6. The data processing unit 6 is connected in parallel with the control feedback unit 7;

[0040] Preferably, a support brick 8 is installed between the cooling air ring 4 and the discharge pipe 1;

[0041] Preferably, the data acquisition unit 5, the data processing unit 6 and the control feedback unit 7 are all PLC controllers.

[0042] Embodiment 2:

[0043] As Figure 1As shown in the figure, the present invention provides a controllable flow material discharge pipe, which includes a discharge pipe 1. Two groups of direct heating circuits 2 are installed on the discharge pipe 1. Each group of direct heating circuits 2 includes two flanges, and a transformer is connected in series between the two flanges. The two groups of direct heating circuits 2 are connected in series with a control feedback unit 7; a cooling air ring 4 is also installed on the discharge pipe 1 in a spiral distribution. A support brick 8 is installed between the cooling air ring 4 and the discharge pipe 1. The cooling air ring 4 is externally connected to a cooling variable-frequency fan. The cooling air ring 4 is connected in series with the control feedback unit 7 and in parallel with the direct heating circuit 2; contact thermocouples 3 are installed on the outer sides of the upper and lower parts of the discharge pipe 1. The contact thermocouples 3 are connected in series with a data acquisition unit 5 for detecting the temperatures and temperature differences of the upper and lower contact thermocouples 3. The data acquisition unit 5 is connected in parallel with a data processing unit 6 for calculating the difference between the actual temperature difference and the set temperature difference. The data processing unit 6 is connected in parallel with the control feedback unit 7. The control feedback unit 7 is used to adjust the power of the direct heating circuit 2 and the air volume of the cooling air ring 4;

[0044] Preferably, the discharge pipe 1 is made of platinum-rhodium alloy, with the rhodium component accounting for 5% to 15%, the length being 550 to 700 mm, the inner diameter being 45 to 50 mm, and the wall thickness being 1 to 6 mm;

[0045] Preferably, the upper power limit of each group of direct heating circuits 2 is 5 kw;

[0046] Preferably, an induction valve is provided at the outlet of the cooling variable-frequency fan;

[0047] Preferably, the cooling air ring 4 is installed between each group of direct heating circuits 2;

[0048] Preferably, the thickness of the support brick 8 is 10 mm to prevent the risk of conductivity;

[0049] Preferably, the data acquisition unit 5, the data processing unit 6, and the control feedback unit 7 are all PLC controllers, which can realize digital logic control and load control instructions into the internal memory and execute them at any time.

[0050] Example 3:

[0051] As Figure 2 shown, a working method of a controllable flow material discharge pipe, based on the above-mentioned controllable flow material discharge pipe, includes the following steps:

[0052] (1) Set the temperature difference data through the data processing unit 6, and then collect the actual temperatures of the contact thermocouples 3 through the data acquisition unit 5 and calculate the actual temperature difference data, and transmit the actual temperature difference data to the data processing unit 6;

[0053] (2) The data processing unit 6 receives the actual temperature difference data. If the actual temperature difference data is close to or equal to the set temperature difference data, it executes stop; if the actual temperature difference data is not close to and not equal to the set temperature difference data, it continues to execute (3);

[0054] (3) Calculate the difference between the actual temperature difference data and the set temperature difference data Preset a deviation threshold The range is 0 to 10 °C. According to the difference Select the corresponding deviation threshold according to the magnitude

[0055] (4) According to the magnitude when discharging is started or stopped and Adjust the power of the direct heating circuit 2 and the air volume of the cooling air ring 4 through the control feedback unit 7, and execute (1) again;

[0056] Preferably, (4) is specifically:

[0057] When discharging is started, if then control the feedback unit 7 to increase the power of the direct heating circuit 2 and decrease the air volume of the cooling air ring 4; if then control the feedback unit 7 not to make adjustments;

[0058] When discharging is stopped, if then control the feedback unit 7 to decrease the power of the direct heating circuit 2 and increase the air volume of the cooling air ring 4; if then control the feedback unit 7 not to make adjustments;

[0059] Preferably, the power adjustment range of the direct heating circuit 2 is 0.1 to 0.5 kw; the air volume adjustment of the cooling air ring 4 is 50 to 1000 m 3 / h.

[0060] Example 4:

[0061] As Figure 2 shown, a working method of a controllable flow material discharge pipe, based on the above-mentioned controllable flow material discharge pipe, includes the following steps:

[0062] (1) Set the temperature difference data through the data processing unit 6, then collect the actual temperature of the contact thermocouple 3 through the data acquisition unit 5 and calculate the actual temperature difference data, and transmit the actual temperature difference data to the data processing unit 6;

[0063] (2) The data processing unit 6 receives the actual temperature difference data. If the actual temperature difference data is close to or equal to the set temperature difference data, it executes stop; if the actual temperature difference data is not close to and not equal to the set temperature difference data, it continues to execute (3);

[0064] (3) Calculate the difference between the actual temperature difference data and the set temperature difference data Preset 1 deviation threshold The interval is 0°C. According to the difference Select the corresponding deviation threshold based on the magnitude

[0065] (4) When starting to unload, if Then control the feedback unit 7 to increase the power of the direct heating circuit 2 by 0.1 kw and reduce the air volume of the cooling air ring 4 by 50 m 3 / h; if Then control the feedback unit 7 not to make adjustments;

[0066] When stopping to unload, if Then control the feedback unit 7 to reduce the power of the direct heating circuit 2 by 0.1 kw and increase the air volume of the cooling air ring 4 by 50 m 3 / h; if Then control the feedback unit 7 not to make adjustments.

[0067] Example 5:

[0068] As Figure 2 shown, a working method for a controllable flow material discharge pipe, based on the above-mentioned controllable flow material discharge pipe, includes the following steps:

[0069] (1) Set the temperature difference data through the data processing unit 6, then collect the actual temperature of the contact thermocouple 3 through the data acquisition unit 5 and calculate the actual temperature difference data, and transmit the actual temperature difference data to the data processing unit 6;

[0070] (2) The data processing unit 6 receives the actual temperature difference data. If the actual temperature difference data is close to or equal to the set temperature difference data, stop; if the actual temperature difference data is not close and not equal to the set temperature difference data, continue to execute (3);

[0071] (3) Calculate the difference between the actual temperature difference data and the set temperature difference data Preset 1 deviation threshold The interval is 5°C. According to the difference Select the corresponding deviation threshold based on the magnitude

[0072] (4) When starting to unload, if Then control the feedback unit 7 to increase the power of the direct heating circuit 2 by 0.25 kw and reduce the air volume of the cooling air ring 4 by 500 m 3 / h; if Then control the feedback unit 7 not to make adjustments;

[0073] When stopping to unload, if Then control the feedback unit 7 to reduce the power of the 0.25 kw direct heating circuit 2 and increase the air volume of the 500 m 3 / h cooling air ring 4; If Then control the feedback unit 7 not to make adjustments.

[0074] Example 6:

[0075] As Figure 2 shown, a working method for a controllable flow material discharge pipe, based on the above-mentioned controllable flow material discharge pipe, includes the following steps:

[0076] (1) Set the temperature difference data through the data processing unit 6, then collect the actual temperature of the contact thermocouple 3 through the data acquisition unit 5 and calculate the actual temperature difference data, and transmit the actual temperature difference data to the data processing unit 6;

[0077] (2) The data processing unit 6 receives the actual temperature difference data. If the actual temperature difference data is close to or equal to the set temperature difference data, stop; if the actual temperature difference data is neither close to nor equal to the set temperature difference data, continue to execute (3);

[0078] (3) Calculate the difference between the actual temperature difference data and the set temperature difference data Preset a deviation threshold The interval is 10 °C. According to the difference Select the corresponding deviation threshold according to the size

[0079] (4) When starting to unload, if Then control the feedback unit 7 to increase the power of the 0.5 kw direct heating circuit 2 and reduce the air volume of the 1000 m 3 / h cooling air ring 4; If Then control the feedback unit 7 not to make adjustments;

[0080] When stopping to unload, if Then control the feedback unit 7 to reduce the power of the 0.5 kw direct heating circuit 2 and increase the air volume of the 1000 m 3 / h cooling air ring 4; If Then control the feedback unit 7 not to make adjustments.

[0081] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A controllable flow material discharge pipe, characterized in that: The invention comprises a discharge pipe (1), on which a plurality of groups of direct heating circuits (2) are installed, each group of direct heating circuits (2) comprises two flanges, a transformer is connected in series between the two flanges, and the direct heating circuit (2) is connected in series with a control feedback unit (7); a cooling air ring (4) is also installed on the discharge pipe (1), the cooling air ring (4) is externally connected to a cooling variable frequency fan, the cooling air ring (4) is connected in series with the control feedback unit (7), and is connected in parallel with the direct heating circuit (2); contact thermocouples (3) are installed on the outer sides of the upper and lower parts of the discharge pipe (1), the contact thermocouples (3) are connected in series with a data acquisition unit (5), the data acquisition unit (5) is connected in parallel with a data processing unit (6), and the data processing unit (6) is connected in parallel with the control feedback unit (7).

2. A controllable flow material discharge pipe according to claim 1, characterized in that: The cooling air ring (4) is installed between the two flanges.

3. A controllable flow material discharge pipe according to claim 1, characterized in that: The cooling air ring (4) is distributed in a spiral shape.

4. A controllable flow material discharge pipe according to claim 1, characterized in that: A supporting brick (8) is installed between the cooling air ring (4) and the discharge pipe (1).

5. A controllable flow material discharge pipe according to claim 1, characterized in that: The data acquisition unit (5), the data processing unit (6) and the control feedback unit (7) are all PLC controllers.

6. A method for operating a flow-controlled material discharge pipe, based on the flow-controlled material discharge pipe according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1, setting temperature difference data through a data processing unit (6), then collecting the actual temperature of the contact thermocouple (3) through a data acquisition unit (5) and calculating the actual temperature difference data, and transmitting the actual temperature difference data to the data processing unit (6); S2, the data processing unit (6) receives the actual temperature difference data. If the actual temperature difference data is close to or equal to the set temperature difference data, the execution stops; if the actual temperature difference data is neither close to nor equal to the set temperature difference data, the execution continues to S3; S3, calculate the difference between the actual temperature difference data and the set temperature difference data Preset 1 deviation threshold Interval segment, based on the difference The deviation threshold corresponding to the size selection S4, according to the start or stop of unloading and The power of the direct heating circuit (2) and the air volume of the cooling air loop (4) are adjusted by controlling the feedback unit (7), and S1 is executed again.

7. A method for operating a flow-controlled material discharge pipe according to claim 6, characterized in that: The S3 The value range is 0~10℃.

8. The method for operating a flow-controllable material discharge pipe according to claim 6, characterized in that: The S4 is specifically: When opening the unloading The control feedback unit (7) increases the power of the direct heating circuit (2) and reduces the air volume of the cooling air loop (4); if Then the control feedback unit (7) does not make any adjustments; When stopping unloading, if The feedback unit (7) is controlled to reduce the power of the direct heating circuit (2) and increase the air volume of the cooling air loop (4); if Then the control feedback unit (7) does not make any adjustments.

9. The method for operating a discharge pipe with controlled flow according to claim 6, characterized in that: In said S4, the power range of the direct heating circuit (2) is adjusted to 0.1-0.5 kW.

10. The method for operating a discharge pipe with controlled flow according to claim 6, characterized in that: In S4, the air volume of the cooling air ring (4) is adjusted to 50-1000m 3 / h.

Images